Question 1

Which nerve is responsible for innervating the biceps brachii muscle and is a major branch of the brachial plexus?

Accepted Answer

Musculocutaneous nerve

Question 2

At the neuromuscular junction, which neurotransmitter is released from the synaptic vesicles to stimulate muscle contraction?

Accepted Answer

Acetylcholine (ACh)

Question 3

Which connective tissue layer surrounds individual axons within a nerve?

Accepted Answer

Endoneurium

Question 4

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

Accepted Answer

Musculocutaneous nerve

Question 5

Which nerve is most likely to be affected in carpal tunnel syndrome, resulting in numbness and tingling in the lateral hand?

Accepted Answer

Median nerve

Question 6

Which structure is responsible for the propagation of action potentials along the axon in a myelinated neuron?

Accepted Answer

Schwann cells

Question 7

Which equation best describes the relationship between membrane potential and ion concentrations across the membrane?

Accepted Answer

$$ V_m = \frac{RT}{F} \ln \left( \frac{[K^+]_{out}}{[K^+]_{in}} \right) $$

Question 8

During a reflex arc, which structure acts as the effector?

Accepted Answer

Muscle (e.g., biceps brachii)

Question 9

Which nerve is formed from the ventral rami of L4-S3 and is the largest nerve in the body?

Accepted Answer

Sciatic nerve

Question 10

Which lobe of the brain is primarily responsible for processing visual information?

Accepted Answer

Occipital lobe

Question 11

A lesion in the precentral gyrus would most likely result in which deficit?

Accepted Answer

Impaired motor function

Question 12

Which cranial nerve is responsible for transmitting auditory and balance information from the inner ear to the brain?

Accepted Answer

Vestibulocochlear nerve (VIII)

Question 13

Which structure connects the two cerebral hemispheres and allows communication between them?

Accepted Answer

Corpus callosum

Question 14

Which equation represents the calculation of conduction velocity in a myelinated axon?

Accepted Answer

$$ v = \sqrt{\frac{d}{R_m \cdot C_m}} $$

Question 15

Damage to the axillary nerve would most likely result in weakness of which muscle?

Accepted Answer

Deltoid

Question 16

Which cranial nerve is responsible for eye movement and is labeled as cranial nerve III?

Accepted Answer

Oculomotor nerve

Question 17

Which structure is responsible for the production of cerebrospinal fluid (CSF) in the brain?

Accepted Answer

Choroid plexus

Question 18

Which equation best describes Ohm's law as applied to nerve conduction?

Accepted Answer

$$ V = IR $$

Question 19

Which brain structure is involved in regulating vital functions such as heart rate and breathing?

Accepted Answer

Medulla oblongata

Question 20

Which nerve is most likely to be injured in a fracture of the surgical neck of the humerus?

Accepted Answer

Axillary nerve

Study Notes: The Nervous System – Structure, Function, and Organization

Study Guide - Practice Questions