Question 1

Which of the following hormones is produced by the neurohypophysis and is primarily responsible for stimulating uterine contractions during childbirth?

Accepted Answer

Oxytocin

Question 2

A patient presents with symptoms of hyperthyroidism, including weight loss, heat intolerance, and tachycardia. Which hormone is most likely elevated in this patient?

Accepted Answer

Thyroxine ($$T_4)$$

Question 3

Which of the following best describes the anatomical organization of the pituitary gland?

Accepted Answer

It consists of an anterior lobe (adenohypophysis) and a posterior lobe (neurohypophysis)

Question 4

Which hormone is produced by the adrenal medulla and is responsible for the 'fight or flight' response?

Accepted Answer

Epinephrine

Question 5

A patient with diabetes mellitus is unable to regulate blood glucose levels due to a deficiency in which pancreatic hormone?

Accepted Answer

Insulin

Question 6

Which of the following is a major function of parathyroid hormone ($$PTH) in $$humans?

Accepted Answer

Increasing blood calcium levels by stimulating bone resorption

Question 7

Which hormone is produced in greatest abundance by the thyroid gland?

Accepted Answer

Thyroxine ($$T_4)$$

Question 8

Which of the following best describes the mechanism by which steroid hormones exert their effects?

Accepted Answer

They bind to intracellular receptors and directly influence gene transcription

Question 9

A patient is diagnosed with Cushing's syndrome. Which hormone is most likely being hypersecreted?

Accepted Answer

Cortisol

Question 10

Which of the following hormones is produced by the placenta and is tested for in home pregnancy tests?

Accepted Answer

Human chorionic gonadotropin (hCG)

Question 11

Which of the following is a correct sequence for the cAMP second messenger pathway activated by a peptide hormone?

Accepted Answer

Hormone binds receptor $$\rightarrow G $$protein activation $$\rightarrow$$ Adenylate cyclase activation $$\rightarrow$$ cAMP production $$\rightarrow$$ Protein kinase activation

Question 12

Which of the following is NOT a major effect of thyroid hormones?

Accepted Answer

Decreasing metabolic rate

Question 13

Which hormone is secreted by the alpha cells of the pancreas and raises blood glucose levels?

Accepted Answer

Glucagon

Question 14

Which of the following conditions is associated with hyposecretion of antidiuretic hormone (ADH)?

Accepted Answer

Diabetes insipidus

Question 15

Which of the following is a correct description of the hypothalamo-hypophyseal portal system?

Accepted Answer

A network of blood vessels connecting the hypothalamus to the anterior pituitary, allowing direct hormone transport

Question 16

Which hormone is produced by the zona glomerulosa of the adrenal cortex?

Accepted Answer

Aldosterone

Question 17

Which of the following is a major effect of insulin?

Accepted Answer

Facilitating cellular uptake of glucose and lowering blood glucose levels

Question 18

Which of the following best describes the relationship between $$T_3$$ and $$T_4$$?

Accepted Answer

$$T_4 is $$converted to the more active $$T_3 in $$peripheral tissues

Question 19

Which of the following is a common manifestation of hypersecretion of growth hormone in adults?

Accepted Answer

Acromegaly

Question 20

Which of the following hormones is produced by the gonads and is responsible for the development of secondary sexual characteristics in males?

Accepted Answer

Testosterone

Endocrine System: Anatomy, Physiology, and Hormone Regulation

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