Question 1

Which of the following best explains why endocrine responses are generally slower but longer-lasting than nervous system responses?

Accepted Answer

Hormones are released into the bloodstream and act on distant targets, resulting in slower onset and prolonged effects.

Question 2

A patient presents with symptoms of excessive thirst and dilute urine. Laboratory tests reveal low antidiuretic hormone (ADH) levels. Which disorder is most likely?

Accepted Answer

Diabetes insipidus

Question 3

Which hormone is classified as a peptide, is water-soluble, and acts via second messengers such as $$cAMP$$?

Accepted Answer

Insulin

Question 4

A patient with Addison's disease is most likely to have a deficiency in which type of hormone?

Accepted Answer

Steroid hormone (e.g., cortisol, aldosterone)

Question 5

Which feedback mechanism is responsible for amplifying the release of oxytocin during labor?

Accepted Answer

Positive feedback

Question 6

Which of the following best describes the transport of steroid hormones in the blood?

Accepted Answer

They are bound to carrier proteins such as albumin and CBG.

Question 7

A patient with hyperthyroidism is found to have excess $$T_3$$ and $$T_4. $$Which type of hormone are these?

Accepted Answer

Amine hormones derived from tyrosine

Question 8

Which layer of the adrenal cortex is responsible for producing aldosterone, and what is its primary physiological effect?

Accepted Answer

Zona glomerulosa; regulates sodium and blood pressure

Question 9

If a patient has a defect in insulin production, which metabolic process will be most directly affected?

Accepted Answer

Glucose uptake and metabolism

Question 10

Which hormone is released from the anterior pituitary and stimulates growth in children?

Accepted Answer

Growth hormone (GH)

Question 11

A patient with SIADH (syndrome of inappropriate antidiuretic hormone) will most likely present with which laboratory finding?

Accepted Answer

Hyponatremia due to water retention

Question 12

Which hormone is produced by the zona fasciculata of the adrenal cortex and is involved in the stress response?

Accepted Answer

Cortisol

Question 13

Which of the following is a correct example of negative feedback in endocrine regulation?

Accepted Answer

TSH inhibition by high levels of $$T_3$$/$$T_4$$

Question 14

A patient with Cushing's syndrome is likely to have which of the following laboratory findings?

Accepted Answer

High cortisol and obesity

Question 15

Which hormone is secreted by the posterior pituitary and is involved in water retention?

Accepted Answer

Antidiuretic hormone (ADH)

Question 16

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

Accepted Answer

It maintains homeostasis and links the nervous and endocrine systems.

Question 17

A patient with hyperprolactinemia may present with which clinical symptom?

Accepted Answer

Galactorrhea (milk production)

Question 18

Which hormone is produced by the testes and is primarily responsible for male growth and reproduction?

Accepted Answer

Testosterone

Question 19

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

Accepted Answer

Cross the cell membrane and bind to intracellular receptors to regulate gene transcription

Question 20

A patient with Hashimoto's thyroiditis is most likely to have which hormonal abnormality?

Accepted Answer

Deficient $$T_3$$/$$T_4 ($$hypothyroidism)

Endocrine System: Mini-Textbook Study Guide

Study Guide - Practice Questions

Study Guide - Flashcards