Question 1

Which of the following best describes the pathway of light as it enters the eye and reaches the photoreceptors?

Accepted Answer

Cornea → aqueous humor → lens → vitreous humor → retina

Question 2

A patient is unable to focus on close objects, but can see distant objects clearly. Which of the following best explains this condition?

Accepted Answer

The eyeball is too short, causing the image to focus behind the retina (hyperopia).

Question 3

Which of the following statements about rods and cones in the retina is correct?

Accepted Answer

Rods are more sensitive to dim light and are responsible for peripheral vision, while cones detect color and provide sharp central vision.

Question 4

Which of the following best describes the process of phototransduction?

Accepted Answer

Conversion of light energy into electrical signals by photoreceptors in the retina.

Question 5

A person with damage to the optic chiasm would most likely experience which of the following visual deficits?

Accepted Answer

Loss of peripheral (temporal) vision in both eyes (bitemporal hemianopsia).

Question 6

Which of the following is required for a chemical to be detected as an odor by the olfactory system?

Accepted Answer

The chemical must be volatile and dissolve in the mucus of the olfactory epithelium.

Question 7

Which of the following correctly matches a taste sensation with its associated chemical stimulus?

Accepted Answer

Umami – amino acids such as glutamate

Question 8

Which structure in the ear is primarily responsible for detecting rotational (angular) movements of the head?

Accepted Answer

Crista ampullaris in the semicircular canals

Question 9

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

Accepted Answer

Insulin deficiency from the pancreas

Question 10

Which of the following best distinguishes between lipid-soluble and water-soluble hormones?

Accepted Answer

Lipid-soluble hormones bind to intracellular receptors and act directly on DNA, while water-soluble hormones bind to cell surface receptors and use second messengers.

Question 11

Which of the following correctly matches a gland with a hormone it secretes and the hormone’s primary function?

Accepted Answer

Adrenal cortex – cortisol – increases blood glucose and helps the body respond to stress

Question 12

Which of the following best describes the composition of whole blood after centrifugation?

Accepted Answer

Plasma (about 55%) on top, buffy coat (less than 1%) in the middle, erythrocytes (about 45%) on the bottom

Question 13

A patient with type A negative blood receives type AB positive blood. Which of the following is the most likely outcome?

Accepted Answer

A transfusion reaction due to both anti-B and anti-Rh antibodies attacking the donor blood.

Question 14

Which of the following best explains why red blood cells (RBCs) are biconcave and lack nuclei?

Accepted Answer

The biconcave shape increases surface area for gas exchange, and the lack of nuclei allows more room for hemoglobin.

Question 15

Which of the following best describes the negative feedback control of erythropoiesis?

Accepted Answer

Low oxygen levels stimulate the kidneys to release erythropoietin, which increases RBC production in the bone marrow.

Question 16

Which of the following is a key difference between granulocytes and agranulocytes?

Accepted Answer

Granulocytes contain visible cytoplasmic granules and include neutrophils, eosinophils, and basophils; agranulocytes lack visible granules and include lymphocytes and monocytes.

Question 17

Which of the following correctly lists the steps of hemostasis in the order they occur?

Accepted Answer

Vascular spasm → platelet plug formation → coagulation

Question 18

A patient has a deficiency in clotting factor VIII. Which pathway of coagulation is primarily affected?

Accepted Answer

Intrinsic pathway

Question 19

Which of the following best describes the function of the maculae in the vestibular system?

Accepted Answer

Detects linear acceleration and head position relative to gravity

Question 20

Which of the following best describes the difference between neural, humoral, and hormonal stimulation of endocrine glands?

Accepted Answer

Neural stimulation involves nerve fibers, humoral stimulation involves changes in blood levels of ions or nutrients, and hormonal stimulation involves hormones from other glands.

Study Guidance for ANP: Vision, Sensory Systems, Endocrine, and Blood

Study Guide - Practice Questions

Study Guide - Flashcards