Q: Which of the following is a correct formula for the negative feedback mechanism regulating thyroid hormone levels?

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

Q: Which of the following is a correct sequence for the hypothalamic-pituitary-adrenal (HPA) axis?

$\text{Hypothalamus} \rightarrow \text{CRH} \rightarrow \text{Pituitary} \rightarrow \text{ACTH} \rightarrow \text{Adrenal cortex} \rightarrow \text{Cortisol}$

Question 1

Which of the following best describes the primary function of the endocrine system?

Accepted Answer

To regulate body activities by releasing hormones into the bloodstream for long-term control

Question 2

A patient presents with symptoms of hypothyroidism. Which endocrine gland is most likely malfunctioning?

Accepted Answer

Thyroid gland

Question 3

Which of the following hormones is NOT produced by the anterior pituitary?

Accepted Answer

Antidiuretic hormone (ADH)

Question 4

A person with damage to the posterior pituitary would most likely have problems regulating which physiological process?

Accepted Answer

Water balance and urine concentration

Question 5

Which of the following best explains the difference between endocrine and exocrine glands?

Accepted Answer

Endocrine glands secrete hormones directly into the bloodstream; exocrine glands secrete substances into ducts

Question 6

Which hormone is released in response to high blood glucose levels and acts to lower it?

Accepted Answer

Insulin

Question 7

A patient is experiencing symptoms of Cushing's syndrome, including high blood glucose and hypertension. Which hormone is most likely elevated?

Accepted Answer

Cortisol

Question 8

Which of the following is a correct formula for the negative feedback mechanism regulating thyroid hormone levels?

Accepted Answer

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

Question 9

Which hormone is responsible for stimulating the release of cortisol from the adrenal cortex?

Accepted Answer

Adrenocorticotropic hormone (ACTH)

Question 10

A patient with diabetes insipidus is unable to concentrate urine. Which hormone is deficient?

Accepted Answer

Antidiuretic hormone (ADH)

Question 11

Which of the following is a lipid-soluble hormone that can pass through the cell membrane and bind to intracellular receptors?

Accepted Answer

Thyroxine ($T_4$)

Question 12

A patient is given a synthetic analog of parathyroid hormone. What effect would you expect on blood calcium levels?

Accepted Answer

Increase in blood calcium levels

Question 13

Which of the following best describes the mechanism of action for peptide hormones?

Accepted Answer

They bind to cell surface receptors and activate second messenger systems

Question 14

Which equation best represents the relationship between hormone concentration ($[H]$), rate of secretion ($S$), and rate of removal ($R$) in the bloodstream?

Accepted Answer

$[H] = \dfrac{S}{R}$

Question 15

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

Accepted Answer

Kidney stones due to high calcium

Question 16

Which hormone is released by the pancreas in response to low blood glucose and acts to increase it?

Accepted Answer

Glucagon

Question 17

A patient with Addison's disease has low levels of cortisol and aldosterone. Which part of the adrenal gland is most likely affected?

Accepted Answer

Adrenal cortex

Question 18

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

Accepted Answer

$	ext{Hypothalamus} ightarrow 	ext{CRH} ightarrow 	ext{Pituitary} ightarrow 	ext{ACTH} ightarrow 	ext{Adrenal cortex} ightarrow 	ext{Cortisol}$

Question 19

Which hormone is most directly involved in the body's response to acute stress (fight-or-flight)?

Accepted Answer

Epinephrine

Question 20

A patient with a tumor in the anterior pituitary secreting excess growth hormone (GH) would most likely develop which condition?

Accepted Answer

Acromegaly

Anatomy & Physiology II: Endocrine System (Chapter 16, Part 1) Study Notes

Study Guide - Practice Questions

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