Question 1

Which of the following best describes the primary difference between the endocrine and nervous systems in terms of signal transmission?

Accepted Answer

The endocrine system uses chemical messengers transported by the blood, while the nervous system uses electrical impulses and neurotransmitters.

Question 2

A patient presents with symptoms of hyperglycemia. Which hormone is most likely deficient, and what is its primary target tissue?

Accepted Answer

Insulin; liver, muscle, and adipose tissue

Question 3

Which of the following hormones is produced by the zona glomerulosa of the adrenal cortex, and what is its main function?

Accepted Answer

Aldosterone; regulates sodium and potassium balance

Question 4

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

Accepted Answer

Parathyroid hormone (PTH); increases bone resorption

Question 5

A patient with damage to the posterior pituitary would most likely have issues with which of the following hormones?

Accepted Answer

Antidiuretic hormone (ADH) and oxytocin

Question 6

Which of the following best explains why steroid hormones can pass through cell membranes, while peptide hormones cannot?

Accepted Answer

Steroid hormones are lipid-soluble, allowing them to diffuse through the lipid bilayer of cell membranes.

Question 7

Which hormone is primarily responsible for stimulating the release of cortisol from the adrenal cortex?

Accepted Answer

Adrenocorticotropic hormone (ACTH)

Question 8

A patient is experiencing polyuria (excessive urination) and polydipsia (excessive thirst). Which hormone imbalance is most likely responsible?

Accepted Answer

Deficiency of antidiuretic hormone (ADH)

Question 9

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

Accepted Answer

Parathyroid hormone (PTH); increases blood calcium

Question 10

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

Accepted Answer

Thyroid-stimulating hormone (TSH)

Question 11

A patient with a tumor in the adrenal medulla is likely to have elevated levels of which hormone, and what is a common symptom?

Accepted Answer

Epinephrine; increased heart rate

Question 12

Which of the following best describes the role of the hypothalamus in the endocrine system?

Accepted Answer

It produces releasing and inhibiting hormones that regulate the anterior pituitary.

Question 13

Which hormone is responsible for stimulating uterine contractions during childbirth?

Accepted Answer

Oxytocin

Question 14

A patient with Graves' disease is likely to have which of the following laboratory findings?

Accepted Answer

Low TSH, high T3/T4

Question 15

Which of the following is a function of growth hormone (GH)?

Accepted Answer

Stimulates growth of bones and muscles

Question 16

Which hormone is secreted by the pineal gland and regulates circadian rhythms?

Accepted Answer

Melatonin

Question 17

Which of the following best describes the effect of negative feedback on hormone regulation?

Accepted Answer

It decreases hormone secretion when levels are high.

Question 18

A patient with Addison's disease is likely to have which of the following symptoms?

Accepted Answer

Hypotension and hyperkalemia

Question 19

Which hormone is primarily responsible for the 'fight or flight' response?

Accepted Answer

Epinephrine

Question 20

Which of the following is a direct effect of parathyroid hormone (PTH) on the kidneys?

Accepted Answer

Increases calcium reabsorption

Endocrine System: Structure, Function, and Hormonal Regulation

Study Guide - Practice Questions