Question 1

Which of the following best describes the location of the pineal gland in the human brain?

Accepted Answer

Inferior and posterior to the thalamus

Question 2

Melatonin secretion from the pineal gland is primarily stimulated by which environmental factor?

Accepted Answer

Decreased light levels detected by the retina

Question 3

Which hormone is secreted by the pineal gland and is derived from serotonin?

Accepted Answer

Melatonin

Question 4

A patient with a pineal gland tumor is experiencing insomnia. Which function of melatonin is most likely disrupted?

Accepted Answer

Regulation of circadian rhythms

Question 5

Which of the following organs is NOT correctly matched with its endocrine product?

Accepted Answer

Heart – erythropoietin

Question 6

Which pathway correctly describes the signal transduction for melatonin release?

Accepted Answer

Light stimulates retina $$\rightarrow$$ SCN $$\rightarrow$$ spinal cord $$\rightarrow$$ pineal gland

Question 7

Which hormone is produced by the heart and helps regulate blood pressure by promoting sodium excretion?

Accepted Answer

Atrial natriuretic peptide (ANP)

Question 8

A deficiency in melatonin production may result in which of the following clinical symptoms?

Accepted Answer

Insomnia

Question 9

Which of the following tissues produces hormones that regulate appetite and energy balance?

Accepted Answer

Adipose tissue

Question 10

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

Accepted Answer

Erythropoietin

Question 11

Which hormone is secreted by the placenta and is essential for maintaining pregnancy?

Accepted Answer

Human chorionic gonadotropin (hCG)

Question 12

Which of the following best explains why melatonin levels rise in the evening?

Accepted Answer

Decreased light input to the retina reduces inhibition of melatonin secretion

Question 13

Which hormone is produced by the skin and is important for calcium homeostasis?

Accepted Answer

Cholecalciferol (vitamin D)

Question 14

A patient with a mutation in the suprachiasmatic nucleus (SCN) would most likely experience which of the following?

Accepted Answer

Disrupted circadian rhythms

Question 15

Which hormone is secreted by the stomach and stimulates acid secretion?

Accepted Answer

Gastrin

Question 16

Which hormone is secreted by the small intestine and stimulates the release of bile from the gallbladder?

Accepted Answer

Cholecystokinin

Question 17

Which of the following is a correct sequence of hormone production and target action involving the kidneys?

Accepted Answer

Kidneys produce erythropoietin $$\rightarrow$$ stimulates red bone marrow $$\rightarrow$$ increases red blood cell production

Question 18

Which hormone is secreted by adipose tissue and is involved in regulating satiety?

Accepted Answer

Leptin

Question 19

Which of the following best describes the effect of melatonin on the sleep-wake cycle?

Accepted Answer

Melatonin promotes sleep by increasing in the evening as light levels decline

Endocrine System: Other Organs and Tissues (Chapter 17, Part 5)

Study Guide - Practice Questions