Question 1

Which of the following best describes the difference between the somatic nervous system (SNS) and the autonomic nervous system (ANS) in terms of their motor pathways?

Accepted Answer

The SNS uses a single neuron from the spinal cord to the effector, while the ANS uses a two-neuron chain consisting of preganglionic and postganglionic neurons.

Question 2

A patient is prescribed a beta-adrenergic receptor inhibitor to treat hypertension. Which physiological effect is most likely to occur as a result?

Accepted Answer

Decreased heart rate and reduced force of contraction

Question 3

Which neurotransmitter is released by preganglionic neurons in both the sympathetic and parasympathetic divisions of the ANS?

Accepted Answer

Acetylcholine

Question 4

Which of the following structures does NOT receive dual innervation from both the sympathetic and parasympathetic divisions?

Accepted Answer

Sweat glands

Question 5

A patient presents with difficulty seeing objects up close but can see distant objects clearly. Which condition does this describe, and where is the focal point of light relative to the retina?

Accepted Answer

Hyperopia; focal point is behind the retina

Question 6

Which cranial nerve is primarily responsible for transmitting auditory information from the cochlea to the brain?

Accepted Answer

Cranial nerve VIII (Vestibulocochlear nerve)

Question 7

Which of the following best explains why a corneal transplant is rarely rejected by the recipient's immune system?

Accepted Answer

The cornea lacks blood vessels, reducing immune cell access.

Question 8

Which of the following is a function of the pigmented layer of the retina?

Accepted Answer

Absorbing stray light to prevent scattering within the eye

Question 9

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

Accepted Answer

Semicircular canals

Question 10

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

Accepted Answer

Produces and drains tears to lubricate and protect the eye

Question 11

Which type of receptor is found on the target tissue of most sympathetic effectors and responds to norepinephrine?

Accepted Answer

Adrenergic receptor

Question 12

Which of the following best describes the process of accommodation in the eye when focusing on a near object?

Accepted Answer

The ciliary muscle contracts, suspensory ligaments loosen, and the lens becomes more rounded.

Question 13

Which of the following is a correct sequence for the pathway of aqueous humor in the eye?

Accepted Answer

Ciliary body → posterior chamber → anterior chamber → canal of Schlemm

Question 14

Which of the following best describes the difference between conductive deafness and sensorineural deafness?

Accepted Answer

Conductive deafness results from problems with sound transmission through the outer or middle ear, while sensorineural deafness results from damage to the inner ear or auditory nerve.

Question 15

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

Accepted Answer

Secretes aqueous humor and controls lens shape

Question 16

Which of the following best describes the function of sensory receptors as transducers?

Accepted Answer

They convert one form of energy (stimulus) into electrical signals (action potentials).

Question 17

Which of the following best explains why the optic disc is called the 'blind spot' of the eye?

Accepted Answer

It lacks photoreceptors entirely.

Question 18

Which neurotransmitter is released by postganglionic neurons of the sympathetic division at most target tissues?

Accepted Answer

Norepinephrine

Question 19

Which of the following best describes the effect of the parasympathetic division on the digestive system?

Accepted Answer

Increases gland secretion and motility

Question 20

Which of the following is a correct description of the function of the semicircular canals?

Accepted Answer

Detects rotational (angular) movements of the head

The Autonomic Nervous System and Special Senses: Study Guide

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