Q: Which equation best represents the process of gluconeogenesis stimulated by cortisol?

$$Glucose = \text{Amino acids} + \text{Fatty acids} \rightarrow \text{Glucose}$$

Question 1

Which hormone is primarily responsible for stimulating Na$$^+$$ reabsorption and K$$^+$$ elimination in the kidneys, thereby increasing blood volume and pressure?

Accepted Answer

Aldosterone

Question 2

A patient presents with hypertension, edema, and abnormal muscle function due to excessive Na$$^+$$ retention and K$$^+$$ excretion. Which endocrine disorder is most likely responsible?

Accepted Answer

Aldosteronism

Question 3

Which layer of the adrenal cortex is responsible for producing glucocorticoids such as cortisol?

Accepted Answer

Zona fasciculata

Question 4

Cortisol secretion is regulated by a negative feedback loop involving ACTH and CRH. If cortisol levels are low, which of the following will occur?

Accepted Answer

ACTH and CRH secretion will increase

Question 5

Which of the following is a primary metabolic effect of cortisol?

Accepted Answer

Gluconeogenesis

Question 6

A patient with Cushing's syndrome is likely to exhibit which of the following symptoms?

Accepted Answer

Moon face and buffalo hump

Question 7

Which hormone is secreted by the pineal gland and is involved in regulating circadian rhythms and sleep cycles?

Accepted Answer

Melatonin

Question 8

Atrial natriuretic peptide (ANP) is released by the heart in response to high blood pressure. What is its effect on aldosterone secretion?

Accepted Answer

Blocks aldosterone secretion

Question 9

Which of the following is a direct effect of increased plasma K$$^+$$ concentration on the adrenal cortex?

Accepted Answer

Stimulation of aldosterone release

Question 10

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

Accepted Answer

Low plasma glucose and Na$$^+$$

Question 11

Which hormone is released in response to decreased blood pressure and initiates the renin-angiotensin-aldosterone mechanism?

Accepted Answer

Renin

Question 12

Which of the following is a consequence of untreated diabetic ketoacidosis?

Accepted Answer

Coma and death

Question 13

Which hormone is responsible for stimulating uterine contractions and milk ejection during childbirth and breastfeeding?

Accepted Answer

Oxytocin

Question 14

Which of the following is a symptom of hypoglycemia caused by excessive insulin secretion (hyperinsulinism)?

Accepted Answer

Anxiety and unconsciousness

Question 15

Which hormone is released by the kidneys and stimulates the production of red blood cells?

Accepted Answer

Erythropoietin (EPO)

Question 16

Which of the following is a function of glucocorticoids at excessive levels?

Accepted Answer

Depress immune system

Question 17

Which hormone is involved in the sensation of satiety and stimulates increased energy expenditure?

Accepted Answer

Leptin

Question 18

Which of the following best describes the role of weak androgens produced by the adrenal cortex?

Accepted Answer

They are converted to testosterone and estrogens, contributing to puberty and sex drive in women.

Question 19

A female patient presents with excessive facial hair and a clitoris resembling a small penis. Which endocrine disorder is most likely responsible?

Accepted Answer

Adrenogenital syndrome

Question 20

Which equation best represents the process of gluconeogenesis stimulated by cortisol?

Accepted Answer

$$Glucose = 	ext{Amino acids} + 	ext{Fatty acids} ightarrow 	ext{Glucose}$$

The Endocrine System: Structure, Function, and Hormonal Regulation

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