Bio 30 Senses
This exam is to learn and understand the senses in the body.
Questions and Answers
- 1.
When adaptation of the eye occurs to view objects in a dark room,
- A.
The pupil increases in size and the rods become active
- B.
The pupil decreases in size and the rods become more active
- C.
The pupil increases in size and the cones become active
- D.
The pupil decreases in size and the cones become active
Correct Answer
A. The pupil increases in size and the rods become activeExplanation
In a dark room, the adaptation of the eye occurs to enhance vision in low light conditions. The pupil increases in size in order to allow more light to enter the eye. This is because the rods, which are responsible for detecting light and enabling vision in dim lighting, require more light to function effectively. Therefore, the increased size of the pupil ensures that more light reaches the rods, allowing them to become active and improve vision in the dark.Rate this question:
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- 2.
Which structure in the ear is associated with dizziness?
- A.
Cochlea
- B.
Semi-circular canals
- C.
Eustachian Tube
- D.
Ossicles
Correct Answer
B. Semi-circular canalsExplanation
The semi-circular canals in the ear are associated with dizziness. These canals are filled with fluid and are responsible for detecting rotational movements of the head. When the head moves, the fluid in the canals also moves, sending signals to the brain to help maintain balance. If there is an issue with the fluid movement or the signals sent to the brain, it can result in dizziness or vertigo.Rate this question:
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- 3.
The auditory nerve conducts impulses to the cerebrum from the
- A.
Cochlea
- B.
Ear drum
- C.
Eustachian tube
- D.
Semi-Circular Canals
Correct Answer
A. CochleaExplanation
The auditory nerve is responsible for transmitting sound information from the cochlea to the brain. The cochlea is a spiral-shaped, fluid-filled structure in the inner ear that converts sound vibrations into electrical signals. These signals are then sent to the brain via the auditory nerve, allowing us to perceive and interpret sound. The other options, such as the ear drum, Eustachian tube, and semi-circular canals, are not directly involved in transmitting sound signals to the brain.Rate this question:
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- 4.
The ear structure that converts the mechanical energy of sound to nerve impulses is the,
- A.
Organ of Corti
- B.
Eustachian Tube
- C.
Tympanic Membrane
- D.
Stirrup
Correct Answer
A. Organ of CortiExplanation
The Organ of Corti is the correct answer because it is the structure in the ear that is responsible for converting the mechanical energy of sound into nerve impulses. It is located in the cochlea of the inner ear and contains specialized hair cells that are stimulated by sound vibrations. These hair cells then send electrical signals to the brain through the auditory nerve, allowing us to perceive and interpret sound. The Eustachian Tube helps equalize pressure in the middle ear, the Tympanic Membrane (eardrum) vibrates in response to sound waves, and the Stirrup is one of the three tiny bones in the middle ear that transmit sound vibrations.Rate this question:
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- 5.
The main function of the Eustachian Tube is to
- A.
Drain fluid from the middle ear
- B.
Conduct sound waves to eardrum
- C.
Maintain equal air pressure on the eardrum
- D.
Maintain low pressure in innner ear
Correct Answer
C. Maintain equal air pressure on the eardrumExplanation
The Eustachian Tube is a small passage that connects the middle ear to the back of the throat. Its main function is to maintain equal air pressure on the eardrum. This is important because changes in air pressure can cause discomfort and affect hearing. The Eustachian Tube opens and closes to allow air to flow in and out of the middle ear, equalizing the pressure and preventing damage to the eardrum.Rate this question:
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- 6.
The sensory cells for detecting acceleration of the human body are located in the
- A.
Semi circular canals
- B.
Organ of corti
- C.
Cerebellum
- D.
Cochlea
Correct Answer
A. Semi circular canalsExplanation
The sensory cells for detecting acceleration of the human body are located in the semi-circular canals. These canals are part of the inner ear and are responsible for detecting rotational movements of the head. They contain hair cells that are sensitive to changes in fluid movement caused by acceleration. When the head moves, the fluid in the semi-circular canals also moves, bending the hair cells and sending signals to the brain to perceive acceleration. The organ of Corti is responsible for hearing, the cerebellum is involved in coordination and balance, and the cochlea is responsible for detecting sound.Rate this question:
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- 7.
_________ equilibrium is detected by the semi circular canals while gravitational equilibrium is detected by the utricle/saccule of the vestibule of the inner ear.
Correct Answer
rotational, RotationalExplanation
The equilibrium detected by the semi-circular canals is rotational equilibrium, as these canals are responsible for detecting changes in angular acceleration and deceleration. On the other hand, the utricle/saccule of the vestibule detect gravitational equilibrium, which refers to the detection of changes in linear acceleration and the orientation of the head with respect to gravity.Rate this question:
- 8.
Changing the focus of the eye for viewing nearby objects to viewing distant objects involves changing the shape of the
- A.
Cornea
- B.
Pupil
- C.
Iris
- D.
Lens
Correct Answer
D. LensExplanation
When viewing nearby objects, the eye needs to focus by increasing its refractive power. This is achieved by the lens changing its shape, becoming thicker and more rounded. This allows the lens to bend incoming light rays more sharply, ensuring that they converge on the retina to form a clear image. When viewing distant objects, the lens needs to decrease its refractive power. It does this by becoming flatter and thinner, allowing light rays to converge less sharply and ensuring that the image is focused on the retina. Therefore, changing the focus of the eye for viewing nearby objects to viewing distant objects involves changing the shape of the lens.Rate this question:
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- 9.
The sensory nerves of the inner ear carries impulses from ______ receptors.
- A.
Sight
- B.
Sound
- C.
Hearing
- D.
Ocular
Correct Answer
B. SoundExplanation
The sensory nerves of the inner ear carry impulses from sound receptors. These receptors are responsible for detecting and transmitting auditory signals to the brain. The inner ear contains specialized structures such as the cochlea, which is responsible for converting sound vibrations into electrical signals that can be interpreted by the brain. Therefore, the correct answer is sound.Rate this question:
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- 10.
A blindfolded acrobat performing on a tightrope depends on balance MAINLY from the
- A.
cerebellum and semicircular canals
- B.
Cerebral cortex
- C.
Cerebellum and Eustachian tube
- D.
Cochlea
Correct Answer
A. cerebellum and semicircular canalsExplanation
The cerebellum and semicircular canals are responsible for balance in the body. The cerebellum receives sensory information from the semicircular canals, which are located in the inner ear and detect changes in head position and movement. This information is then processed by the cerebellum to coordinate muscle movements and maintain balance. Therefore, a blindfolded acrobat performing on a tightrope would rely mainly on the cerebellum and semicircular canals for balance.Rate this question:
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- 11.
Another mechanoreceptor found in muscles, tendons and joints. Also send information to the brain about body position.
Correct Answer
ProprioceptorExplanation
Proprioreceptors are mechanoreceptors found in muscles, tendons, and joints. They play a crucial role in sending information to the brain about body position. This allows us to have a sense of where our body parts are in relation to each other and helps with coordination and movement. Proprioreceptors are responsible for providing feedback to the brain regarding muscle tension, joint angle, and the position of body parts, which is essential for maintaining balance and performing precise movements.Rate this question:
- 12.
The structure responsible for accomodation?
Correct Answer
lensExplanation
The lens is responsible for accommodation, which refers to the ability of the eye to change its focus in order to see objects at different distances clearly. The lens accomplishes this by changing its shape, becoming thicker or thinner as needed to bend incoming light rays and focus them onto the retina at the back of the eye. This adjustment allows for clear vision at varying distances, making the lens a crucial component in the process of accommodation.Rate this question:
- 13.
The structure that captures stray light rays is
Correct Answer
choriodExplanation
The choroid is the structure that captures stray light rays. The choroid is a layer of tissue located between the retina and the sclera in the eye. It contains a network of blood vessels that supply oxygen and nutrients to the retina. Additionally, the dark pigment in the choroid helps to absorb any stray light rays that enter the eye, preventing them from scattering and causing visual disturbances.Rate this question:
- 14.
What is the structure responsible for acuity of the image?
Correct Answer
lensExplanation
The lens is responsible for the acuity of the image. It helps to focus the incoming light onto the retina, allowing for clear and sharp vision. By adjusting its shape, the lens can change the focal length and focus on objects at different distances. This ability to focus light precisely onto the retina is crucial for achieving clear and detailed vision.Rate this question:
- 15.
Photoreception is by the layer called?
Correct Answer
retinaExplanation
The correct answer is retina. The retina is a layer of tissue located at the back of the eye that contains specialized cells called photoreceptors. These photoreceptors, known as rods and cones, are responsible for detecting and converting light into electrical signals that can be interpreted by the brain. This process of photoreception is crucial for vision and allows us to perceive the visual world around us.Rate this question:
- 16.
An astigmatism is due to the uneven curvature of the?
Correct Answer
corneaExplanation
Astigmatism is a condition that causes blurred vision due to the uneven curvature of the cornea. The cornea is the clear, dome-shaped front surface of the eye that helps to focus light onto the retina. In a normal eye, the cornea is evenly curved, allowing light to focus properly. However, in astigmatism, the cornea is curved more in one direction than the other, resulting in distorted or blurry vision. This uneven curvature of the cornea causes light to be focused at multiple points instead of a single point on the retina, leading to visual abnormalities.Rate this question:
- 17.
A high density of cones is found in the structure?
Correct Answer
fovea centralisExplanation
The fovea centralis is a small, specialized area in the retina of the eye that contains a high density of cones. Cones are photoreceptor cells responsible for color vision and visual acuity. They are highly concentrated in the fovea centralis, which allows for sharp and detailed central vision. This area is crucial for tasks that require precise visual discrimination, such as reading, driving, and recognizing faces.Rate this question:
- 18.
Regulating the amount of light entering the eye is the?
Correct Answer
irisExplanation
The iris is responsible for regulating the amount of light that enters the eye. It is a colored, circular muscle located behind the cornea. The iris contains a central opening called the pupil, which can constrict or dilate in response to changes in light intensity. When there is bright light, the iris constricts, making the pupil smaller to reduce the amount of light entering the eye. In dim light, the iris dilates, making the pupil larger to allow more light to enter. Therefore, the iris plays a crucial role in adjusting the amount of light that reaches the retina for optimal vision.Rate this question:
- 19.
The region of the brain that interprets the nerve impulses from rods and cones is?
Correct Answer
occipital lobeExplanation
The region of the brain that interprets the nerve impulses from rods and cones is the occipital lobe, specifically the primary visual cortex. The primary visual cortex is also known as V1 or the striate cortex, and it is located at the back of the brain in the occipital lobe. This area processes visual information received from the retina via the optic nerve, allowing us to perceive and interpret visual stimuli.Rate this question:
- 20.
Changing the shape of the lens is by the _____ & _____ ?
Correct Answer
ciliary muscle and suspensory ligaments
ciliary muscle, suspensory ligaments
suspensory ligaments, ciliary muscle
suspensory ligaments and ciliary muscleExplanation
The ciliary muscle and suspensory ligaments are responsible for changing the shape of the lens.Rate this question:
- 21.
Another name for nearsightedness?
Correct Answer
myopiaExplanation
Myopia is another term used to describe nearsightedness. It is a common refractive error where objects up close appear clear, but objects in the distance appear blurry. This occurs when the eyeball is slightly longer than normal or the cornea is too curved, causing light to focus in front of the retina instead of directly on it. People with myopia may have difficulty seeing things far away, such as road signs or a whiteboard in a classroom, but can see objects up close clearly.Rate this question:
- 22.
Farsightedness is when the the image is being focused _________ the retina
Correct Answer
behindExplanation
Farsightedness, also known as hyperopia, occurs when the image of an object is focused behind the retina instead of directly on it. This happens because the eyeball is shorter than normal or the cornea is not curved enough. As a result, the light entering the eye is not properly bent and focused, leading to a blurred image of close objects. To correct farsightedness, convex lenses are used to help focus the image directly on the retina, allowing for clear vision at all distances.Rate this question:
- 23.
The light absorbing pigment found in rods is ______ ?
Correct Answer
rhodopsinExplanation
Rhodopsin is the correct answer because it is the light-absorbing pigment found in the rods of the retina. Rods are responsible for vision in low light conditions and rhodopsin plays a crucial role in this process. When light enters the eye, it is absorbed by rhodopsin, which then triggers a series of chemical reactions that ultimately result in the transmission of visual signals to the brain. Therefore, rhodopsin is essential for our ability to see in dimly lit environments.Rate this question:
- 24.
Nearsightedness is charaterized by a ______ eyeball?
Correct Answer
longExplanation
Nearsightedness is characterized by a long eyeball. When the eyeball is longer than normal, it causes the light entering the eye to focus in front of the retina instead of directly on it. This results in distant objects appearing blurry, while close objects can still be seen clearly. Correcting nearsightedness often involves the use of concave lenses to help focus the light properly onto the retina, allowing for clearer vision of distant objects.Rate this question:
- 25.
Receptors for hot and cold are known as?
Correct Answer
thermoreceptors
thermoreceptorExplanation
The correct answer is "thermoreceptors." Thermoreceptors are sensory receptors that detect and respond to changes in temperature. They are responsible for detecting both hot and cold stimuli and transmitting this information to the brain, allowing us to perceive and respond to temperature changes in our environment.Rate this question:
- 26.
The bone ossicles; the hammer, anvil & stirrup are also known respectively as _______, _______ & _______.
Correct Answer
malleus,incus,stapes
malleus, incus, stape
malleus, incus, stapesExplanation
The bone ossicles; the hammer, anvil, and stirrup are also known respectively as malleus, incus, and stapes.Rate this question:
- 27.
The sense of balance is primarily controlled by the __________ in the inner ear.
Correct Answer
Vestibular system, vestibular systemExplanation
The vestibular system, located in the inner ear, is responsible for maintaining balance and spatial orientation. It detects changes in head position and movement through structures like the semicircular canals and otolith organs. The information is then sent to the brain to help coordinate balance and posture.Rate this question:
- 28.
The part of the eye responsible for detecting light and converting it into neural signals is the __________.
Correct Answer
Retina, retinaExplanation
The retina is the light-sensitive layer at the back of the eye that detects light and converts it into neural signals. These signals are then transmitted to the brain via the optic nerve, allowing us to see. The retina contains photoreceptor cells, namely rods and cones, which play a crucial role in vision.Rate this question:
- 29.
The utricle and saccule are located in the __________ and contain granules called _________ which are made of calcium carbonate.
Correct Answer
vestibule,otoliths
vestibule and otoliths
vestibule, otoliths
otoliths and vestibuleExplanation
The utricle and saccule are located in the vestibule and contain granules called otoliths which are made of calcium carbonate.Rate this question:
- 30.
Sensory reception differs from sensory sensation in that sensory sensation depends upon
- A.
The light energy that stimulates the photoreceptors of the eye
- B.
The brain area that recieves the neural impulse
- C.
Numerous motor neurons that send impulses to the brain
- D.
The mechanical energy that stimulates pressure receptors
Correct Answer
B. The brain area that recieves the neural impulseExplanation
Sensory reception refers to the process of detecting stimuli from the environment, while sensory sensation is the perception or awareness of those stimuli. Sensory sensation depends upon the brain area that receives the neural impulse because it is in the brain where the sensory information is processed and interpreted. The brain receives the neural impulses from the sensory receptors in order to create the sensation of the stimulus. Therefore, the correct answer is the brain area that receives the neural impulse.Rate this question:
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- 31.
Sensory reception differs from sensory sensation in that sensory reception depends upon
- A.
The spinal cord interpreting the impulses from pain receptors when one steps on a tack
- B.
The stimulation of specialized nerve endings and cells in the eye,ear,tongue,nose
- C.
The optic lobe of the cerebrun interpreting impulses from the eye
- D.
The stimulation of co2 receptors located in the vena cava
Correct Answer
B. The stimulation of specialized nerve endings and cells in the eye,ear,tongue,noseExplanation
Sensory reception refers to the process of detecting and receiving sensory information from the environment through specialized nerve endings and cells in the eye, ear, tongue, and nose. This information is then transmitted to the brain for interpretation and processing. On the other hand, sensory sensation refers to the conscious experience or perception of the sensory information. Therefore, sensory reception is dependent on the stimulation of specialized nerve endings and cells in the sensory organs, while sensory sensation is the result of the brain interpreting and processing these impulses.Rate this question:
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- 32.
Sensory adaptation occurs when the brain filters out repetitious and/or insignificant information. The correct example of sensory adaptation is
- A.
A person who inadvertently burns the tip of his or her tongue while drinking a hot drink can still consume beverages
- B.
A chef discriminates the aroma from prepared dishes as he uses exotic spices from around the world
- C.
A wine taster can differentiate the unique taste among various blended wines given to him to evaluate
- D.
A hog farmer does not notice the barn smell from his working boots when he leaves them in the porch of the house
Correct Answer
D. A hog farmer does not notice the barn smell from his working boots when he leaves them in the porch of the houseExplanation
Sensory adaptation refers to the brain's ability to filter out repetitive or insignificant information. In the given example, a hog farmer does not notice the barn smell from his working boots when he leaves them on the porch. This is because the farmer has become accustomed to the smell over time, and his brain has filtered it out as insignificant information. This demonstrates sensory adaptation as the brain is ignoring a repetitive and nonessential sensory input.Rate this question:
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