Q: Which equation best represents the negative feedback mechanism between the hypothalamus and pituitary gland?

$$\text{Hypothalamus} \xrightarrow{\text{CRH}} \text{Pituitary} \xrightarrow{\text{ACTH}} \text{Adrenal Cortex} \xrightarrow{\text{Cortisol}} \text{Inhibition of CRH and ACTH}$$

Question 1

Which of the following best describes a similarity between the endocrine and nervous systems?

Accepted Answer

Both systems regulate homeostasis by releasing chemical messengers that affect target cells.

Question 2

A hormone classified as a steroid is most likely to:

Accepted Answer

Diffuse through the plasma membrane and bind to intracellular receptors.

Question 3

Which of the following organs is NOT considered a primary endocrine organ?

Accepted Answer

Liver

Question 4

A patient is diagnosed with hyperthyroidism. Which hormone is most likely elevated?

Accepted Answer

Thyroxine ($$T_4)$$

Question 5

Which equation best represents the negative feedback mechanism between the hypothalamus and pituitary gland?

Accepted Answer

$$	ext{Hypothalamus} \xrightarrow{	ext{CRH}} 	ext{Pituitary} \xrightarrow{	ext{ACTH}} 	ext{Adrenal Cortex} \xrightarrow{	ext{Cortisol}} 	ext{Inhibition of CRH and ACTH}$$

Question 6

Which hormone is secreted by the posterior pituitary and is responsible for water reabsorption in the kidneys?

Accepted Answer

Antidiuretic hormone (ADH)

Question 7

A patient presents with low blood calcium levels. Which hormone is most likely to be deficient?

Accepted Answer

Parathyroid hormone (PTH)

Question 8

Which of the following best describes the function of aldosterone?

Accepted Answer

Promotes sodium reabsorption and potassium excretion in the kidneys

Question 9

Which hormone produced by the pancreas lowers blood glucose levels?

Accepted Answer

Insulin

Question 10

Melatonin is secreted by the pineal gland. Which of the following is a primary function of melatonin?

Accepted Answer

Regulation of sleep-wake cycles

Question 11

A patient with Type 1 diabetes mellitus is most likely to have:

Accepted Answer

Autoimmune destruction of pancreatic beta cells

Question 12

Which of the following best illustrates how hormones interact to produce a coordinated physiological response?

Accepted Answer

Insulin and glucagon act antagonistically to regulate blood glucose levels.

Question 13

Which hormone produced by the heart helps lower blood pressure by promoting sodium excretion?

Accepted Answer

Atrial natriuretic peptide (ANP)

Question 14

Which hormone produced by the kidneys stimulates red blood cell production?

Accepted Answer

Erythropoietin

Question 15

A patient with Addison’s disease is most likely to exhibit which of the following symptoms?

Accepted Answer

Hyperpigmentation and low blood sodium

Question 16

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 17

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

Accepted Answer

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

Question 18

Which hormone is most likely to be elevated in a patient with Cushing’s syndrome?

Accepted Answer

Cortisol

Question 19

A child with growth hormone deficiency will most likely present with:

Accepted Answer

Dwarfism

Chapter 16: The Endocrine System – Study Notes

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드