Ch.18 - The Endocrine System
Quiz to study for chapter 18 - the endocrine system.
Questions and Answers
- 1.
___________ occurs between cells of the same type?
- A.
Paracrine Communication
- B.
Endocrine Communication
- C.
Synaptic Communication
- D.
Direct Communication
Correct Answer
D. Direct CommunicationExplanation
Direct communication occurs between cells of the same type. This type of communication involves direct physical contact between adjacent cells, allowing for the transfer of molecules and signals through gap junctions or plasmodesmata. This direct communication is important for coordinating cellular activities and maintaining tissue integrity.Rate this question:
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- 2.
What is the building block of protein?
- A.
Peptide Derivative
- B.
Lipid Derivative
- C.
Amino Acid Derivative
Correct Answer
C. Amino Acid DerivativeExplanation
Amino acids are the building blocks of proteins. Proteins are made up of long chains of amino acids that are linked together by peptide bonds. Each amino acid has a unique side chain, which gives it specific properties and functions. Therefore, the correct answer is amino acid derivative as it correctly identifies the building block of proteins.Rate this question:
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- 3.
Which mechanisms of intercellular communication is also known as local hormones that use chemical messenger to transfer information from cell to cell within a single tissue?
- A.
Paracrine Communication
- B.
Direct Communication
- C.
Synaptic Communication
- D.
Endocrine Communication
Correct Answer
A. Paracrine CommunicationExplanation
Paracrine communication is the correct answer because it refers to the mechanism of intercellular communication where cells release chemical messengers that act on nearby cells within the same tissue. These chemical messengers, known as local hormones, transfer information from one cell to another, allowing for coordination and regulation of cellular activities within a specific tissue. This form of communication is distinct from direct communication, synaptic communication, and endocrine communication, which involve different modes of signaling and target different types of cells or tissues.Rate this question:
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- 4.
Which hormone increases glucose availability for ATP production?
- A.
Norepinephrine
- B.
Epinephrine
- C.
Glucagon
- D.
Insulin
Correct Answer
B. EpinepHrineExplanation
Epinephrine increases glucose availability for ATP production. Epinephrine, also known as adrenaline, is released by the adrenal glands in response to stress or danger. It stimulates the breakdown of glycogen in the liver and muscles, releasing glucose into the bloodstream. This increase in glucose availability allows for the production of ATP, the main energy source for cells. Epinephrine also enhances the breakdown of fats for energy, further supporting ATP production.Rate this question:
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- 5.
ADH is known as ________ and secreted by _________?
- A.
Antidiuretic Hormone & Pituitary Anterior
- B.
Antidiuretic Hormone & Pituitary Posterior
- C.
Aldosterone & Adrenal Cortex
- D.
Adrogens and Adrenal Medulla
Correct Answer
B. Antidiuretic Hormone & Pituitary PosteriorExplanation
ADH, also known as antidiuretic hormone, is a hormone that is secreted by the pituitary posterior. It plays a crucial role in regulating the balance of water in the body by controlling the amount of water reabsorbed by the kidneys. This hormone helps to prevent excessive urine production and dehydration, especially in situations where water intake is limited.Rate this question:
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- 6.
The main control center of the endocrine system is
- A.
Pituitary Gland
- B.
Thyroid Gland
- C.
Hypothalamus
- D.
Adrenal Cortex
Correct Answer
C. HypothalamusExplanation
The hypothalamus is considered the main control center of the endocrine system because it plays a crucial role in regulating hormone production and release. It receives signals from various parts of the body and responds by releasing specific hormones that stimulate or inhibit the release of hormones from the pituitary gland. The hypothalamus also controls the release of hormones from other endocrine glands, such as the thyroid gland and adrenal cortex, by producing releasing or inhibiting factors. Therefore, the hypothalamus acts as a coordinator and regulator of the endocrine system, making it the correct answer.Rate this question:
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- 7.
Which of the following is true?
- A.
Hormones are release at the capillaries
- B.
Hormones bind to target cells when inactivated
- C.
Broken up by enzymes
- D.
Absorb or broken down by the liver and kidney
- E.
All of the above is true
Correct Answer
E. All of the above is trueExplanation
All of the statements given are true. Hormones are released at the capillaries, as they are secreted by endocrine glands into the bloodstream. Hormones bind to target cells when inactivated, as they need to interact with specific receptors on the surface of target cells to exert their effects. Hormones can be broken up by enzymes, which can help regulate their levels in the body. Additionally, hormones can be absorbed or broken down by the liver and kidney, which are important organs involved in the metabolism and elimination of various substances, including hormones. Therefore, all of the statements are correct.Rate this question:
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- 8.
Lipid Derivatives remain in the circulatory longer and are usually ______.
- A.
Fat
- B.
RBC
- C.
WBC
- D.
Steriod
Correct Answer
D. SteriodExplanation
Lipid derivatives, such as steroids, have a longer circulation time because they are highly soluble in lipids and can easily pass through cell membranes. This allows them to be distributed throughout the body and interact with target cells for a longer period of time. Steroids are a specific type of lipid derivative that have various functions in the body, including regulating metabolism, inflammation, and immune responses.Rate this question:
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- 9.
Endocrine reflexes are controlled by
- A.
Negative feed back loop
- B.
Neutral feed back loop
- C.
Positive feed back loop
- D.
Some kind of loop
Correct Answer
A. Negative feed back loopExplanation
Endocrine reflexes are controlled by negative feedback loops. In this type of loop, the output of a system inhibits or reduces the activity of the system itself. In the case of endocrine reflexes, the release of hormones is regulated by feedback mechanisms that sense the level of hormones in the bloodstream. When hormone levels reach a certain threshold, the feedback mechanism signals the endocrine glands to reduce or stop hormone production, maintaining homeostasis. This negative feedback loop helps to regulate hormone levels and prevent excessive or inadequate hormone secretion.Rate this question:
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- 10.
Hypothalamus controls the ______ by releasing hormones and ________.
- A.
Posterior Pituitary & stimulating hormones
- B.
Thyroid gland & inhibiting hormones
- C.
Posterior Pituitary & inhibiting hormones
- D.
Thyroid gland & stimulating hormones
Correct Answer
C. Posterior Pituitary & inhibiting hormonesExplanation
The hypothalamus controls the posterior pituitary by releasing inhibiting hormones. These inhibiting hormones regulate the release of hormones from the posterior pituitary gland, thereby controlling its function.Rate this question:
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- 11.
The pituitary gland is also known as
- A.
Hypophysis
- B.
Hyperphysis
- C.
Hemophysis
Correct Answer
A. HypopHysisExplanation
The correct answer is hypophysis. The pituitary gland is commonly referred to as the hypophysis. It is a small gland located at the base of the brain and is responsible for producing and releasing various hormones that regulate several bodily functions. The term "hyperphysis" and "hemophysis" are not accurate names for the pituitary gland.Rate this question:
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- 12.
Parathyroid secretes _________ which increases blood calcium level.
- A.
Perithyroid Hormone
- B.
Hyperthyroid Hormone
- C.
Parathyroid Hormone
- D.
Thyroid Hormone
Correct Answer
C. Parathyroid HormoneExplanation
The correct answer is Parathyroid Hormone. The parathyroid gland secretes parathyroid hormone (PTH), which plays a crucial role in maintaining calcium homeostasis in the body. PTH acts on the bones, kidneys, and intestines to increase the levels of calcium in the blood. It stimulates the release of calcium from the bones, enhances the reabsorption of calcium in the kidneys, and promotes the absorption of calcium in the intestines. This hormone is essential for regulating calcium levels and ensuring proper functioning of various physiological processes.Rate this question:
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- 13.
The Adrenal Medulla produces 2 hormones that are controlled by
- A.
Central Nervous System
- B.
Peripheral Nervous System
- C.
Sympathetic Nervous System
Correct Answer
C. Sympathetic Nervous SystemExplanation
The Adrenal Medulla produces two hormones, adrenaline and noradrenaline, that are controlled by the Sympathetic Nervous System. This system is responsible for the body's "fight or flight" response, which is triggered in response to stress or danger. When the Sympathetic Nervous System is activated, it stimulates the Adrenal Medulla to release adrenaline and noradrenaline into the bloodstream, preparing the body for immediate action. These hormones increase heart rate, blood pressure, and energy levels, and enhance the body's overall response to stress.Rate this question:
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- 14.
A hormone disorder caused by high levels of cortisol in the blood, also known as Moon Face.
- A.
Addision Disease
- B.
Aldosteronism
- C.
Cushing Disease
- D.
Hyperaldosteronism
Correct Answer
C. Cushing DiseaseExplanation
Cushing's disease is a hormone disorder characterized by elevated levels of cortisol in the blood. This condition can result in various symptoms, including a rounded face known as "Moon Face." Addison's disease is the opposite of Cushing's disease, as it is caused by low cortisol levels. Aldosteronism and hyperaldosteronism are conditions related to the hormone aldosterone, not cortisol. Therefore, the correct answer is Cushing's disease.Rate this question:
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- 15.
Which disease causes cardiac, neural, and kidney failure due to low level of K+?
- A.
Addision Disease
- B.
Aldosteronism
- C.
Cushing Disease
- D.
Hyperaldosteronism
Correct Answer
B. AldosteronismExplanation
Aldosteronism is the correct answer because it is a condition characterized by excess production of aldosterone hormone by the adrenal glands. This hormone is responsible for regulating the balance of potassium (K+) and sodium (Na+) in the body. In aldosteronism, there is an excessive retention of sodium and increased excretion of potassium, leading to low levels of K+. This imbalance can cause cardiac, neural, and kidney failure as potassium is essential for their proper functioning. Addison's disease, Cushing's disease, and hyperaldosteronism are not associated with low levels of K+ and do not cause the same symptoms.Rate this question:
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- 16.
Chief cells is the primary cell of the ______. It produces and secretes _______.
- A.
PT-Gland, PTH
- B.
Adrenal Cortex, Epinephrine
- C.
PT-Gland, Zona Reticularis
- D.
Adrenal Cortex, Zona Reticularis
Correct Answer
A. PT-Gland, PTHExplanation
Chief cells are the primary cells of the parathyroid gland. They produce and secrete parathyroid hormone (PTH).Rate this question:
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- 17.
Melatonin is created by _____ and set _____.
- A.
Pancreas & hormone production
- B.
Parathyroid Gland & calcium homeostatasis
- C.
Pinealocytes & circadian rhythms
Correct Answer
C. Pinealocytes & circadian rhythmsExplanation
Melatonin is a hormone that regulates the sleep-wake cycle and is primarily produced by the pinealocytes in the pineal gland. These cells are responsible for the synthesis and secretion of melatonin in response to darkness, which helps to regulate circadian rhythms. Therefore, the correct answer is Pinealocytes & circadian rhythms.Rate this question:
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- 18.
The Pancreas is located in the.
- A.
Pericardiac
- B.
Diaphragm
- C.
Abdominal Pelvic Cavity
- D.
Transverse Thoracic
Correct Answer
C. Abdominal Pelvic CavityExplanation
The correct answer is "Abdominal Pelvic Cavity" because the pancreas is an organ that is located in the abdominal region of the body. It is situated behind the stomach and in front of the spine. The abdominal pelvic cavity is the space in the body that contains the abdominal organs, including the pancreas. Therefore, this is the most accurate and appropriate location for the pancreas.Rate this question:
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Mar 19, 2023Quiz Edited by
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Dec 09, 2009Quiz Created by
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Endocrine System Practice Test Questions and Answers
Endocrine System Practice Test Questions and Answers
A Quick Practice Test Quiz On The Endocrine System!
A Quick Practice Test Quiz On The Endocrine System!
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