$$\text{Glucagon} + \text{Epinephrine} + \text{Cortisol} \u003e \text{Glucagon} + \text{Epinephrine} + \text{Cortisol}$$

Question 1

Which of the following best explains why the endocrine system is slower than the nervous system in regulating body functions?

Accepted Answer

Hormones must travel through the bloodstream to reach target cells.

Question 2

A steroid hormone, such as cortisol, exerts its effects by:

Accepted Answer

Binding to intracellular receptors and altering gene expression.

Question 3

Which hormone is released in response to hypercalcemia and acts to decrease blood calcium levels?

Accepted Answer

Calcitonin

Question 4

A patient presents with rapid heart rate, weight loss, and exophthalmia. Which disorder is most likely?

Accepted Answer

Hyperthyroidism (Graves disease)

Question 5

Which of the following equations represents the synergistic effect of glucagon, epinephrine, and cortisol on blood glucose levels?

Accepted Answer

$$	ext{Glucagon} + 	ext{Epinephrine} + 	ext{Cortisol} \u003e 	ext{Glucagon} + 	ext{Epinephrine} + 	ext{Cortisol}$$

Question 6

Which hormone is produced by the adrenal cortex and is primarily responsible for increasing sodium and water reabsorption?

Accepted Answer

Aldosterone

Question 7

A patient with hyposecretion of cortisol and aldosterone is most likely suffering from:

Accepted Answer

Addison disease

Question 8

Which hormone is released by the pancreas in response to low blood glucose and acts on the liver to increase glucose levels?

Accepted Answer

Glucagon

Question 9

Which of the following best describes the mechanism of action for peptide/protein hormones?

Accepted Answer

They bind to extracellular receptors and activate second messenger systems.

Question 10

Which hormone is responsible for stimulating milk production in females?

Accepted Answer

Prolactin

Question 11

Which of the following is a consequence of untreated diabetes mellitus?

Accepted Answer

Blindness and kidney failure

Question 12

Which hormone is released by the posterior pituitary and increases water retention by the kidneys?

Accepted Answer

Antidiuretic hormone (ADH)

Question 13

Which of the following best describes negative feedback regulation in the endocrine system?

Accepted Answer

Hormone secretion decreases as the regulated variable returns to normal.

Question 14

Which hormone is produced by the pineal gland and regulates sleep/wake cycles?

Accepted Answer

Melatonin

Question 15

Which hormone stimulates the adrenal cortex to release cortisol?

Accepted Answer

Adrenocorticotropic hormone (ACTH)

Question 16

Which hormone is produced by the parathyroid gland and increases blood calcium levels?

Accepted Answer

Parathyroid hormone (PTH)

Question 17

Which hormone is released by the heart and decreases blood pressure by promoting sodium excretion?

Accepted Answer

Atrial Natriuretic Peptide (ANP)

Question 18

Which hormone is responsible for stimulating ovulation in females?

Accepted Answer

Luteinizing hormone (LH)

Question 19

Which hormone is produced by adipose tissue and regulates appetite?

Accepted Answer

Leptin

Question 20

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

Accepted Answer

Erythropoietin

BIO 169: The Endocrine System - Comprehensive Study Notes

Study Guide - Practice Questions