Question 1

Which of the following best describes the function of Follicle Stimulating Hormone (FSH) in males?

Accepted Answer

FSH promotes spermatogenesis by acting on Sertoli cells in the testes.

Question 2

Based on hormone composition, which type of hormone is most likely to have its receptor located inside the target cell?

Accepted Answer

Steroid hormone

Question 3

Which of the following best explains why steroid hormones diffuse easily into target cells?

Accepted Answer

Steroid hormones are lipophilic and can pass through the lipid bilayer.

Question 4

A patient with high cortisol levels is likely experiencing which physiological effect?

Accepted Answer

Suppression of the immune response and increased blood glucose

Question 5

Which hormone is primarily responsible for lowering blood calcium levels?

Accepted Answer

Calcitonin

Question 6

Which equation correctly represents the relationship between hormone concentration ($$[H]$$), rate of secretion ($$S$$), and rate of clearance ($$C) in $$the blood?

Accepted Answer

$$[H] = \frac{S}{C}$$

Question 7

A patient presents with polyuria, polydipsia, and unexplained weight loss. Which endocrine disorder is most likely?

Accepted Answer

Diabetes mellitus

Question 8

Which of the following is a second messenger commonly used in G protein-coupled receptor signaling?

Accepted Answer

Cyclic adenosine monophosphate ($$cAMP)$$

Question 9

Which hormone is secreted by the adrenal cortex and is involved in sodium retention and potassium excretion?

Accepted Answer

Aldosterone

Question 10

Which of the following best describes the role of parathyroid hormone (PTH) in calcium homeostasis?

Accepted Answer

PTH stimulates bone resorption and increases blood calcium levels.

Question 11

Which of the following is a major target organ of thyroid hormone?

Accepted Answer

All body cells (systemic effect)

Question 12

Which hormone is released in response to low blood glucose and acts to increase blood glucose levels?

Accepted Answer

Glucagon

Question 13

Which of the following is a characteristic of non-steroid (peptide) hormones?

Accepted Answer

They require second messengers for signal transduction.

Question 14

A patient with excessive ADH secretion is likely to experience which of the following?

Accepted Answer

Hyponatremia due to water retention

Question 15

Which of the following best describes the process of down-regulation of hormone receptors?

Accepted Answer

Decrease in the number of hormone receptors in response to high hormone levels

Question 16

Which of the following is a direct effect of growth hormone?

Accepted Answer

Stimulation of protein synthesis and cell growth

Question 17

Which hormone is primarily responsible for the 'fight or flight' response?

Accepted Answer

Epinephrine

Question 18

Which of the following best explains the difference between endocrine and exocrine glands?

Accepted Answer

Endocrine glands secrete hormones directly into the bloodstream; exocrine glands secrete substances into ducts.

Question 19

Which of the following is a common second messenger in hormone signaling pathways?

Accepted Answer

Calcium ions ($$Ca^{2+})$$

Question 20

A patient with low parathyroid hormone (PTH) levels is most likely to experience which of the following?

Accepted Answer

Hypocalcemia

Endocrine System: Hormones, Mechanisms, and Regulation – Study Guide

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