Question 1

Which of the following best describes the function of a dermatome map in clinical practice?

Accepted Answer

It maps the distribution of sensory innervation from spinal nerves across the skin.

Question 2

A patient touches a hot stove and immediately withdraws their hand. Which element of the reflex arc is responsible for transmitting the sensory information to the central nervous system?

Accepted Answer

Sensory neuron

Question 3

Which of the following is TRUE regarding the cross extensor reflex?

Accepted Answer

It causes extension of the opposite limb to support body weight during withdrawal.

Question 4

The Golgi tendon reflex is primarily responsible for:

Accepted Answer

Protecting muscles from excessive tension by causing relaxation.

Question 5

Which nerve plexus is responsible for innervating the lower limbs?

Accepted Answer

Lumbar plexus

Question 6

Which of the following best describes receptor adaptation?

Accepted Answer

Receptors stop responding to a constant stimulus over time.

Question 7

During the 'fight or flight' response, which neurotransmitter is primarily released by postganglionic sympathetic neurons?

Accepted Answer

Norepinephrine

Question 8

Which of the following is a characteristic effect of the parasympathetic nervous system?

Accepted Answer

Stimulation of digestive secretions

Question 9

Muscarinic receptors are primarily activated by which neurotransmitter?

Accepted Answer

Acetylcholine

Question 10

A patient presents with loss of sensation in the lateral forearm. Which spinal nerve is most likely affected?

Accepted Answer

C6

Question 11

Which structure in the eye is responsible for accommodation, allowing the eye to focus on near objects?

Accepted Answer

Lens

Question 12

The crista ampullaris is found in which part of the ear, and what is its primary function?

Accepted Answer

Semicircular canals; sensing rotational movement

Question 13

Which formula best represents the relationship between frequency ($$f$$), wavelength ($$\lambda$$), and speed of sound ($$v) in $$the cochlea?

Accepted Answer

$$v = f 	imes \lambda$$

Question 14

Damage to the basilar membrane would most likely result in:

Accepted Answer

Impaired hearing

Question 15

Which cranial nerve is responsible for transmitting visual information from the retina to the brain?

Accepted Answer

Optic nerve (II)

Question 16

A patient with damage to the splanchnic nerves would most likely experience problems with:

Accepted Answer

Autonomic regulation of abdominal organs

Question 17

Which equation best describes the relationship between stimulus intensity ($$I) $$and receptor potential ($$V) in a $$sensory neuron?

Accepted Answer

$$V = k 	imes I$$

Question 18

Which structure is responsible for detecting rotational movements of the head?

Accepted Answer

Crista ampullaris

Question 19

Which of the following best describes the pathway for olfactory sensation?

Accepted Answer

Olfactory receptors → olfactory bulb → olfactory tract → cerebral cortex

Question 20

Which cranial nerve is primarily responsible for the sense of taste on the anterior two-thirds of the tongue?

Accepted Answer

Facial nerve (VII)

BIO168 Lecture Unit 4 Exam Study Guide – Step-by-Step Guidance

Study Guide - Practice Questions

Study Guide - Flashcards