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

Gluconeogenesis is the process of synthesizing glucose from non-carbohydrate sources. Where does this process primarily occur, and what is the role of cortisol?

Accepted Answer

Gluconeogenesis occurs in the liver, and cortisol stimulates the process.

Question 3

Why is thyroid hormone able to diffuse easily into target cells?

Accepted Answer

Because it is an amine hormone with steroid-like properties, making it lipid-soluble.

Question 4

Which hormone-receptor complex interacts directly with the cell's DNA to regulate gene expression?

Accepted Answer

Steroid hormone-receptor complex

Question 5

Which is the only amine hormone that acts like a steroid, entering cells and binding to intracellular receptors?

Accepted Answer

Thyroxine (T4)

Question 6

Oxytocin is released during childbirth and stimulates uterine contractions. What type of feedback mechanism is this an example of?

Accepted Answer

Positive feedback

Question 7

Which of the following best describes the hypophyseal portal system?

Accepted Answer

A network of blood vessels connecting the hypothalamus and anterior pituitary.

Question 8

What is the primary function of aldosterone in the body?

Accepted Answer

Regulation of water and electrolyte balance by increasing sodium reabsorption in the kidneys.

Question 9

Which of the following is a factor required for target cell activation by hormone-receptor interaction?

Accepted Answer

The concentration of the hormone, number of receptors, and affinity between hormone and receptor.

Question 10

Down-regulation of a receptor occurs when:

Accepted Answer

The number of receptors decreases due to prolonged exposure to high hormone concentrations.

Question 11

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

Accepted Answer

PTH increases blood calcium levels by stimulating osteoclasts to break down bone.

Question 12

Which of the following is a correct definition of ACTH and its regulation?

Accepted Answer

ACTH (Adrenocorticotropic hormone) stimulates the adrenal cortex and is regulated by CRH from the hypothalamus.

Question 13

Eicosanoids are best described as:

Accepted Answer

Local signaling molecules derived from arachidonic acid.

Question 14

Which of the following statements about leptin is correct?

Accepted Answer

Leptin is produced by adipose tissue and regulates appetite.

Question 15

Which of the following best differentiates mineralocorticoids from glucocorticoids?

Accepted Answer

Mineralocorticoids regulate water and electrolyte balance, while glucocorticoids regulate metabolism and stress response.

Question 16

Atrial Natriuretic Peptide (ANP) is produced by which structure, and what is its primary function?

Accepted Answer

ANP is produced by the heart and decreases blood pressure by promoting sodium excretion.

Question 17

Which of the following best explains how hormones target cells?

Accepted Answer

Hormones bind to specific receptors on or in target cells, initiating a cellular response.

Question 18

Alcohol consumption affects antidiuretic hormone (ADH) in which way?

Accepted Answer

Alcohol inhibits ADH secretion, resulting in increased urine output.

Question 19

Which of the following best describes the role of the thymus gland in the immune system?

Accepted Answer

The thymus gland is the site of T lymphocyte maturation, essential for adaptive immunity.

Anatomy & Physiology Endocrine System Study Guide

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