Question 1

Which of the following best describes the function of the melanin pigment in the vascular tunic of the eye?

Accepted Answer

It absorbs extraneous light to prevent scattering within the eye.

Question 2

A patient presents with loss of sensation in a specific dermatome. Which of the following best explains the clinical significance of this finding?

Accepted Answer

It indicates possible damage to a specific spinal nerve root.

Question 3

Which type of sensory receptor is primarily responsible for detecting changes in blood pressure within major arteries?

Accepted Answer

Interoceptors

Question 4

A person is able to sense the position of their limbs even with their eyes closed. Which type of receptor is most directly involved in this process?

Accepted Answer

Proprioceptors

Question 5

Which of the following best describes the difference between tonic and phasic receptors?

Accepted Answer

Tonic receptors adapt slowly to stimuli, while phasic receptors adapt rapidly.

Question 6

Which of the following is a function of the ciliary body in the eye?

Accepted Answer

It produces aqueous humor and changes the shape of the lens.

Question 7

A patient is unable to produce tears, resulting in dry eyes. Which structure is most likely malfunctioning?

Accepted Answer

Lacrimal gland

Question 8

Which of the following best describes the function of the neural layer of the retina?

Accepted Answer

It converts light into nerve impulses sent via the optic nerve.

Question 9

Which of the following tactile receptors is unencapsulated and responds to light touch?

Accepted Answer

Tactile (Merkel) discs

Question 10

A person is exposed to a constant stimulus, such as wearing a watch, and eventually stops noticing it. Which property of sensory receptors explains this phenomenon?

Accepted Answer

Adaptation

Question 11

Which of the following best describes the function of the fibrous tunic of the eye?

Accepted Answer

It provides structural support and protects delicate internal components.

Question 12

Which of the following is a correct classification of sensory receptors based on the type of stimulus detected?

Accepted Answer

Chemoreceptors detect molecules in solution.

Question 13

A patient has difficulty focusing on near objects due to inability to change the shape of the lens. Which structure is most likely affected?

Accepted Answer

Ciliary body

Question 14

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

Accepted Answer

It acts as a diaphragm to control pupil size.

Question 15

Which of the following is true regarding encapsulated tactile receptors?

Accepted Answer

Lamellated corpuscles detect deep pressure and high-frequency vibration.

Question 16

A person is unable to distinguish between hot and cold objects. Which type of receptor is most likely malfunctioning?

Accepted Answer

Thermoreceptors

Question 17

Which of the following best describes the function of the lacrimal apparatus?

Accepted Answer

It produces, distributes, and removes tears.

Question 18

Which of the following best explains why the cornea is transparent?

Accepted Answer

It lacks blood vessels and has a regular arrangement of collagen fibers.

Question 19

A patient presents with loss of deep pressure sensation in the skin. Which receptor is most likely damaged?

Accepted Answer

Lamellated (Pacinian) corpuscles

Question 20

Which of the following best describes the optic disc?

Accepted Answer

It is the region where the optic nerve exits the eye and contains no photoreceptors.

General and Special Senses: Sensory Receptors and the Eye

Study Guide - Practice Questions

Study Guide - Flashcards