Physiology Lab Test 33454
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Questions and Answers
- 1.
When cardiac muscle contracts what happens
- A.
Blood circulates, delivering nutrients to cells and removing cell waste
- B.
Changes the internal diameter of hollow organs
- C.
Moves the entire body in its environement
Correct Answer
A. Blood circulates, delivering nutrients to cells and removing cell wasteExplanation
When cardiac muscle contracts, it creates pressure that pushes blood out of the heart and into the blood vessels. This contraction allows the blood to circulate throughout the body, delivering oxygen and nutrients to the cells and removing waste products from the cells. Therefore, the correct answer is that when cardiac muscle contracts, blood circulates, delivering nutrients to cells and removing cell waste.Rate this question:
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- 2.
Where is smooth muscle located
- A.
Heart
- B.
Walls of hollow organs
- C.
Attached to skeleton
Correct Answer
B. Walls of hollow organsExplanation
Smooth muscle is located in the walls of hollow organs. This type of muscle is responsible for the involuntary movements of these organs, such as the contraction and relaxation of the stomach, intestines, blood vessels, and other structures. Smooth muscle is different from skeletal muscle, which is attached to the skeleton and responsible for voluntary movements, and cardiac muscle, which is found in the heart.Rate this question:
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- 3.
Which of the following are true of smooth muscle(more then one answer)
- A.
Found in intestines
- B.
Changes the internal diameter of hollow organs
- C.
Found in lungs
- D.
Found in blood vessels
- E.
Helps us move
- F.
Is attached to bone
Correct Answer(s)
A. Found in intestines
B. Changes the internal diameter of hollow organs
C. Found in lungs
D. Found in blood vesselsExplanation
Smooth muscle is found in the intestines, lungs, and blood vessels. It is responsible for changing the internal diameter of hollow organs, such as the intestines, to facilitate movement and digestion. Smooth muscle is also found in the lungs and helps with the contraction and relaxation of the airways. Additionally, smooth muscle is found in blood vessels and helps regulate blood flow and pressure. However, smooth muscle is not attached to bone, and it is skeletal muscle that helps us move.Rate this question:
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- 4.
What is the primary function of muscle
- A.
To help us move
- B.
To produce ATP
- C.
To convert chemical energy to mechanical work
- D.
To convert mechanical work to chemical energy
Correct Answer
C. To convert chemical energy to mechanical workExplanation
The primary function of muscle is to convert chemical energy to mechanical work. Muscles are able to do this through a process called contraction, where they generate force and cause movement in the body. This conversion of chemical energy, usually in the form of ATP, allows muscles to perform various tasks such as lifting, running, and even breathing. Without this ability to convert chemical energy to mechanical work, muscles would not be able to fulfill their role in enabling movement and performing essential bodily functions.Rate this question:
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- 5.
Human skeletal muscles consist of hundreds of what
Correct Answer
fibersExplanation
The human skeletal muscles consist of hundreds of fibers. These fibers are long, cylindrical cells that are responsible for the contraction and movement of the muscles. Each muscle fiber is made up of smaller units called myofibrils, which contain proteins that enable muscle contraction. The arrangement and interaction of these fibers allow the muscles to generate force and produce movement in the body.Rate this question:
- 6.
Fibers are bound together by what
Correct Answer
connective tissueExplanation
Connective tissue is responsible for binding fibers together. It is a type of biological tissue that supports, connects, or separates different types of tissues and organs in the body. Connective tissue is composed of fibers, cells, and a gel-like substance called ground substance. The fibers, such as collagen and elastin, provide strength and elasticity to the tissue, allowing it to bind and hold structures together. Therefore, connective tissue is the correct answer as it is the main component that binds fibers together.Rate this question:
- 7.
Skeletal muscles are stimulated to contract by what
- A.
Sensory motor nerves
- B.
CNS
- C.
Autonomic nerves
- D.
Somatic motor nerves
Correct Answer
D. Somatic motor nervesExplanation
Skeletal muscles are stimulated to contract by somatic motor nerves. These nerves are responsible for carrying signals from the central nervous system (CNS) to the skeletal muscles. Unlike autonomic nerves, which control involuntary functions, and sensory motor nerves, which transmit sensory information, somatic motor nerves specifically control voluntary movements. Therefore, when the somatic motor nerves are activated, they send signals to the skeletal muscles, causing them to contract.Rate this question:
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- 8.
Somatic motor nerves carry signals in the form of nerve impulses from the brain or spinal cord to the skeletal muscles
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Somatic motor nerves are responsible for transmitting nerve impulses from the brain or spinal cord to the skeletal muscles. This allows for voluntary movement and control over our muscles. Therefore, the statement that somatic motor nerves carry signals from the brain or spinal cord to the skeletal muscles is true.Rate this question:
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- 9.
What are axons
- A.
Muscle fibers
- B.
Nerve fibers
- C.
Collagen fibers
- D.
Bone fibers
Correct Answer
B. Nerve fibersExplanation
Axons are long, slender projections of nerve cells that transmit electrical impulses to other cells, such as muscles or other neurons. They are responsible for carrying information from the cell body of a neuron to the target cells, allowing for the communication and coordination of various bodily functions. Therefore, the correct answer is nerve fibers, as axons are a type of nerve fiber.Rate this question:
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- 10.
Axons leave the spinal cord via what
Correct Answer
spinal nerves
the spinal nervesExplanation
Axons leave the spinal cord via the spinal nerves. The spinal nerves are a part of the peripheral nervous system and they emerge from the spinal cord through small openings between the vertebrae called intervertebral foramina. These nerves carry sensory information from the body to the spinal cord and transmit motor signals from the spinal cord to the muscles and organs. Therefore, the spinal nerves are responsible for the communication between the spinal cord and the rest of the body.Rate this question:
- 11.
Axons leave the brain via what
Correct Answer
cranial nerves
the cranial nervesExplanation
The axons leave the brain through the cranial nerves. The cranial nerves are a set of 12 pairs of nerves that originate from the brain and extend to various parts of the head and neck. These nerves serve different functions, including sensory, motor, and autonomic functions. Therefore, it is through the cranial nerves that the axons are able to transmit signals from the brain to the different parts of the body.Rate this question:
- 12.
Axons are distributed to appropriate skeletal muscles in the form of what
Correct Answer
peripheral nerveExplanation
Axons are distributed to appropriate skeletal muscles in the form of peripheral nerves. Peripheral nerves are bundles of axons that extend from the spinal cord to various parts of the body. These nerves carry signals from the central nervous system to the skeletal muscles, allowing for voluntary movement and control. The axons within the peripheral nerves branch out and innervate specific skeletal muscles, ensuring that the signals are delivered to the correct muscles for coordinated movement. Therefore, peripheral nerves play a crucial role in connecting the central nervous system to the skeletal muscles.Rate this question:
- 13.
Upon reaching the muscle, each nerve fiber branches and innervates one individual muscle fiber
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
upon reaching the muscle, each nerve fiber branches and innervates several individual muscle fibersRate this question:
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- 14.
Each muscle fiber is innervated by how many motor neurons
- A.
Two
- B.
One
- C.
Hundreds
- D.
Ten
Correct Answer
B. OneExplanation
Each muscle fiber is innervated by one motor neuron. This means that a single motor neuron is responsible for transmitting signals to a specific muscle fiber, allowing it to contract and produce movement. Multiple muscle fibers can be innervated by the same motor neuron, forming a motor unit. The motor neuron and the muscle fibers it innervates work together to coordinate muscle contractions.Rate this question:
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- 15.
The combination of a single motor neuron and all the muscle fibers it controls is called what
- A.
Motor neuron
- B.
Neuron unit
- C.
Muscle fiber
- D.
Motor unit
Correct Answer
D. Motor unitExplanation
A motor unit refers to the combination of a single motor neuron and all the muscle fibers it controls. The motor neuron sends signals to the muscle fibers to contract and produce movement. Therefore, the term "motor unit" accurately describes this functional unit in the neuromuscular system.Rate this question:
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- 16.
When a somatic motor neuron is activated , all of the muscle fibers it innervates respond to the neurons impulses by generating their own electrical signals that lead to contraction of the activated muscle fiber
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
When a somatic motor neuron is activated, it sends electrical signals called impulses to the muscle fibers it innervates. These impulses cause the muscle fibers to generate their own electrical signals, which ultimately lead to the contraction of the activated muscle fiber. This process is known as excitation-contraction coupling and is a fundamental mechanism in muscle physiology. Therefore, the statement is true.Rate this question:
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- 17.
The size of the motor unit arrangment of a skeletal muscle is determined by what
- A.
Function and location in the body
- B.
The size of it
- C.
The function and size
- D.
Location in body and size
Correct Answer
A. Function and location in the bodyExplanation
The size of the motor unit arrangement of a skeletal muscle is determined by its function and location in the body. Motor units consist of a motor neuron and the muscle fibers it innervates. The function of a muscle determines the number and size of motor units needed to perform specific tasks. For example, muscles involved in fine motor skills require smaller motor units, while muscles involved in powerful movements require larger motor units. Additionally, the location of the muscle in the body can also influence the size of its motor unit arrangement, as different muscles have different functional demands based on their anatomical location.Rate this question:
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- 18.
The smaller the size of a muscles motor unit the less the number of neurons needed for control of the muscles
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
it is not less , it is greaterRate this question:
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- 19.
Physiologically the degree of skeletal muscle contraction is controlled by what (more then one answer)
- A.
Increasing the strength of each nerve fiber in the muscle
- B.
Activating a desired number of motor units within the muscle
- C.
Controlling the frequency and strength of motor neuron impulses in all the motor units
- D.
Controlling the frequency of motor neurons impulses in each motor unit
Correct Answer(s)
B. Activating a desired number of motor units within the muscle
D. Controlling the frequency of motor neurons impulses in each motor unitExplanation
The degree of skeletal muscle contraction is controlled by activating a desired number of motor units within the muscle, which means that the brain sends signals to activate a specific number of motor units to contract the muscle. Additionally, controlling the frequency of motor neuron impulses in each motor unit also plays a role in controlling the degree of muscle contraction. By adjusting the frequency of these impulses, the brain can regulate the strength and duration of the muscle contraction.Rate this question:
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- 20.
What is tonus
- A.
A constant state of slight tension that serves to maintain the muscle in a state of readiness
- B.
A fluctuating state of slight tension that serves to maintain the muscle in a state of readiness
- C.
Changing in the state of muscle strength
- D.
When the brain increases the number of simultaneously active motor units within the muscle
Correct Answer
A. A constant state of slight tension that serves to maintain the muscle in a state of readinessExplanation
Tonus refers to a constant state of slight tension that helps to keep the muscles prepared and ready for action. It is not a fluctuating state, nor does it involve changes in muscle strength or an increase in the number of active motor units in the muscle. Tonus is important for maintaining posture and stability in the body.Rate this question:
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- 21.
The source of signals detected by the EMG Electrodes is when the motor neuron is activated, the component muscle fibers generate and conduct their own electrical impulses that ultimatley result in contraction of the fibers
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
motor unitRate this question:
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- 22.
An electromyography is the detection, amplication, and recording of changes in the skin voltaged produced by underlying skeletal muscle contraction
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Electromyography (EMG) is a technique used to measure and record the electrical activity produced by skeletal muscles. It involves the detection and amplification of changes in voltage that occur when muscles contract. Therefore, the statement that an electromyography is the detection, amplification, and recording of changes in the skin voltage produced by underlying skeletal muscle contraction is true.Rate this question:
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- 23.
What is tetany
- A.
The sustained fusion of individual muscle twitches
- B.
Application of a force that results in the movement of an object
- C.
The sustained fusion of many muscle twitches
- D.
The flucuating fusion of many muscle twitches
Correct Answer
A. The sustained fusion of individual muscle twitchesExplanation
Tetany refers to the sustained fusion of individual muscle twitches. This means that the muscle twitches in the body occur continuously and fuse together, resulting in a prolonged contraction of the muscles. This condition can lead to muscle stiffness, spasms, and cramps. It is often caused by low levels of calcium in the blood or a disturbance in the balance of electrolytes.Rate this question:
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- 24.
Most human skeletal muscles are composed of one motor units
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
hundredsRate this question:
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- 25.
The brain determines the number of active motor units required for a muscle to perform a given task by doing what (more then one answer)
- A.
Utilizing sensory information from stretch receptors in the muscle
- B.
Utilizing motor information from stretch receptors in the muscle
- C.
Utilizing sensory information from stretch receptors in the joint capsules
- D.
Utilizing sensory information from stretch receptors in associated tendons
- E.
Utilizing sensory information from stretch receptors in the brain
Correct Answer(s)
A. Utilizing sensory information from stretch receptors in the muscle
C. Utilizing sensory information from stretch receptors in the joint capsules
D. Utilizing sensory information from stretch receptors in associated tendonsExplanation
The brain determines the number of active motor units required for a muscle to perform a given task by utilizing sensory information from stretch receptors in the muscle, joint capsules, and associated tendons. These stretch receptors provide feedback to the brain about the length and tension of the muscle, allowing the brain to adjust the recruitment of motor units accordingly. This ensures that the appropriate amount of force is generated by the muscle to perform the task effectively and efficiently.Rate this question:
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- 26.
Skeletal muscles performing acute maximum work or chronic submaximum work of a repetive nature will eventually do what
Correct Answer(s)
fatigueExplanation
When skeletal muscles perform acute maximum work or chronic submaximum work of a repetitive nature, they will eventually experience fatigue. This is because these types of activities put a significant amount of stress on the muscles, causing them to deplete their energy stores and accumulate metabolic waste products. As a result, the muscles become less efficient and struggle to maintain their contractions, leading to a sensation of tiredness and decreased performance.Rate this question:
- 27.
During contraction skeletal muscle cells convert chemical energy into what two types of energy
Correct Answer(s)
thermal and mechanical
mechanical and thermalExplanation
During contraction, skeletal muscle cells convert chemical energy into thermal energy, which is released as heat, and mechanical energy, which is used to generate movement. The conversion of chemical energy into thermal energy helps to maintain body temperature, while the conversion into mechanical energy allows for the contraction and relaxation of muscles, enabling movement. Both types of energy are essential for the proper functioning of skeletal muscles.Rate this question:
- 28.
What is power
- A.
The amount of work done per unit time
- B.
The measurement of power
- C.
The graphic record derived from the use of a dynagram
- D.
Increase in the muscles ability to generate force
Correct Answer
A. The amount of work done per unit timeExplanation
The correct answer is "the amount of work done per unit time." Power is a measure of how quickly work is done or how quickly energy is transferred. It is calculated by dividing the amount of work done by the time taken to do that work. In other words, power tells us how fast energy is being used or transformed.Rate this question:
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- 29.
What is Dynamometry
- A.
The amount of work done per unit time
- B.
The measurement of power
- C.
The graphic record derived from the use of a dynagram
- D.
Increase in the muscles ability to generate force
Correct Answer
B. The measurement of powerExplanation
Dynamometry refers to the measurement of power. It is a method used to quantify the amount of force or power exerted by an object or individual. This measurement is typically done using specialized instruments or devices that can accurately capture and analyze the force being applied. By measuring power, dynamometry allows for the evaluation of performance, strength, and efficiency in various fields such as sports, medicine, and engineering.Rate this question:
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- 30.
What is a dynagram
- A.
The amount of work done per unit time
- B.
The measurement of power
- C.
Increase in the muscles ability to generate force
- D.
The graphic record derived from the use of a dynagram
Correct Answer
D. The grapHic record derived from the use of a dynagramExplanation
A dynagram refers to the graphic record obtained from the use of a dynagram. This means that when using a dynagram, which is a device used to measure power, a graphic record is produced. This record visually represents the data collected by the dynagram, providing a visual representation of the power measurements taken. Therefore, the correct answer is "the graphic record derived from the use of a dynagram."Rate this question:
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- 31.
Most common language of nervous system
Correct Answer
APs
action potentialsExplanation
APs, or action potentials, are the most common language of the nervous system. Action potentials are electrical signals that travel along the neurons, allowing for communication between different parts of the nervous system. These signals are generated when there is a change in the electrical potential across the neuron's membrane. By transmitting these action potentials, the nervous system is able to convey information and coordinate various physiological processes, such as sensory perception, motor control, and cognitive functions. Therefore, APs can be considered as the primary means of communication within the nervous system.Rate this question:
- 32.
Transduce , each type responds to a particular what
Correct Answer
modalityExplanation
In the given question, the word "transduce" suggests the process of converting one form of energy into another. The phrase "each type responds to a particular what" implies that there are different types of something that react or respond to a specific factor. The word "modality" refers to a particular mode or method of doing something. Therefore, the correct answer "modality" fits well in the context as it signifies that each type responds to a specific mode or method.Rate this question:
- 33.
Sensory receptors can be simple dendritic endings of neurons
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Sensory receptors can indeed be simple dendritic endings of neurons. These dendritic endings are specialized to detect specific types of stimuli, such as touch, temperature, or pain. When these sensory receptors are activated by a stimulus, they generate electrical signals that are transmitted to the central nervous system for processing and interpretation. Therefore, it is true that sensory receptors can be simple dendritic endings of neurons.Rate this question:
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- 34.
Sensory receptors cannot be categorized according to location
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Sensory receptors can indeed be categorized according to their location. For example, receptors in the skin are responsible for detecting touch, pressure, and temperature, while receptors in the eyes detect light and enable vision. Similarly, receptors in the ears detect sound waves and contribute to hearing. Therefore, the statement that sensory receptors cannot be categorized according to location is false.Rate this question:
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- 35.
Cutaneous receptors are near what
- A.
Near neuron cells
- B.
An epithelial surface
- C.
Near muscle fibers
- D.
Part of sensory receptors
Correct Answer
B. An epithelial surfaceExplanation
Cutaneous receptors are sensory receptors located in the skin. They are responsible for detecting various stimuli such as touch, pressure, temperature, and pain. These receptors are found near an epithelial surface, which refers to the outermost layer of the skin. The proximity of cutaneous receptors to the epithelial surface allows them to efficiently sense and transmit sensory information to the adjacent neuron cells, which then send signals to the brain for processing and interpretation.Rate this question:
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- 36.
Cutaneous receptors respond to what (more then one answer)
- A.
Hearing
- B.
Sight
- C.
Touch
- D.
Pressure
- E.
Equilibrium
- F.
Temperature
- G.
Smell
- H.
Pain
Correct Answer(s)
C. Touch
D. Pressure
F. Temperature
H. PainExplanation
Cutaneous receptors are sensory receptors located in the skin that respond to various stimuli. These receptors are responsible for detecting touch, pressure, temperature, and pain. When these receptors are activated, they send signals to the brain, allowing us to perceive and respond to these different sensations. Therefore, the correct answer includes touch, pressure, temperature, and pain as these are the stimuli that cutaneous receptors respond to.Rate this question:
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- 37.
Cutaneous sensations include what (more then one answer)
- A.
Touch
- B.
Sight
- C.
Pressure
- D.
Heat
- E.
Hearing
- F.
Cold
- G.
Pain
Correct Answer(s)
A. Touch
C. Pressure
D. Heat
F. Cold
G. PainExplanation
Cutaneous sensations refer to the sensations that are perceived through the skin. These sensations include touch, pressure, heat, cold, and pain. Touch is the perception of physical contact with objects or surfaces. Pressure refers to the sensation of force applied to the skin. Heat is the perception of high temperature, while cold is the perception of low temperature. Pain is the unpleasant sensation caused by injury or damage to the skin. Sight and hearing are not considered cutaneous sensations as they are related to vision and hearing, respectively, rather than the perception of stimuli through the skin.Rate this question:
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- 38.
In cutaneous sensations they are mediated by free and ____ nerve endings
Correct Answer(s)
encapsulatedExplanation
Cutaneous sensations are sensations that are perceived through the skin. These sensations are mediated by nerve endings, which are specialized structures that detect and transmit sensory information to the brain. In the case of cutaneous sensations, they are specifically mediated by free nerve endings and encapsulated nerve endings. Free nerve endings are found throughout the skin and are responsible for detecting pain, temperature, and itch. Encapsulated nerve endings, on the other hand, are specialized structures that are surrounded by connective tissue capsules. They are responsible for detecting more specific sensations such as touch, pressure, and vibration. Therefore, the correct answer is "encapsulated."Rate this question:
- 39.
Free nerve ending mediate what (more then one answer)
- A.
Heat
- B.
Cold
- C.
Touch
- D.
Pain
Correct Answer(s)
A. Heat
B. Cold
D. PainExplanation
Free nerve endings are sensory receptors that are found throughout the body and are responsible for detecting and transmitting different types of sensations to the brain. They are particularly involved in mediating the sensations of heat, cold, and pain. When exposed to heat or cold stimuli, free nerve endings detect the temperature change and send signals to the brain, allowing us to perceive the sensation of heat or cold. Additionally, free nerve endings are also responsible for detecting and transmitting the sensation of pain, helping us to recognize and respond to potentially harmful stimuli.Rate this question:
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- 40.
Where are cold receptors located
- A.
Upper dermis
- B.
Lower dermis
- C.
Both in the upper and lower dermis
- D.
Epidermis
Correct Answer
A. Upper dermisExplanation
Cold receptors are located in the upper dermis. The dermis is the second layer of the skin, and it is divided into two parts: the upper dermis and the lower dermis. The upper dermis is closer to the surface of the skin, while the lower dermis is deeper. Cold receptors are responsible for detecting and responding to cold temperatures, and their location in the upper dermis allows them to quickly sense changes in temperature on the skin's surface.Rate this question:
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- 41.
Where are warm receptors located
- A.
Epidermis
- B.
Both in upper and lower dermis
- C.
Upper dermis
- D.
Deeper in dermis
Correct Answer
D. Deeper in dermisExplanation
Warm receptors are located deeper in the dermis. The dermis is the second layer of the skin, located beneath the epidermis. It contains various sensory receptors, including warm receptors, which are responsible for detecting and transmitting signals related to warmth or high temperatures. These receptors are positioned deeper within the dermis to ensure accurate detection and transmission of thermal stimuli.Rate this question:
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- 42.
What is this "Area of skin whose stimulation results in changes in firing rate of sensory neuron"
Correct Answer
Receptive Field
receptive fieldExplanation
The term "receptive field" refers to the specific area of skin that, when stimulated, causes a sensory neuron to change its firing rate. This means that when a stimulus is applied to the receptive field, the sensory neuron will respond by increasing or decreasing its rate of firing. The receptive field can vary in size and location depending on the specific sensory system involved. Overall, the receptive field plays a crucial role in understanding how sensory information is processed and transmitted in the nervous system.Rate this question:
- 43.
In receptive fields areas varies directly with density of receptors
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
inverselyRate this question:
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- 44.
Which of the following have large receptive fields (more then one answer)
- A.
Back
- B.
Arms
- C.
Legs
- D.
Head
- E.
Fingers
- F.
Toes
Correct Answer(s)
A. Back
C. LegsExplanation
The back and legs have large receptive fields because they contain a higher density of sensory receptors compared to other body parts. This allows them to detect and respond to a wider range of stimuli. The back covers a large surface area, while the legs have numerous sensory receptors distributed along their length. Therefore, these body parts are more sensitive and responsive to external stimuli compared to the arms, head, fingers, and toes.Rate this question:
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- 45.
Which part of the body has high density of receptors
Correct Answer(s)
fingertipsExplanation
The fingertips have a high density of receptors because they are highly sensitive and play a crucial role in our sense of touch. This is due to the presence of numerous sensory receptors, such as mechanoreceptors, which are responsible for detecting pressure, vibration, and texture. The fingertips have a larger representation in the somatosensory cortex of the brain, indicating their importance in tactile perception. Additionally, the fingertips have a higher concentration of nerve endings, making them more responsive to stimuli and allowing us to have a greater level of dexterity and precision in our interactions with the environment.Rate this question:
- 46.
In the fingertips receptive fields are large
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
smallRate this question:
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- 47.
What is the two-point touch system
- A.
Areas where it inversely varies with density of receptors
- B.
Maximum distance at which 2 points of touch can be perceived as seperate
- C.
Measure of tactile acuity or distance between receptive fields
- D.
Minimum distance at which 2 points of touch can be perceived as seperate
Correct Answer
D. Minimum distance at which 2 points of touch can be perceived as seperateExplanation
The two-point touch system refers to the ability to perceive two separate points of touch on the skin. This system is used to measure tactile acuity or the distance between receptive fields. The correct answer states that the two-point touch system is the minimum distance at which two points of touch can be perceived as separate. In other words, it is the smallest distance at which the brain can distinguish between two distinct points of touch on the skin.Rate this question:
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- 48.
What is this " distance between receptive fields"
Correct Answer
tactile acuityExplanation
Tactile acuity refers to the ability to perceive and distinguish fine details through touch. The "distance between receptive fields" is a measure of the density of receptors in the skin, which affects tactile acuity. A smaller distance between receptive fields indicates a higher density of receptors and therefore better tactile acuity.Rate this question:
- 49.
What are the parts of the ear (more then one answer)
- A.
Middle
- B.
Inner
- C.
Pinna
- D.
Exterior
- E.
Outer
- F.
Interior
Correct Answer(s)
A. Middle
B. Inner
E. OuterExplanation
The ear is made up of three main parts: the outer ear, the middle ear, and the inner ear. The outer ear consists of the pinna, which is the visible part of the ear, and the ear canal. The middle ear includes the eardrum and three small bones called the ossicles. These bones transmit sound from the eardrum to the inner ear. The inner ear contains the cochlea, which is responsible for converting sound vibrations into electrical signals that can be interpreted by the brain.Rate this question:
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- 50.
Which parts of the ear are involved with hearing
Correct Answer(s)
outer and middle ear
middle and outer earExplanation
The correct answer is "outer and middle ear". The outer ear consists of the pinna and the ear canal, which collect and direct sound waves towards the middle ear. The middle ear contains the eardrum and three tiny bones called ossicles (hammer, anvil, and stirrup), which transmit and amplify the sound vibrations from the eardrum to the inner ear. Both the outer and middle ear play crucial roles in the process of hearing.Rate this question:
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