Question 1

Which of the following best describes the primary difference between the nervous system and the endocrine system in terms of internal communication?

Accepted Answer

The nervous system uses electrical/chemical signals (action potentials and neurotransmitters), while the endocrine system uses hormones as chemical messengers.

Question 2

Which of the following is an example of a hormone interaction with a synergistic effect?

Accepted Answer

FSH and testosterone together stimulating the testes to produce sperm.

Question 3

A hormone that is fat-soluble and binds to an intracellular receptor is most likely:

Accepted Answer

A steroid hormone

Question 4

Which of the following glands is both an endocrine and exocrine gland?

Accepted Answer

Pancreas

Question 5

Which hormone is released in response to humoral stimuli, specifically high blood glucose levels?

Accepted Answer

Insulin

Question 6

Which hormone is released from the posterior pituitary and acts primarily on the kidneys to increase water retention?

Accepted Answer

Antidiuretic hormone (ADH)

Question 7

Which hormone is responsible for stimulating powerful uterine contractions during childbirth and is released using a positive feedback loop?

Accepted Answer

Oxytocin (OT)

Question 8

Which hormone is released from the anterior pituitary and stimulates the thyroid gland to release thyroid hormones?

Accepted Answer

Thyroid stimulating hormone (TSH)

Question 9

Which hormone decreases blood calcium levels by causing calcium to be deposited in bone?

Accepted Answer

Calcitonin

Question 10

Which hormone increases blood calcium levels by stimulating osteoclasts to reabsorb calcium from bone?

Accepted Answer

Parathyroid hormone

Question 11

Which hormone is released from the adrenal cortex in response to rising levels of ACTH and increases blood glucose by breaking down fats and proteins?

Accepted Answer

Cortisol

Question 12

Which hormone is released from the adrenal medulla in response to neural stimuli and is intended to respond to short-term stress?

Accepted Answer

Epinephrine

Question 13

Which hormone is released from beta cells in the pancreas and decreases blood glucose levels?

Accepted Answer

Insulin

Question 14

Which hormone is released from alpha cells in the pancreas and increases blood glucose levels?

Accepted Answer

Glucagon

Question 15

Which hormone stimulates follicle development in the ovaries and sperm development in the testes?

Accepted Answer

Follicle stimulating hormone (FSH)

Question 16

Which hormone triggers ovulation in females and stimulates testosterone production in males?

Accepted Answer

Luteinizing hormone (LH)

Question 17

Which hormone is released from the pineal gland and helps regulate sleep cycles?

Accepted Answer

Melatonin

Question 18

Which hormone is released from the thymus and stimulates the development of lymphatic organs and maturation of T-cells?

Accepted Answer

Thymopoietin

Question 19

Which hormone is released from the adrenal cortex and regulates electrolyte balance by targeting kidney tubules?

Accepted Answer

Aldosterone

Question 20

Which hormone is released from the anterior pituitary and stimulates cell growth, division, and increases fat burning for energy?

Accepted Answer

Growth hormone (GH)

The Endocrine System: Structure, Function, and Hormonal Regulation

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