Question 1

Which of the following best describes the primary difference between endocrine and exocrine glands?

Accepted Answer

Endocrine glands secrete hormones directly into the bloodstream, while exocrine glands secrete substances into ducts.

Question 2

A patient presents with symptoms of hypothyroidism. Which hormone is most likely deficient, and which gland is primarily responsible for its secretion?

Accepted Answer

Thyroxine ($$T_4$$); thyroid gland

Question 3

Which of the following hormones is secreted by the posterior pituitary and is responsible for stimulating uterine contractions during labor?

Accepted Answer

Oxytocin

Question 4

A person is experiencing high blood glucose levels. Which hormone is released to lower blood glucose, and what is its primary target tissue?

Accepted Answer

Insulin; skeletal muscle and adipose tissue

Question 5

Which of the following best explains how steroid hormones differ from peptide hormones in their mechanism of action?

Accepted Answer

Steroid hormones bind to intracellular receptors and alter gene expression, while peptide hormones bind to cell surface receptors and activate second messengers.

Question 6

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

Accepted Answer

Epinephrine

Question 7

A patient has low calcium levels in the blood. Which hormone is released to correct this imbalance, and what is one of its main actions?

Accepted Answer

Parathyroid hormone; stimulates osteoclast activity to release calcium from bone

Question 8

Which of the following correctly matches the hormone with its primary function?

Accepted Answer

Luteinizing hormone (LH): triggers ovulation in females

Question 9

Which hormone is primarily responsible for regulating the body's metabolic rate?

Accepted Answer

Thyroxine ($$T_4)$$

Question 10

A patient with a tumor in the anterior pituitary is producing excess growth hormone. Which of the following is a likely consequence in an adult?

Accepted Answer

Acromegaly

Question 11

Which of the following best describes the feedback mechanism that regulates most hormone secretion?

Accepted Answer

Negative feedback, where increased hormone levels inhibit further secretion

Question 12

Which hormone is secreted by the pancreas and raises blood glucose levels?

Accepted Answer

Glucagon

Question 13

Which of the following is a function of the epididymis in the male reproductive system?

Accepted Answer

Storage and maturation of sperm

Question 14

During the menstrual cycle, which hormone surge triggers ovulation?

Accepted Answer

Luteinizing hormone (LH)

Question 15

Which of the following best describes the role of the hypothalamus in endocrine regulation?

Accepted Answer

It produces releasing and inhibiting hormones that control the anterior pituitary.

Question 16

Which hormone is primarily responsible for stimulating the development of male secondary sexual characteristics?

Accepted Answer

Testosterone

Question 17

A patient is diagnosed with Addison's disease, which involves insufficient secretion of adrenal cortex hormones. Which hormone is most likely deficient?

Accepted Answer

Aldosterone

Question 18

Which of the following is the correct sequence of structures that sperm pass through from the testes to the outside of the body?

Accepted Answer

Seminiferous tubules → epididymis → vas deferens → urethra

Question 19

Which hormone is secreted by the corpus luteum and is essential for maintaining the uterine lining during early pregnancy?

Accepted Answer

Progesterone

Question 20

Which hormone is released in response to low blood sodium and acts on the kidneys to increase sodium reabsorption?

Accepted Answer

Aldosterone

Endocrine and Reproductive Systems: Study Guide for Anatomy & Physiology

Study Guide - Practice Questions

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