A.C 1.1 - Explain How The Main Parts Of The Nervous System Relates To Its Functions Flashcards Preview

Nervous System > A.C 1.1 - Explain How The Main Parts Of The Nervous System Relates To Its Functions > Flashcards

Flashcards in A.C 1.1 - Explain How The Main Parts Of The Nervous System Relates To Its Functions Deck (12):
1

What is the nervous system and what is it responsible for?

- system works closely with endocrine system to maintain homeostasis
- responsible for perception, behaviour, voluntary movement

2

What does the CNS contain?

Brain, spinal cord

3

How many cranial nerves are there?

12 pairs

4

How many spinal nerves are there?

31 pairs

5

What are ganglia?

Cell bodies

6

What is the PNS and what does it contain?

- the nerves in the rest of the body

(Cranial, spinal, ganglia, sensory receptors)

7

What does the nervous system contain?

- brain & spinal cord
- cranial nerves (12 pairs)
- spinal nerves (31 pairs)
- ganglia (cell bodies)
- Enteric plexuses of the gut (ANS)

8

What is the SNS and what does it do?

- Controls voluntary movement (skeletal muscle)
- Consists of sensory neurones from head, body wall, limbs and special senses to the CNS > Motor neurones > skeletal muscle

9

What is the 3 stages of a reflex arc?

Sensory input > integration > motor output

10

What is the ANS and what does it do?

- controls involuntary processes (digestion, BP regulation) and smooth muscle, heart, glands

- consists of sensory receptors in visceral organs that link to CNS

- motor neurones from CNS to smooth and cardiac muscle and glands

11

What are sense organs and what do they detect?

- detect changes inside and outside the body
- eyes (light receptors), ears(sound, position receptors), nose (chemical receptors), skin (touch, pressure, pain, temp receptors), tongue/mouth (chemical receptors)
- detect light, sound, smell, taste, temperature, pain

12

Explain a reflex arc in the form of messages

1. Info detected by sense organs sent to CNS along sensory neurones in form of AP.
2. CNS respond to message by sending a message back telling the body what to do.
3. Message from CNS travels along a motor neurone in form of AP to a muscle/gland.

Muscle=contract
Gland=secrete substance