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Exploring the Nervous System

Total questions: 45

Worksheet time: 25mins

Name
Class
Date
1.

What is the main function of sensory neurons?

a)

To carry signals from the brain to muscles

b)

To carry signals from sense organs to the brain and spinal cord

c)

To connect two neurons together

d)

To protect the neuron

2.

Which part of the neuron receives messages from other cells?

a)

Axon

b)

Dendrites

c)

Myelin

d)

Synapse

3.

What is the function of myelin in the nervous system?

a)

To slow down nerve signals

b)

To protect and speed up nerve signals

c)

To connect neurons

d)

To create neurotransmitters

4.

Which term refers to the gap between two neurons where messages are passed?

a)

Axon

b)

Synapse

c)

Dendrite

d)

Myelin

5.

What do motor neurons do?

a)

Carry signals from the brain to muscles and glands

b)

Carry signals from the skin to the brain

c)

Connect two neurons together

d)

Protect the brain

6.

What are neurotransmitters?

a)

Electrical signals in the brain

b)

Chemicals that carry messages across synapses

c)

Parts of the axon

d)

Types of neurons

7.

Which part of the neuron sends messages away from the cell body?

a)

Dendrite

b)

Axon

c)

Synapse

d)

Myelin

8.

What does the prefix "neuro-" mean?

a)

Muscle

b)

Nerve

c)

Bone

d)

Blood

9.

Which of the following best describes nerves?

a)

Single cells in the brain

b)

Bundles of axons that carry signals in the body

c)

Chemicals in the brain

d)

Protective layers around the brain

10.

What is the main job of dendrites?

a)

To send signals to other neurons

b)

To receive signals from other neurons

c)

To protect the neuron

d)

To create myelin

11.

Which part of the neuron is covered by myelin?

a)

Dendrite

b)

Axon

c)

Synapse

d)

Cell body

12.

If a neuron did not have myelin, what would most likely happen to the nerve signal?

a)

It would travel faster

b)

It would travel slower

c)

It would not be affected

d)

It would become a chemical signal

13.

Which of the following best explains how neurotransmitters work?

a)

They carry electrical signals along the axon

b)

They jump across the synapse to send messages to the next neuron

c)

They protect the neuron from damage

d)

They create myelin

14.

How do motor neurons help you move your hand?

a)

By sending signals from your hand to your brain

b)

By sending signals from your brain to your hand muscles

c)

By creating myelin around your hand

d)

By producing neurotransmitters in your hand

15.

If a person touches a hot stove, which type of neuron first detects the heat?

a)

Motor neuron

b)

Sensory neuron

c)

Dendrite

d)

Myelin

16.

Why is the synapse important for communication between neurons?

a)

It speeds up the signal

b)

It allows chemical messages to pass from one neuron to another

c)

It creates myelin

d)

It protects the axon

17.

What would happen if neurotransmitters could not cross the synapse?

a)

Signals would travel faster

b)

Signals would not reach the next neuron

c)

Myelin would be created

d)

Dendrites would grow longer

18.

Which of the following is a correct sequence for how a nerve signal travels?

a)

Dendrite → Axon → Synapse

b)

Axon → Dendrite → Synapse

c)

Synapse → Axon → Dendrite

d)

Myelin → Synapse → Dendrite

19.

If a nerve is damaged, which function might be affected?

a)

The ability to think

b)

The ability to send signals quickly through the body

c)

The ability to digest food

d)

The ability to see

20.

Why do nerves need to be bundled together in the body?

a)

To make the body heavier

b)

To protect the axons and help signals travel together

c)

To create more neurotransmitters

d)

To slow down signals

21.

A student is looking at a diagram of a neuron. Which feature should they look for to identify the axon?

a)

The short, branch-like parts

b)

The long, thin part extending from the cell body

c)

The round center part

d)

The gap between two neurons

22.

If a disease destroys myelin, what symptoms might a person have?

a)

Faster reflexes

b)

Slower movement and weaker muscles

c)

Better memory

d)

Increased sense of smell

23.

A scientist wants to block the action of neurotransmitters in the brain. What effect would this have on nerve communication?

a)

Nerve signals would stop passing between neurons

b)

Nerve signals would travel faster

c)

Myelin would be created

d)

Dendrites would grow longer

24.

Imagine a person cannot feel pain in their hand. Which part of their nervous system is most likely not working correctly?

a)

Motor neurons

b)

Sensory neurons

c)

Myelin

d)

Synapse

25.

A student is designing a model of a neuron. Which materials should they use to represent the myelin sheath, and why?

a)

Use thin string, because myelin is thin

b)

Use soft foam, because myelin is a protective, insulating layer

c)

Use metal wire, because myelin is hard

d)

Use paper, because myelin is flat

26.

If a person’s motor neurons are damaged, what might they have trouble doing?

a)

Smelling flowers

b)

Moving their arms and legs

c)

Hearing sounds

d)

Seeing colors

27.

A doctor is testing a patient’s reflexes. Which pathway does the signal follow from the knee to the brain and back to the muscle?

a)

Motor neuron → Sensory neuron → Synapse

b)

Sensory neuron → Brain → Motor neuron

c)

Dendrite → Myelin → Axon

d)

Synapse → Axon → Dendrite

28.

Why is it important for neurotransmitters to be quickly removed from the synapse after they send a message?

a)

To keep the signal going forever

b)

To prevent the next neuron from being overstimulated

c)

To create more myelin

d)

To make the axon longer

29.

A student claims that all nerves in the body are the same. How would you explain the difference between sensory and motor nerves to them?

a)

Sensory nerves carry signals to the brain, motor nerves carry signals from the brain to muscles

b)

Both carry signals only to the brain

c)

Both carry signals only to muscles

d)

Both are only found in the brain

30.

If a person’s synapses are blocked by a drug, what would most likely happen to their nervous system function?

a)

Signals would travel faster

b)

Signals would not be able to pass from one neuron to another

c)

Myelin would be destroyed

d)

Dendrites would grow longer

31.

Which part of the neuron receives signals from other neurons?

a)

Axon

b)

Cell Body

c)

Dendrites

d)

Synapse

32.

This is a picture of the 

a)

peripheral nervous sysyem

b)

central nervous system

c)

respiratory system

d)

circulatory system

33.

What is the gap, or space, between two neurons called?

a)

Axon

b)

Dendrite

c)

Synapse

d)

Myelin Sheath

34.
Label the Neuron-What does the letter "H" represent?
a)
Myelin Sheath
b)
Axon
c)
Axon Terminal
d)
Dendrite
35.
Label the Neuron-What does the letter "F" represent?
a)
Myelin Sheath
b)
Axon
c)
Axon Terminal
d)
Dendrite
36.
A
a)
Dendrite
b)
Axon
c)
Axon Terminal
d)
Cell Body
37.
Label the Neuron-What does the letter "C" represent?
a)
Dendrite
b)
Axon
c)
Axon Terminal
d)
Cell Body
38.
Label the Neuron-What does the letter "A" represent?
a)
Dendrite
b)
Axon
c)
Myelin Sheath
d)
Node of Ranvier
39.
What is number 1?
a)
dendrite 
b)
axon
c)
cell body
d)
myelin sheath
40.

As organisms get more complex, cells become specialized to perform specific functions in the body. What is the function for the cell shown?

a)

contract and shorten movement

b)

provide coverage and protection

c)

carry impulses around the body

d)

connects parts together

41.

What is a Neuron?

a)

A cell

b)

A transmitter to transmit messages to cells

c)

A receiver for information

d)

a gland

42.
The nerves in your legs are part of the ____ nervous system.
a)
Central 
b)
Peripheral
43.
What is number 4?
a)
dendrite
b)
axon 
c)
cell body
d)
myelin sheath
44.
What is number 5?
a)
cell body
b)
nucleus
c)
axon terminal
d)
synapes
45.
What type of cell gathers and carries information?
a)
Nerve Ending
b)
Sense Organ
c)
Sensory Cell
d)
Nerve Cell