Question 1

Which hormone is produced by the pineal gland and what is its primary function?

Accepted Answer

Melatonin; regulates circadian rhythms

Question 2

A patient presents with low blood calcium levels. Which hormone is most likely to be secreted in response, and from which gland?

Accepted Answer

Parathyroid hormone (PTH) from the parathyroid glands

Question 3

Which of the following hormones is derived from cholesterol?

Accepted Answer

Cortisol

Question 4

Which hormone is released by the posterior pituitary and acts on the kidneys to promote water reabsorption?

Accepted Answer

Antidiuretic hormone (ADH)

Question 5

Which of the following best describes the mechanism of action for peptide hormones?

Accepted Answer

They bind to extracellular receptors and activate second messenger systems such as cAMP.

Question 6

Amino acid derivatives include hormones synthesized from which two amino acids?

Accepted Answer

Tyrosine and tryptophan

Question 7

Which hormone is secreted in response to high blood glucose levels, and what is its effect?

Accepted Answer

Insulin; stimulates glucose uptake by cells

Question 8

Which of the following is a correct pairing of hormone and its primary target tissue?

Accepted Answer

TSH – Thyroid gland

Question 9

Which hormone is responsible for stimulating the release of cortisol from the adrenal cortex?

Accepted Answer

Adrenocorticotropic hormone (ACTH)

Question 10

Which of the following best explains the concept of hormone amplification?

Accepted Answer

A single hormone molecule binding to a receptor can generate thousands of second messengers, greatly magnifying the response.

Question 11

Which hormone is produced by the zona glomerulosa of the adrenal cortex and what is its main effect?

Accepted Answer

Aldosterone; increases sodium reabsorption in the kidneys

Question 12

A patient with a tumor in the anterior pituitary secreting excess growth hormone (GH) would likely experience which of the following?

Accepted Answer

Elevated blood glucose and increased tissue growth

Question 13

Which hormone is released by the heart in response to high blood volume and what is its effect?

Accepted Answer

Atrial natriuretic peptide (ANP); decreases blood volume and blood pressure

Question 14

Which of the following is a permissive hormone interaction?

Accepted Answer

One hormone is needed for another to produce its effect

Question 15

Which hormone is produced by the alpha cells of the pancreas and what is its primary function?

Accepted Answer

Glucagon; increases blood glucose by stimulating glycogen breakdown

Question 16

Which of the following best describes the effect of thyroid hormones on the body?

Accepted Answer

Increase metabolic rate and heat production

Question 17

Which hormone is secreted by the adrenal medulla and what is its primary effect during the alarm phase of the stress response?

Accepted Answer

Epinephrine; mobilizes glucose for immediate energy

Question 18

Which hormone is produced by the kidneys and stimulates red blood cell production?

Accepted Answer

Erythropoietin (EPO)

Question 19

Which hormone is responsible for stimulating ovulation in females and androgen production in males?

Accepted Answer

Luteinizing hormone (LH)

Question 20

Which of the following is a likely consequence of untreated diabetes mellitus?

Accepted Answer

Kidney degeneration, retinal damage, and increased risk of heart attack

The Endocrine System: Structure, Function, and Regulation

Study Guide - Practice Questions