Question 1

Which of the following organs is classified as having a primary endocrine function, rather than a secondary one?

Accepted Answer

Thyroid gland

Question 2

A patient presents with symptoms of hypercalcemia. Which hormone is most likely underproduced, and from which gland?

Accepted Answer

Parathyroid hormone (PTH) from the parathyroid glands

Question 3

Which hormone is released by the posterior pituitary and is responsible for water reabsorption in the kidneys?

Accepted Answer

Antidiuretic hormone (ADH)

Question 4

Steroid hormones, such as estrogen, exert their effects by binding to receptors located in which part of the target cell?

Accepted Answer

Cytoplasm or nucleus

Question 5

Which of the following is a peptide hormone released by the anterior pituitary that stimulates growth and cell reproduction?

Accepted Answer

Growth hormone (GH)

Question 6

Amino acid derivative hormones include catecholamines, which are produced by which gland?

Accepted Answer

Adrenal medulla

Question 7

Which hormone is secreted in response to low blood glucose and acts to increase glucose levels by stimulating glycogen breakdown?

Accepted Answer

Glucagon

Question 8

The hypothalamus integrates the nervous and endocrine systems by which of the following mechanisms?

Accepted Answer

Synthesizing hormones released by the posterior pituitary

Question 9

Which of the following best describes the negative feedback mechanism in endocrine regulation?

Accepted Answer

A hormone inhibits the release of its stimulating hormone

Question 10

A patient with Type 2 diabetes has normal insulin production but elevated blood glucose. What is the most likely explanation?

Accepted Answer

Peripheral cells are resistant to insulin

Question 11

Which hormone is responsible for stimulating the adrenal cortex to release glucocorticoids?

Accepted Answer

Adrenocorticotropic hormone (ACTH)

Question 12

Which of the following is a lipid derivative hormone that acts as a local signaling molecule?

Accepted Answer

Prostaglandin E (eicosanoid)

Question 13

Which hormone is secreted by the pineal gland and regulates circadian rhythms?

Accepted Answer

Melatonin

Question 14

Which of the following best describes the effect of parathyroid hormone (PTH) on calcium homeostasis?

Accepted Answer

PTH increases calcium reabsorption in the kidneys

Question 15

Which hormone is released by the anterior pituitary and stimulates the thyroid gland to produce thyroid hormones?

Accepted Answer

Thyroid-stimulating hormone (TSH)

Question 16

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

Accepted Answer

Chronic breakdown of lipids and proteins for energy

Question 17

Which hormone is produced by pancreatic beta cells and lowers blood glucose levels?

Accepted Answer

Insulin

Question 18

Which of the following hormones is classified as an amino acid derivative and is involved in sympathetic nervous system activation?

Accepted Answer

Epinephrine

Question 19

Which of the following best describes the role of the hypophyseal portal system?

Accepted Answer

It transports hormones from the hypothalamus to the anterior pituitary

Question 20

Which hormone is released in response to increased blood glucose and stimulates glucose uptake by cells?

Accepted Answer

Insulin

The Endocrine System: Structure, Function, and Regulation

Study Guide - Practice Questions