Chapter 5 - The Nervous System
Click on the correct answer
1
The central nervous system consists of the ________ and the ________.
left cerebral hemisphere; right cerebr
brain; spinal cord
sympathetic nervous system; parasympathetic nervous system
brain; peripheral nervous system
2
The elementary units of the nervous system are called:
neurons.
nerves.
ganglia.
nuclei.
3
The function of sensory neurons is to:
organize and integrate information in the central nervous system.
carry information to the central nervous system.
transmit messages between motor neurons.
transmit messages from motor neurons to interneurons.
4
Neurons that exist completely within the central nervous system are called:
motor neurons.
interneurons.
sensory neurons.
nerves.
5
The most numerous neurons in the human nervous system are:
motor neurons.
interneurons.
sensory neurons.
peripheral neurons.
6
Neurons that carry messages to muscles and glands are called:
motor neurons.
interneurons.
sensory neurons.
both b. and c.
7
Which part of a motor neuron is specialized to receive signals from other neurons?
axon
dendrites
synaptic vesicles
axon terminals
8
The thin, tubelike branches that increase the surface area of the neuron to better receive signals from other neurons are called:
axons.
myelin sheaths.
synapses.
dendrites.
9
Which part of the neuron releases neurotransmitters onto receiving cells?
axon terminals
dendrites
nuclei
action potentials
10
The tightly wrapped casing around the axon in some neurons is called a(n):
dendrite.
myelin sheath.
ganglion.
axon terminal.