Q: Which of the following equations correctly represents the negative feedback mechanism regulating thyroid hormone levels?

$$TRH \rightarrow TSH \rightarrow T_3$/T_4$ \rightarrow \text{inhibition of TRH and TSH}$$

Q: Which of the following equations best represents the effect of insulin on blood glucose levels?

$$\text{Blood glucose} \xrightarrow{\text{Insulin}} \text{Decrease}$$

Question 1

Which of the following endocrine glands is responsible for regulating blood calcium levels through the secretion of parathyroid hormone (PTH)?

Accepted Answer

Parathyroid gland

Question 2

The adrenal cortex is divided into three distinct zones. Which zone is primarily responsible for the secretion of mineralocorticoids such as aldosterone?

Accepted Answer

Zona glomerulosa

Question 3

A patient presents with symptoms of hyperglycemia. Which endocrine organ is most likely malfunctioning, and which hormone is directly involved?

Accepted Answer

Pancreas; insulin

Question 4

Which hormone is released from the posterior pituitary and is responsible for water reabsorption in the kidneys?

Accepted Answer

Antidiuretic hormone (ADH)

Question 5

If a person has a deficiency in thyroid hormone, which of the following symptoms would most likely be observed?

Accepted Answer

Decreased metabolic rate and weight gain

Question 6

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

Accepted Answer

Cortisol – increases blood glucose during stress

Question 7

A tumor in the zona fasciculata of the adrenal cortex would most likely result in abnormal secretion of which hormone?

Accepted Answer

Cortisol

Question 8

Which of the following equations correctly represents the negative feedback mechanism regulating thyroid hormone levels?

Accepted Answer

$$TRH ightarrow TSH ightarrow T_3$/T_4$ ightarrow 	ext{inhibition of TRH and TSH}$$

Question 9

Which of the following best describes the role of the hypothalamus in endocrine regulation?

Accepted Answer

It produces releasing and inhibiting hormones that control the anterior pituitary.

Question 10

A patient with damage to the posterior pituitary would most likely have difficulty with which physiological process?

Accepted Answer

Water retention and uterine contractions

Question 11

Which hormone is secreted by the pancreatic alpha cells and what is its primary effect?

Accepted Answer

Glucagon; raises blood glucose

Question 12

Which of the following is a correct sequence of hormone release in the hypothalamic-pituitary-adrenal (HPA) axis?

Accepted Answer

$$CRH \rightarrow ACTH \rightarrow Cortisol$$

Question 13

A patient with excessive secretion of growth hormone (GH) after epiphyseal plate closure will most likely develop which condition?

Accepted Answer

Acromegaly

Question 14

Which of the following hormones is produced by the zona reticularis of the adrenal cortex?

Accepted Answer

Androgens

Question 15

Which hormone is responsible for stimulating the release of milk from the mammary glands?

Accepted Answer

Oxytocin

Question 16

A patient with hypoparathyroidism is likely to experience which of the following symptoms?

Accepted Answer

Hypocalcemia

Question 17

Which of the following best describes the function of follicle-stimulating hormone (FSH) in males?

Accepted Answer

Stimulates sperm production

Question 18

Which hormone is secreted by the pineal gland and what is its primary function?

Accepted Answer

Melatonin; regulates sleep-wake cycles

Question 19

A patient with Addison's disease has a deficiency in which hormone, and what is the primary effect?

Accepted Answer

Cortisol; decreased ability to respond to stress

Question 20

Which of the following equations best represents the effect of insulin on blood glucose levels?

Accepted Answer

$$	ext{Blood glucose} \xrightarrow{	ext{Insulin}} 	ext{Decrease}$$

Functional Anatomy of the Endocrine Glands

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