Question 1

Which of the following best describes the main difference between the effects of the endocrine system and the nervous system?

Accepted Answer

The endocrine system acts slower but its effects last longer.

Question 2

A patient presents with low metabolic rate, weight gain, and intolerance to cold. Blood tests reveal low levels of thyroxine. Which gland is most likely underactive?

Accepted Answer

Thyroid gland

Question 3

Which hormone is released in response to low blood calcium levels, and what is one of its main actions?

Accepted Answer

Parathyroid hormone (PTH); stimulates osteoclasts

Question 4

Which of the following is NOT a function of hormones?

Accepted Answer

Directly conducting electrical impulses

Question 5

A person with damage to the posterior pituitary would most likely have trouble with which of the following?

Accepted Answer

Reabsorbing water in the kidneys

Question 6

Which hormone is released from the anterior pituitary and stimulates the thyroid gland to release its hormones?

Accepted Answer

Thyroid Stimulating Hormone (TSH)

Question 7

A patient with excessive thirst, frequent urination, and high blood glucose is most likely suffering from which condition?

Accepted Answer

Diabetes mellitus

Question 8

Which hormone is produced by the zona glomerulosa of the adrenal cortex and what is its primary function?

Accepted Answer

Aldosterone; regulates sodium balance

Question 9

Which of the following best explains why a person with a tumor producing excess ACTH might develop high blood pressure?

Accepted Answer

ACTH stimulates the adrenal cortex to release glucocorticoids, which help maintain blood pressure.

Question 10

Which hormone is responsible for stimulating milk production in the mammary glands?

Accepted Answer

Prolactin

Question 11

A person with hyperthyroidism is likely to experience which of the following symptoms?

Accepted Answer

Weight loss, sweating, and bulging eyes

Question 12

Which hormone is released from the pancreas in response to high blood glucose, and what is its effect?

Accepted Answer

Insulin; stimulates glucose uptake by tissues

Question 13

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

Accepted Answer

It produces hormones that are stored and released by the posterior pituitary.

Question 14

Which hormone is primarily responsible for the 'fight or flight' response and is released by the adrenal medulla?

Accepted Answer

Epinephrine

Question 15

A patient has high blood calcium levels. Which hormone would you expect to be released in higher amounts to help lower the calcium?

Accepted Answer

Calcitonin

Question 16

Which of the following is a correct sequence for hormonal regulation involving the hypothalamus, anterior pituitary, and a target gland?

Accepted Answer

Hypothalamus releases TRH → Anterior pituitary releases TSH → Thyroid releases thyroxine

Question 17

Which hormone is produced by the pineal gland and what is its main function?

Accepted Answer

Melatonin; regulates sleep/wake cycles

Question 18

Which of the following best explains why a person with Addison's disease (adrenal insufficiency) might experience low blood pressure?

Accepted Answer

Decreased aldosterone leads to less sodium reabsorption, reducing blood volume and pressure.

Question 19

Which hormone is responsible for stimulating the development of T lymphocytes in children?

Accepted Answer

Thymosin

Question 20

A patient is experiencing symptoms of excessive hunger, thirst, and urination, along with weight loss and ketones in the urine. Which equation best represents the process occurring in their body?

Accepted Answer

$$	ext{Fat} ightarrow 	ext{Ketones} + 	ext{Energy}$$

The Endocrine System: Structure, Function, and Hormonal Regulation

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