Question 1

Which hormone is produced by the pineal gland and is primarily responsible for regulating circadian rhythms?

Accepted Answer

Melatonin

Question 2

A patient presents with abnormally high blood calcium levels. Which hormone is most likely deficient?

Accepted Answer

Calcitonin

Question 3

Which of the following is a direct effect of thyroid hormones on the body?

Accepted Answer

Increase in oxygen consumption and energy expenditure

Question 4

The anterior pituitary lobe secretes which of the following hormones?

Accepted Answer

Growth hormone (GH)

Question 5

Which hormone is released from the adrenal medulla and is involved in the 'fight or flight' response?

Accepted Answer

Epinephrine

Question 6

A patient with diabetes mellitus has difficulty regulating blood glucose levels. Which pancreatic hormone is most directly involved in lowering blood glucose?

Accepted Answer

Insulin

Question 7

Which of the following equations correctly represents the relationship between hormone concentration ($$[H]$$), rate of secretion ($$R_s$$), and rate of removal ($$R_r) in $$steady-state conditions?

Accepted Answer

$$[H] = \frac{R_s}{R_r}$$

Question 8

Which hormone stimulates uterine contractions during childbirth and milk ejection during breastfeeding?

Accepted Answer

Oxytocin

Question 9

A patient with an adrenal cortex tumor is producing excess cortisol. Which of the following symptoms would you expect?

Accepted Answer

Increased blood glucose

Question 10

Which structure connects the hypothalamus to the pituitary gland, allowing for the transport of releasing and inhibiting hormones?

Accepted Answer

Infundibulum

Question 11

Which hormone is secreted by the anterior pituitary and stimulates the thyroid gland to produce thyroid hormones?

Accepted Answer

Thyroid-stimulating hormone (TSH)

Question 12

Which of the following is a function of the hormone erythropoietin (EPO) produced by the kidneys?

Accepted Answer

Stimulates red blood cell formation

Question 13

A patient is experiencing dehydration and increased urine output. Which hormone deficiency is most likely responsible?

Accepted Answer

Antidiuretic hormone (ADH)

Question 14

Which hormone is responsible for stimulating the development of ovarian follicles in females and spermatogenesis in males?

Accepted Answer

Follicle-stimulating hormone (FSH)

Question 15

Which of the following best describes the histological organization of the thyroid gland?

Accepted Answer

Follicles filled with colloid surrounded by follicular epithelium

Question 16

Which hormone is secreted by the pancreatic alpha cells and increases blood glucose levels?

Accepted Answer

Glucagon

Question 17

Which equation best represents the effect of thyroid hormones on basal metabolic rate (BMR), where $$BMR is $$basal metabolic rate and $$[TH] is $$thyroid hormone concentration?

Accepted Answer

$$BMR = k 	imes [TH]$$

Question 18

Which hormone is secreted by the adrenal cortex and is primarily responsible for sodium retention in the kidneys?

Accepted Answer

Aldosterone

Question 19

A patient with low levels of ACTH would most likely have decreased production of which hormone?

Accepted Answer

Cortisol

Question 20

Which hormone is secreted by the anterior pituitary and stimulates milk production in the mammary glands?

Accepted Answer

Prolactin

Overview of the Endocrine System: Glands, Hormones, and Histology

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