Question 1

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

Accepted Answer

Endocrine glands release hormones into the blood; exocrine glands release products into ducts.

Question 2

A patient has a mutation that prevents their cells from producing receptors for insulin. What is the most likely consequence?

Accepted Answer

Their cells will not respond to insulin, leading to high blood glucose.

Question 3

Which hormone is released in response to low blood calcium, and what is its effect?

Accepted Answer

Parathyroid hormone (PTH); increases blood calcium

Question 4

Which of the following best explains why water-soluble hormones require membrane receptors?

Accepted Answer

They cannot cross the lipid bilayer of the plasma membrane.

Question 5

A person is experiencing chronic stress. Which hormone is most responsible for maintaining energy availability during this period?

Accepted Answer

Cortisol

Question 6

Which of the following is an example of a negative feedback loop in the endocrine system?

Accepted Answer

High blood glucose stimulates insulin release, which lowers blood glucose and reduces further insulin secretion.

Question 7

Which hormone is produced by the hypothalamus but released from the posterior pituitary?

Accepted Answer

Antidiuretic hormone (ADH)

Question 8

A patient with damage to their adrenal medulla would have difficulty with which of the following?

Accepted Answer

Responding rapidly to acute stress (fight-or-flight response)

Question 9

Which hormone is essential for the body's metabolic rate and requires iodine for its synthesis?

Accepted Answer

Thyroid hormone (T3 and T4)

Question 10

Which of the following best describes the role of aldosterone?

Accepted Answer

Promotes sodium retention, which increases water retention and blood pressure

Question 11

A person with untreated diabetes mellitus is likely to experience which combination of symptoms?

Accepted Answer

Polyuria, polydipsia, polyphagia

Question 12

Which hormone is released by the heart and helps reduce blood volume and pressure?

Accepted Answer

Atrial natriuretic peptide (ANP)

Question 13

Which hormone is responsible for stimulating uterine contractions during childbirth and milk ejection during breastfeeding?

Accepted Answer

Oxytocin

Question 14

Which of the following best describes the relationship between insulin and glucagon?

Accepted Answer

They work together to maintain blood glucose homeostasis by having opposing effects.

Question 15

Which hormone is released by the kidneys in response to low oxygen levels and stimulates red blood cell production?

Accepted Answer

Erythropoietin

Question 16

A water-soluble hormone binds to its receptor on the cell membrane. What is the next likely step in the signaling pathway?

Accepted Answer

Activation of an intracellular signaling cascade

Question 17

Which of the following is a correct sequence for the negative feedback regulation of a hormone?

Accepted Answer

Stimulus → hormone released → target responds → original disturbance decreases → hormone secretion decreases

Question 18

Which hormone is primarily responsible for preparing the mammary glands for milk production?

Accepted Answer

Prolactin

Question 19

Which of the following best describes signal amplification in hormone signaling?

Accepted Answer

A single hormone molecule can trigger a large cellular response through a signaling cascade.

Question 20

Which of the following is NOT a major type of stimulus for hormone secretion?

Accepted Answer

Thermal stimulus

Chapter 16: The Endocrine System – Study Notes

스터디 가이드 - 연습 문제