Question 1

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

Accepted Answer

Exocrine glands produce non-hormonal substances and have ducts, while endocrine glands produce hormones and lack ducts.

Question 2

Which hormone is classified as a steroid and can cross the plasma membrane?

Accepted Answer

Cortisol

Question 3

A patient presents with excessive thirst, frequent urination, and high blood glucose levels. Which hormone is most likely deficient?

Accepted Answer

Insulin

Question 4

Which of the following is a function of the endocrine system?

Accepted Answer

Regulating cellular metabolism and energy balance

Question 5

Which of the following best explains the role of negative feedback in hormone secretion?

Accepted Answer

Negative feedback inhibits further hormone release when target organ effects increase.

Question 6

Which hormone is secreted by the posterior pituitary and acts as a strong stimulant of uterine contraction during childbirth?

Accepted Answer

Oxytocin

Question 7

Which of the following hormones is produced by the adrenal medulla and is responsible for the 'fight or flight' response?

Accepted Answer

Epinephrine

Question 8

Which hormone is secreted in response to low blood calcium levels and stimulates osteoclasts to digest bone matrix?

Accepted Answer

Parathyroid hormone (PTH)

Question 9

Which of the following is a water-soluble hormone that cannot cross the plasma membrane?

Accepted Answer

Insulin

Question 10

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

Accepted Answer

Calcium leaching from bones and kidney stone formation

Question 11

Which hormone is secreted by the pineal gland and is involved in regulating sleep-wake cycles?

Accepted Answer

Melatonin

Question 12

Which of the following is an example of hormonal antagonism?

Accepted Answer

Glucagon and insulin acting on blood glucose levels

Question 13

Which hormone is responsible for stimulating milk production in females?

Accepted Answer

Prolactin

Question 14

Which of the following is a direct effect of thyroid hormone (TH) on the body?

Accepted Answer

Regulating the body's major metabolic processes

Question 15

Which hormone is secreted by the anterior pituitary and stimulates the adrenal cortex to release corticosteroids?

Accepted Answer

Adrenocorticotropic hormone (ACTH)

Question 16

Which of the following is a clinical implication of hyposecretion of growth hormone (GH) in children?

Accepted Answer

Pituitary dwarfism

Question 17

Which hormone is secreted by the heart and decreases blood sodium concentration, thereby lowering blood pressure and volume?

Accepted Answer

Atrial natriuretic peptide (ANP)

Question 18

Which hormone is secreted by the kidneys and signals the production of red blood cells?

Accepted Answer

Erythropoietin

Question 19

Which of the following best describes the permissiveness effect in hormone interactions?

Accepted Answer

One hormone cannot exert its effects without another hormone being present.

Question 20

Which hormone is secreted by the ovaries and is responsible for the maturation of reproductive organs and secondary sexual characteristics in females?

Accepted Answer

Estrogen

Chapter 16: The Endocrine System – Structure, Function, and Clinical Implications

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