The nervous system and functions

Question 1

What is the Nervous system

Answer 1

System of nerves and cells that carries messages around body.

Question 2

The central Nervous system is made of two parts

Answer 2

CNS- Central nervous sustem
PNS- Peripheral Nervous sysetm

Question 3

What is The CNS
What does it do

Answer 3

= composed of the spinal cord and brain

Functions
- Spinal cord allows brain to COMMUNICATE with the rst of body
- Runs from base of ( Brainstem) to lower back

Question 4

What is The PNS
What does it do

Answer 4

= is any nerve outside the brain and spinal cord

Functions
1. Communicate info from organs, glands, muscles ——> Brain

2. Communicate info from
   Brain ——> Organs, muscles, glands

Question 5

PNS has Two subdivisions such as:

Answer 5

Somatic—— Automatic

Question 6

Somatic

Answer 6

Responsible for carrying messengers from the BRAin —-> SKELETAL muscles

• Voluntary movement
• messengers from senses to brain to be processed

Question 7

Somatic

( Motor Nuerons ( nerves) )

Answer 7

• Directly attached to muscles
• Initiates voluntary movement
• Communicates to CNS

Question 8

Somatic

( Sensory nuerons ( nerves))

Answer 8

• Carry messengers from senses to CNS so the brain can INTERACT with it’s ENVIROMENT.

Question 9

Automatic nervous system

Answer 9

Controls body’s NON-skeletal muscles ( eg. heart, pupils, internal organs, glands)

( It does everything we DON’T think about)

Question 10

Automatic

Sympathetic nervous system

Answer 10

• Prepares us for actions
• Fight or flight
• freeze

Question 11

Automatic

Parasympathetic nervous system

Answer 11

• Calms our body
• returns us to baseline/ normal
  ( homeostasis)