Week 2

Question 1

Glial cells

Answer 1

Surround the CNS neurons and hold them in place
Controls neurons supply nutrients and oxygen
Indulate one neurons from another
Destroy and removedeadnerons
Cannot conduct and cannot divide

Question 2

Steps of neuron action potential

Answer 2

1. Slow influx of sodium to -60
2. Voltage gated sodium channels open
3. Transmembrane potential rises to +30
4. At peak, sodiummchannelsmclose and potassium opens
5. Hyperpolarised as sodium continues to leave, then sodium potassium pump restoresback to resting membranepotentisl

Question 3

what does the sodium potassium pump require

Answer 3

O2
Otherwise cell cannot repolarize
Why hypotension and hypoxia have seizures

Question 4

Myelin sheath of peripheral nervous system

Answer 4

Schwann cells

Question 5

Myelin sheath of cns

Answer 5

Oligodendrocytes

Question 6

Ache

Answer 6

Acetylcholinesterase
Enzyme to breakdown ach

Question 7

Neurotransmitters of cns

Answer 7

Ach
NoradrenLin
Substance p
Afrenalin
Dopamine
Serotonin
Histamine
Opioid

Question 8

Red Light Green Light

Answer 8

GABA= inhibitory
Glutamate = excitary