The nervous system

Question 1

3 main functions of the NS

Answer 1

Receive info, process info, coordinate a response.

Question 2

Brain

Answer 2

The brain is responsible for virtually everything we do.

Question 3

Spinal cord

Answer 3

Receives sensory info from the body and to the brain. Also receives motor info from the brain and sends it to relevant parts of the body.

Question 4

Central NS

Answer 4

Transmits info to and from Peripheral NS

Question 5

Peripheral NS

Answer 5

Transmits info to and from the Central NS

Question 6

Somatic NS

Answer 6

Carries messages from sensory receptors in the body to the Central NS, and motor messages from the Central NS to skeletal muscles.

Question 7

Autonomic NS

Answer 7

Connects Central NS to internal organs and glands.

Question 8

Sympathetic NS + Parasympathetic NS

Answer 8

S- prepares body for action.

P- calms body after action.

Question 9

Spinal reflex (4 steps)

Answer 9

1. Sensory receptors detect harm + send message to the spinal cord.
2. Interneuron relays message to motor neurons that movement needs to happen.
3. Motor message sent to relevant skeletal muscles to withdraw.
4. Message is sent to the brain and processed as pain.