Question 1

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

Accepted Answer

Promotes spermatogenesis in the seminiferous tubules

Question 2

Based on hormone composition, where do steroid hormones typically exert their effects?

Accepted Answer

Inside the nucleus by altering gene transcription

Question 3

Which of the following best defines gluconeogenesis?

Accepted Answer

The synthesis of glucose from non-carbohydrate sources

Question 4

Why do steroid hormones diffuse easily into target cells?

Accepted Answer

They are lipid-soluble and can cross the phospholipid bilayer

Question 5

Which of the following is a correct pathway for the hypothalamic-pituitary-adrenal (HPA) axis?

Accepted Answer

Hypothalamus releases CRH $\rightarrow$ Pituitary releases ACTH $\rightarrow$ Adrenal cortex releases cortisol

Question 6

Which hormone is primarily responsible for lowering blood calcium levels?

Accepted Answer

Calcitonin

Question 7

A patient presents with excessive thirst and urination. Laboratory tests reveal high blood glucose. Which hormone is most likely deficient?

Accepted Answer

Insulin

Question 8

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

Accepted Answer

Presence of specific receptors on the target cell

Question 9

Which equation best represents the relationship between hormone concentration ($[H]$), receptor number ($[R]$), and cellular response ($E$)?

Accepted Answer

$E = [H] 	imes [R]$

Question 10

Which of the following is a second messenger commonly used in hormone signaling?

Accepted Answer

Cyclic adenosine monophosphate (cAMP)

Question 11

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

Accepted Answer

Hypocalcemia

Question 12

Which of the following best explains the effect of antidiuretic hormone (ADH) on the kidneys?

Accepted Answer

Increases water reabsorption in the collecting ducts

Question 13

Which organ is the primary target of thyroid hormone for increasing metabolic rate?

Accepted Answer

All body cells

Question 14

Which of the following is a cardinal sign of diabetes mellitus?

Accepted Answer

Polyuria (excessive urination)

Question 15

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

Accepted Answer

Aldosterone

Question 16

Which of the following best describes the role of glucocorticoids?

Accepted Answer

Increase blood glucose and suppress inflammation

Question 17

Which of the following is a correct example of a non-steroid (peptide) hormone?

Accepted Answer

Insulin

Question 18

Which of the following best explains the mechanism of action for G protein-coupled receptors?

Accepted Answer

Activate second messengers such as cAMP

Question 19

Which of the following is a major target system for growth hormone?

Accepted Answer

Musculoskeletal system

Question 20

A patient is experiencing symptoms of Cushing's syndrome. Which hormone is most likely elevated?

Accepted Answer

Cortisol

Endocrine System: Hormones, Mechanisms, and Physiology Study Guide

Study Guide - Practice Questions