$$E = \frac{RT}{zF} \ln \left( \frac{[\text{ion}]_{\text{outside}}}{[\text{ion}]_{\text{inside}}} \right)$$

Question 1

Which of the following best describes the primary function of the autonomic nervous system as part of the Peripheral Nervous System?

Accepted Answer

It regulates involuntary functions such as heart rate, digestion, and respiratory rate.

Question 2

A patient presents with difficulty breathing due to paralysis of the diaphragm. Which nerve is most likely affected?

Accepted Answer

Phrenic nerve

Question 3

Which of the following is NOT a function of cerebrospinal fluid (CSF)?

Accepted Answer

Facilitating the transmission of nerve impulses

Question 4

Which equation best represents the Nernst equation used to calculate the equilibrium potential for an ion across a neuronal membrane?

Accepted Answer

$$E = \frac{RT}{zF} \ln \left( \frac{[	ext{ion}]_{	ext{outside}}}{[	ext{ion}]_{	ext{inside}}} ight)$$

Question 5

Which of the following best explains why myelinated neurons conduct impulses faster than non-myelinated neurons?

Accepted Answer

Myelinated neurons use saltatory conduction, allowing action potentials to jump between nodes of Ranvier.

Question 6

A patient is unable to taste food and has difficulty swallowing. Which cranial nerve is most likely impaired?

Accepted Answer

Glossopharyngeal nerve (IX)

Question 7

Which of the following is a correct sequence of events during synaptic transmission at a chemical synapse?

Accepted Answer

Action potential arrives, neurotransmitter released, postsynaptic receptor activated, postsynaptic potential generated.

Question 8

Which neurotransmitter is primarily involved in the regulation of mood and is commonly targeted by antidepressant medications?

Accepted Answer

Serotonin

Question 9

Which of the following structures is responsible for maintaining homeostasis and regulating body temperature?

Accepted Answer

Hypothalamus

Question 10

A reflex arc typically involves which sequence of neuron types?

Accepted Answer

Sensory neuron → Interneuron → Motor neuron

Question 11

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

Accepted Answer

Coordination of voluntary movements and balance

Question 12

Which meningeal layer is located directly beneath the skull and provides a tough protective covering for the brain?

Accepted Answer

Dura mater

Question 13

Which of the following is a correct description of the flow of cerebrospinal fluid (CSF) through the ventricles of the brain?

Accepted Answer

Lateral ventricles → Third ventricle → Fourth ventricle → Subarachnoid space

Question 14

Which of the following equations correctly represents Ohm's Law as applied to nerve conduction?

Accepted Answer

$$I = \frac{V}{R}$$

Question 15

Which of the following is NOT a function of the vagus nerve?

Accepted Answer

Sensory input from the skin of the face

Question 16

A patient with damage to the frontal lobe of the brain is most likely to experience which of the following symptoms?

Accepted Answer

Impaired decision-making and personality changes

Question 17

Which of the following best describes the role of interneurons in the nervous system?

Accepted Answer

They connect sensory and motor neurons within the central nervous system.

Question 18

Which neurotransmitter is most commonly associated with the neuromuscular junction and muscle contraction?

Accepted Answer

Acetylcholine

Question 19

Which of the following mechanisms is primarily responsible for the rapid repolarization phase of the neuronal action potential?

Accepted Answer

Opening of voltage-gated potassium channels

Question 20

A person touches a hot stove and immediately withdraws their hand. Which type of response is this, and which neurons are involved?

Accepted Answer

Reflex response involving sensory, interneuron, and motor neurons

Unit 8: Comprehensive Study Guide: Nervous System Structure and Function

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