Biopsych

Question 1

What does peripheral nervous system PNS do

Answer 1

• sends messages to whole body from brain and relay neurones back to brain

Question 2

Wt r the 2 sections in PNS

Answer 2

• somatic system= transmits + receives message via senses

• autonomic system= separated into 2 further groups transmits and receives messages from organs

• sympathetic- increases activity
• parasympathetic- helps conserve body activity

Question 3

3 types of neurones

Answer 3

• sensory: peripheral nervous system carriers- long dendrites and short axons
• motor: signals from cns towards organs and muscles and glands connected to motor neurone
• relay- interneurones take on role of sensory motor neurones

Question 4

What’s a synapse

Answer 4

• junction where 2 receptors meet consists of presynatpic cleft post synaptic membrane

Question 5

Give stages of synaptic transmission 5stages

Answer 5

1• impulse arrives at end of presynaptic neurone

2• vesicles move towards+ fuse w presynaptic membrane releasing neurotransmitters into synaptic cledt

3• neyronstranitteds diffuse across synaptic cleft

4• neurotransmitters attach into receptors on post synaptic membrane

5• triggers impulse travels along post synaptic neurone