Question 1

Which of the following best describes the role of Natural Killer (NK) cells in the innate immune system?

Accepted Answer

They directly lyse virus-infected and tumor cells without prior sensitization.

Question 2

A patient is diagnosed with an autoimmune disease. Which of the following best explains the underlying mechanism?

Accepted Answer

The immune system attacks self-antigens, mistaking them for foreign invaders.

Question 3

Which hormone is released by the posterior lobe of the pituitary gland and is responsible for water reabsorption in the kidneys?

Accepted Answer

Antidiuretic hormone (ADH)

Question 4

A person drinks a lot of alcoholic beverages and must urinate frequently. Which physiological mechanism best explains this phenomenon?

Accepted Answer

Alcohol inhibits the release of antidiuretic hormone (ADH), reducing water reabsorption in the kidneys.

Question 5

Which of the following hormones is lipid-soluble and forms a hormone-receptor complex inside the cytosol?

Accepted Answer

Aldosterone

Question 6

Which structure in the ear is responsible for equalizing atmospheric pressure between the middle ear and the environment?

Accepted Answer

Eustachian tube

Question 7

A man is told he is NOT synthesizing follicle-stimulating hormone (FSH). Which physiological consequence is most likely?

Accepted Answer

He may be unable to produce mature sperm and father a child.

Question 8

Which of the following best describes the difference between passive and active immunity?

Accepted Answer

Active immunity results from exposure to antigens and the production of memory cells, while passive immunity is acquired by receiving antibodies from another source.

Question 9

Which of the following is the correct sequence of structures that light passes through before reaching the retina?

Accepted Answer

Cornea → Aqueous humor → Lens → Vitreous humor → Retina

Question 10

Which hormone uses a second messenger system to exert its effects?

Accepted Answer

Insulin

Question 11

A patient presents with gradual hearing loss, tinnitus, and vertigo. Which disorder is most likely?

Accepted Answer

Meniere's disease

Question 12

Which of the following is TRUE regarding the elasticity of the lens and its effect on vision as people age?

Accepted Answer

Decreased lens elasticity leads to presbyopia, making it difficult to focus on near objects.

Question 13

Which of the following best describes the function of the iris?

Accepted Answer

It regulates the amount of light entering the eye by adjusting the size of the pupil.

Question 14

Sound is generally perceived in which lobe of the cerebral cortex?

Accepted Answer

Temporal lobe

Question 15

Which of the following is a complete antigen?

Accepted Answer

A molecule that can both bind to antibodies and trigger an immune response.

Question 16

A nurse is administering Pilocarpine eye drops. The nurse instructs the patient to press on the medial canthus for 1-2 minutes. What is the rationale for this instruction?

Accepted Answer

To prevent the medication from entering the lacrimal duct and systemic circulation.

Question 17

Which of the following best explains why many people require reading glasses as they age?

Accepted Answer

The lens loses elasticity, making it difficult to focus on near objects (presbyopia).

Question 18

Which of the following is the primary function of cerumen (earwax)?

Accepted Answer

To protect the ear canal by trapping dust and microorganisms.

Question 19

Which of the following best describes the feedback loop responsible for goiter formation in iodine-deficiency?

Accepted Answer

Low iodine leads to decreased thyroid hormone, causing increased TSH release and thyroid gland enlargement.

Question 20

Which of the following structures regulates the amount of light passing to the visual receptors of the eye?

Accepted Answer

Iris

Comprehensive Study Notes: Immunity, Endocrine System, and Special Senses

Study Guide - Practice Questions

Study Guide - Flashcards