Question 1

Which of the following best describes the main difference in the mechanism of signal transmission between the nervous system and the endocrine system?

Accepted Answer

The nervous system uses action potentials and neurotransmitters for rapid, localized signaling, while the endocrine system uses hormones for slower, widespread signaling.

Question 2

A hormone is released into the bloodstream and affects distant target cells. This type of signaling is best described as:

Accepted Answer

Endocrine

Question 3

Which of the following is a steroid hormone?

Accepted Answer

Cortisol

Question 4

Why do steroid hormones require transport proteins in the blood?

Accepted Answer

Steroid hormones are lipid-soluble and do not dissolve readily in plasma, so they require transport proteins for distribution.

Question 5

Which hormone is released by the posterior pituitary gland?

Accepted Answer

Oxytocin

Question 6

A patient has low levels of thyroid hormone (T3/T4). Which hormone from the anterior pituitary is most likely also low?

Accepted Answer

Thyroid Stimulating Hormone (TSH)

Question 7

Which of the following best explains why second messenger systems can produce large cellular responses to small amounts of hormone?

Accepted Answer

Second messenger systems amplify the signal at multiple steps, so one hormone molecule can activate many intracellular molecules.

Question 8

Which of the following is NOT a hormone released by the anterior pituitary?

Accepted Answer

Oxytocin

Question 9

Which hormone is derived from tryptophan and helps regulate circadian rhythms?

Accepted Answer

Melatonin

Question 10

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

Accepted Answer

It carries tropic hormones directly from the hypothalamus to the anterior pituitary.

Question 11

Which of the following is a correct pairing of hormone and its primary function?

Accepted Answer

Insulin – lowers blood sugar

Question 12

A signaling cascade using cAMP as a second messenger is initiated by which enzyme?

Accepted Answer

Adenylate cyclase

Question 13

Which of the following statements about hormone receptors is correct?

Accepted Answer

Amino acid-based hormone receptors are typically found on the cell membrane.

Question 14

Which hormone is released in response to stress and increases blood glucose levels?

Accepted Answer

Cortisol

Question 15

Which of the following best describes the difference between paracrine and autocrine signaling?

Accepted Answer

Paracrine signals affect nearby cells, while autocrine signals affect the cell that released them.

Question 16

Which of the following hormones is produced by the pineal gland?

Accepted Answer

Melatonin

Question 17

Which of the following best explains why the effects of the endocrine system are generally longer-lasting than those of the nervous system?

Accepted Answer

Hormones remain in the bloodstream longer than neurotransmitters remain in the synaptic cleft.

Question 18

Which of the following is a tropic hormone released by the anterior pituitary?

Accepted Answer

Thyroid stimulating hormone (TSH)

Question 19

Which of the following best describes the pathway for the release of cortisol in response to stress?

Accepted Answer

Hypothalamus → Pituitary gland → Adrenal cortex → Cortisol

Question 20

Which of the following is true regarding the specificity of hormone action?

Accepted Answer

Only cells with the appropriate receptor for a hormone will respond to that hormone.

Study Guide: Introduction to the Endocrine System (ANP)

Study Guide - Practice Questions

Study Guide - Flashcards