Question 1

Which of the following best describes the feedback mechanism regulating oxytocin release during childbirth?

Accepted Answer

Positive feedback, where increased oxytocin stimulates further release

Question 2

Alcohol consumption leads to increased urine output because it inhibits the release of which hormone?

Accepted Answer

Antidiuretic hormone (ADH)

Question 3

A patient presents with excessive thirst, frequent urination, and high blood glucose. Which hormone is most likely deficient or inactive?

Accepted Answer

Insulin

Question 4

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

Accepted Answer

Stimulates reabsorption of calcium and secretion of phosphate

Question 5

Which hormone is primarily responsible for lowering blood calcium levels in children?

Accepted Answer

Calcitonin

Question 6

A patient with hypersecretion of glucocorticoids may experience which of the following symptoms?

Accepted Answer

Depressed cartilage and bone formation

Question 7

Which of the following correctly matches the hormone with its primary function?

Accepted Answer

Aldosterone: Increases potassium excretion and sodium reabsorption

Question 8

Which process is stimulated by insulin binding to its receptor in muscle and adipose tissue?

Accepted Answer

Glycogen synthesis from glucose

Question 9

A patient with low blood sodium, high blood potassium, and low blood pressure is most likely to have a deficiency in which hormone?

Accepted Answer

Aldosterone

Question 10

Which hormone is secreted by the adrenal medulla and is more potent in stimulating heart rate and metabolic activities?

Accepted Answer

Epinephrine

Question 11

Which of the following is a correct sequence in the synthesis of thyroid hormones?

Accepted Answer

Iodide is oxidized to iodine, which attaches to tyrosine to form MIT and DIT

Question 12

Which hormone is released in response to low blood volume and acts to increase sodium reabsorption in the kidneys?

Accepted Answer

Aldosterone

Question 13

Which hormone is antagonistic to parathyroid hormone (PTH) in regulating blood calcium levels?

Accepted Answer

Calcitonin

Question 14

Which of the following is a function of glucocorticoids during stress?

Accepted Answer

Promote gluconeogenesis, increasing blood glucose

Question 15

Which hormone is produced by the heart and acts to reduce blood pressure, blood volume, and blood sodium concentration?

Accepted Answer

Atrial natriuretic peptide (ANP)

Question 16

Which hormone is responsible for the onset of puberty and the appearance of secondary sex characteristics in males?

Accepted Answer

Testosterone

Question 17

Which hormone is secreted by the pineal gland and is involved in regulating day/night cycles?

Accepted Answer

Melatonin

Question 18

Which hormone stimulates the production of red blood cells in response to low oxygen levels?

Accepted Answer

Erythropoietin

Question 19

Which hormone is essential for the development of T lymphocytes (T cells) in the immune system?

Accepted Answer

Thymopoietins and thymosins

Question 20

A patient with muscle atrophy and decreased basal metabolic rate is most likely experiencing a decline in which hormone with age?

Accepted Answer

Growth hormone (GH)

The Endocrine System: Hormones, Glands, and Regulation

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