Question 1

Which of the following best describes the process of depolarization in a neuron during the conduction of a nerve impulse?

Accepted Answer

Sodium ions rapidly enter the neuron, making the inside more positive.

Question 2

Which part of the nervous system is responsible for voluntary muscle movement?

Accepted Answer

Somatic Nervous System

Question 3

A patient is unable to regulate their heart rate and digestion after a car accident. Which division of the nervous system is most likely affected?

Accepted Answer

Autonomic Nervous System

Question 4

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

Accepted Answer

Acetylcholine

Question 5

What is the primary function of myelin in the nervous system?

Accepted Answer

To increase the speed of nerve impulse conduction

Question 6

Which of the following best describes the difference between white matter and gray matter in the brain?

Accepted Answer

White matter contains myelinated axons; gray matter contains mostly neuron cell bodies.

Question 7

During repolarization of a neuron, which ion movement is primarily responsible for restoring the resting membrane potential?

Accepted Answer

Efflux of potassium ions ($$\mathrm{K^+})$$

Question 8

Which structure in the brain is primarily responsible for regulating basic life functions such as breathing and heart rate?

Accepted Answer

Medulla oblongata

Question 9

A person is experiencing difficulty with memory and learning. Which part of the brain is most likely affected?

Accepted Answer

Hippocampus

Question 10

Which of the following is a correct sequence of events during the conduction of an action potential?

Accepted Answer

Depolarization → Repolarization → Hyperpolarization

Question 11

Which of the following best describes the role of enzymes in neurotransmitter function at the synapse?

Accepted Answer

Enzymes break down neurotransmitters to terminate the signal.

Question 12

Which of the following is a function of the sympathetic nervous system?

Accepted Answer

Dilating pupils

Question 13

A patient presents with myopia (nearsightedness). Which part of the eye is most likely not focusing light correctly?

Accepted Answer

Lens

Question 14

Which of the following is NOT a function of the temporal lobe?

Accepted Answer

Regulating balance and coordination

Question 15

Which of the following best describes the role of sensory neurons in the somatic nervous system?

Accepted Answer

Transmit signals from sensory receptors to the central nervous system

Question 16

Which part of the ear is responsible for converting sound waves into electrical signals for the brain?

Accepted Answer

Inner ear (cochlea)

Question 17

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

Accepted Answer

Thermoreceptors

Question 18

Which of the following best explains the difference between the sympathetic and parasympathetic nervous systems?

Accepted Answer

Sympathetic system prepares the body for 'fight or flight'; parasympathetic system promotes 'rest and digest'.

Question 19

Which of the following is the correct pathway for a reflex arc in the somatic nervous system?

Accepted Answer

Sensory receptor → Sensory neuron → Interneuron → Motor neuron → Effector

Question 20

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

Accepted Answer

Occipital lobe

Unit 1: Nervous System – Structured Study Notes

Study Guide - Practice Questions