AnswersCO-Biology B-CRUnit Test

The Nervous System Answers

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When Gretchen starts being chased by a dog, her brain sends a signal to her muscles to run. Which neurons are at work?

A
sensory neurons
B
motor neurons
C
voluntary neurons
D
involuntary neurons
2
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The sympathetic and parasympathetic nervous systems are both part of which division of the nervous system?

A
the central nervous system
B
the peripheral nervous system
C
the somatic nervous system
D
the autonomic nervous system
3

Which structure(s) are connected to the peripheral nervous system? Select all that apply.

A
a vertebral column
B
a sense organ
C
a muscle
D
a gland
E
a bone
4

What happens to the body when motor neurons are injured?

A
It releases more neurotransmitters.
B
It loses muscle movement.
C
It experiences increased stimuli.
D
It shows a decrease in inflammation.
5

The diagram shows a nerve cell.

Question illustration
A
A
B
B
C
C
D
D
6

Which is an example of when Hector's somatic sensory system is in control?

A
After a long run, his body is sweating.
B
When jogging, he sees an ice patch and decides to change directions to a different route.
C
His eyes dilate because he sees something scary.
D
He eats a large meal and his body takes multiple hours to digest it.
7

Which is an example of how the peripheral nervous system helps the body maintain its internal environment?

A
Muscles produce keratin so that hair can grow stronger.
B
Sweat glands break down the food that is consumed.
C
Muscles contract rapidly to produce heat on a cold day.
D
The brain recalls information to help take a test.
8

Which structure is at work when the body deals with reflex actions?

A
the heart
B
the brain stem
C
the vertebral column
D
the spinal cord
9

Examine the words.impulse, presynaptic cell, neurotransmitters, receptors, postsynaptic cellWhat idea can be described using all the words listed?

A
the difference between the somatic and autonomic nervous systems
B
the transfer of information from one neuron to another
C
the difference between the central and peripheral nervous systems
D
the flow of information within a neuron
10

Which function does a neuron perform in a human body?

A
It generates electrochemical signals so that the body can react to stimuli.
B
It produces antibodies to destroy pathogens for protection purposes.
C
It breaks down chemical substances into a form that is usable by the body.
D
It delivers oxygen to the cells of the body for metabolic processes.

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