Week 10 (Nervous System.2)

Question 1

Describe the process of Neurotransmission

Answer 1

1.Calcium-gated channels open

2.Calcium ions enter the synaptic terminal and cause the release of a chemical called a neurotransmitter

3.The neurotransmitter diffuses across the synapse to the next cell

4.This stimulates sodium channels to open in the postsynaptic membrane

Question 1

What are the different types of Neurotransmitters?

Answer 1

*Acetylcholine
*Adrenaline
*Dopamine
*Serotonin

Question 2

What is the Depolarisation of a Neuron?

Answer 2

*Sodium channel opens on neuron cell membrane
*Sodium ions flow into cell by passive diffusion
*Increase in sodium leads to a positive electrical charge

*Sodium channels close
*K+ channels open
*K+ diffuses out of the cell
*Resting state restored
*As repolarization ends, sodium-potassium pump moves sodium and potassium ions back to their original sides (refractory period)

Question 3

What is the Repolarisation of a Neuron?

Answer 3

re-charging

Question 4

List/ Label the 12 Crainal Nerves…

Answer 4

TRY YOUR BEST!!!