Question 1

Which of the following best describes the primary function of the endocrine system in maintaining homeostasis?

Accepted Answer

It secretes hormones into the bloodstream to regulate activities of cells and organs throughout the body.

Question 2

Which hormone is released by the posterior pituitary and is responsible for stimulating uterine contractions during childbirth?

Accepted Answer

Oxytocin

Question 3

A patient presents with symptoms of dehydration and excessive urination. Which hormone deficiency is most likely responsible?

Accepted Answer

Antidiuretic hormone (ADH)

Question 4

Which of the following is a steroid hormone that regulates sodium and potassium balance by acting on the kidneys?

Accepted Answer

Aldosterone

Question 5

Which mechanism describes how lipid-soluble hormones typically exert their effects on target cells?

Accepted Answer

Direct gene activation by binding to intracellular receptors

Question 6

A person with hypersecretion of growth hormone during childhood is likely to develop which condition?

Accepted Answer

Gigantism

Question 7

Which hormone is produced by the pancreas and lowers blood glucose levels by promoting cellular uptake of glucose?

Accepted Answer

Insulin

Question 8

Which of the following best explains the role of the hypothalamus in endocrine system control?

Accepted Answer

It produces releasing and inhibiting hormones that regulate the anterior pituitary gland.

Question 9

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

Accepted Answer

Parathyroid hormone (PTH)

Question 10

A patient with Cushing's syndrome is likely to have which of the following symptoms?

Accepted Answer

Moon face, loss of muscle and bone protein, and hypertension

Question 11

Which hormone is secreted by the adrenal medulla and is responsible for the 'fight or flight' response?

Accepted Answer

Epinephrine

Question 12

Which of the following is a function of glucagon?

Accepted Answer

Stimulates glycogen breakdown in the liver to increase blood glucose

Question 13

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

Accepted Answer

Decreases urine output by promoting water reabsorption

Question 14

Which hormone is responsible for stimulating the thyroid gland to release thyroid hormones?

Accepted Answer

Thyroid-stimulating hormone (TSH)

Question 15

A patient with Addison's disease is likely to have which of the following symptoms?

Accepted Answer

Low plasma glucose, dehydration, and bronze skin

Question 16

Which of the following is a peptide hormone that stimulates milk production in the mammary glands?

Accepted Answer

Prolactin

Question 17

Which of the following best describes the mechanism of action for most amino acid-based hormones?

Accepted Answer

They bind to cell surface receptors and activate second messenger systems such as $$cAMP.$$

Question 18

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

Accepted Answer

Melatonin

Question 19

Which of the following is a major effect of thyroid hormones ($$T_3$$ and $$T_4) on $$the body?

Accepted Answer

Increase metabolic rate and regulate tissue growth and development

Question 20

A patient with hyposecretion of insulin is most likely to develop which condition?

Accepted Answer

Diabetes mellitus

The Endocrine System: Structure, Function, and Disorders

Study Guide - Practice Questions