10. Nervous System

Question 1

What is the role of the human nervous system?

Answer 1

Manage complex behaviors and process sensory information

Question 2

What are the two main components of the nervous system?

Answer 2

• Central nervous system
• Peripheral nervous system

Question 3

Identify

Structure that transmit information between the central nervous system and various regions of the body

Answer 3

Nerve

Question 4

Identify

Specialized nerve cell in the nervous system that receives and transmits messages from senses to brain and brain to muscles.

Answer 4

Neuron

Question 5

What are the the main parts of a neuron?

You need to know how to label the different parts.

Answer 5

• Cell body
• Dendrites
• Axon
• Axon terminals

The synapse is at the end of the dendrite.

Question 6

Describe neuron’s role (3 parts)

Answer 6

1. Capture message/stimuli.
2. Transform stimuli into nerve impulses.
3. Transmit nerve impulses from axon to axon terminal.

Question 7

What is a stimulus?

Answer 7

Anything that can be perceived by a living organism and that can trigger a reaction.
ex: sound, light, hormones

Question 8

Identify

Electrical signal transmitted by a neuron

Answer 8

Nerve impulse

Question 9

Neurons can be stimulated: they reacts to a stimulus by changing it into an _____

Answer 9

nerve impulse (an electric signal).

Question 10

Fill the blanks by matching the neuron parts with their role.

1. ____ receives a stimuli and transforms them into nerve impulses.
2. Nerve impulses are transmitted along ____ to _____
3. The end of the axon releases chemicals called neurotransmitters that diffuse across the ____ and touch the dendrite of another cell to pass messages along.

word bank: axon, axon terminals, dentrite, synapse

Answer 10

Dendrite
axons
axon terminals
synapse

Question 11

What are neurotransmitters?

Answer 11

Chemical substances secreted by axon terminals into the synapse that enable the transmission of nerve impulses.

Question 12

Identify

Transition zone between two neurons that allows a nerve impulse to be transmitted

Answer 12

Synapse

Question 13

What is the speed at which nerve impulses can travel?

Answer 13

Up to 430 km/h.

Question 14

Identify

Group of neurons connected together and covered by protective tissue and blood vessel responsible for the tranmission of nerve impulse from one part of the body to another.

Answer 14

Nerve

Question 15

Fill in the blank: A neuron can only survive a few minutes without _______.

Answer 15

[oxygen]

Question 16

True or False: Neurons can be replaced if destroyed.

Answer 16

False.