Question 1

Which of the following best describes a key difference between lipid-soluble and water-soluble hormones in terms of their mechanism of action?

Accepted Answer

Lipid-soluble hormones typically alter gene expression by binding to intracellular receptors, whereas water-soluble hormones activate second messenger systems via membrane-bound receptors.

Question 2

A patient presents with symptoms of acromegaly, including enlarged hands and facial features. Which pituitary hormone is most likely over-secreted, and what is its primary effect?

Accepted Answer

Growth hormone (GH); stimulates growth of bones and soft tissues.

Question 3

Which of the following best explains the negative feedback regulation of thyroid-stimulating hormone (TSH) secretion?

Accepted Answer

Elevated thyroid hormone levels inhibit the release of both TRH from the hypothalamus and TSH from the anterior pituitary.

Question 4

A patient with chronic stress is found to have elevated levels of adrenocorticotropic hormone (ACTH). What is the primary effect of ACTH, and which gland does it target?

Accepted Answer

Stimulates the adrenal cortex to release cortisol.

Question 5

Which pancreatic hormone is primarily responsible for lowering blood glucose levels, and what is its main mechanism of action?

Accepted Answer

Insulin; promotes uptake of glucose by cells and stimulates glycogen synthesis.

Endocrine System: Hormone Types and Regulation

Study Guide - Practice Questions

Study Guide - Flashcards