Question 1

Which of the following best describes the sequence of events at a chemical synapse when an action potential arrives at the presynaptic terminal?

Accepted Answer

Neurotransmitters are released into the synaptic cleft, bind to receptors on the postsynaptic membrane, and trigger an action potential in the postsynaptic neuron.

Question 2

Which of the following is a major characteristic of nervous systems in complex animals compared to simple animals?

Accepted Answer

Complex animals have a centralized nervous system with a brain and spinal cord.

Question 3

Which of the following best distinguishes the nervous system organization in cnidarians (e.g., jellyfish) from that in vertebrates?

Accepted Answer

Cnidarians have a nerve net, while vertebrates have a central nervous system.

Question 4

Which of the following is NOT a function of the central nervous system (CNS) in vertebrates?

Accepted Answer

Transmitting signals from the CNS to muscles and glands.

Question 5

Which region of the vertebrate brain is primarily responsible for regulating basic life functions such as breathing and heart rate?

Accepted Answer

Medulla oblongata

Question 6

Which of the following best describes the difference between sensory neurons and motor neurons?

Accepted Answer

Sensory neurons transmit information from sensory receptors to the CNS, while motor neurons transmit information from the CNS to effectors.

Question 7

A patient suffers a stroke that damages the cerebellum. Which of the following symptoms would most likely result?

Accepted Answer

Loss of coordination and balance

Question 8

Which equation best represents the movement of ions during the generation of an action potential in a neuron?

Accepted Answer

$$\Delta V = V_{Na^+} - V_{K^+}$$

Question 9

Which of the following is a structural category of neurons based on the number of processes extending from the cell body?

Accepted Answer

Multipolar neuron

Question 10

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

Accepted Answer

They connect sensory and motor neurons within the CNS.

Question 11

Which of the following is a key difference between the central nervous system (CNS) and the peripheral nervous system (PNS)?

Accepted Answer

The CNS consists of the brain and spinal cord, while the PNS consists of nerves and ganglia outside the CNS.

Question 12

Which of the following best explains why neurotransmitters are necessary for communication at chemical synapses?

Accepted Answer

Neurotransmitters bridge the gap between neurons by binding to receptors on the postsynaptic membrane.

Question 13

Which of the following is a functional category of neurons based on the direction of information flow?

Accepted Answer

Sensory neuron

Question 14

Which of the following best describes the function of the thalamus in the vertebrate brain?

Accepted Answer

It acts as a relay station for sensory information.

Question 15

Which of the following is a real-world example of the importance of the peripheral nervous system (PNS)?

Accepted Answer

A person quickly withdraws their hand from a hot stove due to sensory and motor nerves in the PNS.

Question 16

Which of the following best explains why simple animals like flatworms can survive with a less complex nervous system?

Accepted Answer

Their behaviors and environments require less processing and integration of information.

Question 17

Which of the following equations best represents the resting membrane potential of a neuron?

Accepted Answer

$$V_{rest} = -70\ \mathrm{mV}$$

Question 18

Which of the following is a characteristic of a multipolar neuron?

Accepted Answer

It has one axon and multiple dendrites.

Question 19

Which of the following best describes the function of the cerebral cortex?

Accepted Answer

It is involved in higher cognitive functions such as reasoning and memory.

Question 20

Which of the following best explains the importance of myelin in the nervous system?

Accepted Answer

Myelin increases the speed of action potential conduction along the axon.

Nervous System Organization and Neuron Function: Study Guide

Study Guide - Practice Questions

Study Guide - Flashcards