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March 21, 2025

Endocrine System Quizzes

Anatomy & Physiology Quizzes

Test your knowledge with this Endocrine System Quiz. Challenge yourself with engaging questions about hormones, glands, and their functions in the human body. Ideal for students and health professionals. Take the quiz now and see how much you know.

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Endocrine System

Endocrine System

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1. The hypothalamus produces “releasing hormones”. What do these releasing hormones do?

1. They direct the posterior pituitary to release hormones.

2. They direct the anterior pituitary to release hormones.

3. They direct the gonads to release hormones

4. They act as “second messengers” when hormones bind to their receptor site.

B: The anterior pituitary produces hormones that stimulate other endocrine organs, but the anterior pituitary does not release hormones until directed by the hypothalamus.

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2. Peptide hormones are produced (and/or released) by which structure?

1. The adrenal cortex

2. The gonads

3. The hypothalamus

4. The kidneys

C: The hypothalamus produces peptide hormones.

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3. What effect does aldosterone have?

1. It causes glucose to be absorbed from the blood.

2. It cause Na+ to be absorbed in the kidneys.

3. It causes Ca++ to be absorbed from the gut.

4. It causes K+ to be absorbed from the filtrate.

B: Aldosterone causes reclamation of sodium ions from the filtrate and potassium to be secreted in exchange.

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4. Which of the following hormones CANNOT be given orally?

1. Sex hormones

2. Amino acid-based hormones

3. Thyroid hormones

4. Steroids

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5. Which of the following is NOT part of the endocrine system?

1. The thymus

2. The pineal gland

3. The acini cells of the pancreas

4. The posterior pituitary gland

C: The acini cells produce digestive enzymes.

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6. By what term are hormones derived from tyrosine also known?

1. Amino acid derivatives

2. Peptide hormones

3. Steroid hormones

4. Corticosteroids

A: Catecholamines (adrenaline, noradrenaline), dopamine and thyroid hormone are all derived from tyrosine.

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7. Which statement below is true of steroid hormones?

1. They do not have a specific receptor to bind with.

2. They are not lipid soluble to bind to receptor proteins on the cell membrane.

3. They are lipid soluble so diffuse through the cell membrane.

4. They cross the cell membrane via a carrier mechanism.

C: Steroids are lipid soluble so diffuse through the plasma membrane to bind to a receptor within the cell.

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8. Which statement applies to steroid hormones?

1. They are transported dissolved in blood.

2. They bind to receptor proteins on the outside of the plasma membrane.

3. They cross the plasma membrane by using a protein carrier mechanism.

4. They bind to receptors in the cell cytoplasm or nucleus.

D: As steroid hormones are lipid soluble, their receptors are inside the cell as they can cross the plasma membrane.

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9. From where are antidiuretic hormone and oxytocin released?

1. The anterior pituitary

2. The posterior pituitary

3. The adrenal cortex

4. The adrenal medulla

B: ADH and OT are produced in the hypothalamus and transported to the posterior pituitary.

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10. Which of the following is an amino acid derivative hormone?

1. Epinephrine

2. Tyrosine

3. Testosterone

4. Prostaglandin

A: Epinephrine is derived from the amino acid tyrosine (so tyrosine is a wrong answer).

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11. Which hormone(s) increases the reabsorption of Ca++ from the filtrate in the kidney tubule?

1. Calcitonin

2. Mineralocorticoids

3. Parathyroid hormone

4. Aldosterone

C: PTH causes increased calcium absorption and hence increases blood calcium level.

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12. What effect does parathyroid hormone have?

1. It increases plasma Ca2+ concentration.

2. It decreases plasma Ca2+ concentration.

3. It increases the rate of ATP formation.

4. It stimulates the thyroid gland to produce thyroxine.

A: PTH increases plasma Ca2+ (calcitonin aids in lowering blood calcium).

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13. What is produced by the beta cells of the pancreas?

1. Angiotensin-converting enzyme

2. Glucocorticoids

3. Glucagon

4. Insulin

D: Beta cells of the pancreatic islets produce insulin. The alpha cells produce glucagon.

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14. Which one of the statements below is true?

1. The anterior pituitary produces testosterone from cholesterol and releases it when releasing hormones arrive from the hypothalamus.

2. The hypothalamus produces ADH and oxytocin which are stored in the posterior pituitary.

3. The posterior pituitary contains autonomic centres that exert neural control over the adrenal glands.

4. The thalamus produces ADH and oxytocin which are stored in the anterior pituitary.

B: Testosterone is not produced in the pituitary nor does the pituitary contain autonomic centres.

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15. Which endocrine organ produces “releasing hormones” and “inhibitory hormones”?

1. Thyroid

2. Anterior pituitary

3. Hypothalamus

4. Thalamus

C: The hypothalamus controls the secretion of the anterior pituitary by the use of “releasing hormones” and “inhibitory hormones”.

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16. Which structure controls the endocrine system and integrates the activities of the nervous and endocrine systems?

1. The infundibulum

2. The pituitary gland

3. The thalamus

4. The hypothalamus

D: Hypothalamus secretes regulatory hormones that control endocrine cells in the anterior pituitary gland, produces ADH and oxytocin and contains “autonomic centres” that exert neural control over endocrine cells of the adrenal medullae.

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