Question

Predict the effect of hypothermia and dehydration (low blood flow) on release of neurotransmitter (ACh) on the muscle fiber?

(Think about the relationship of aerobic mechanism, ATP, mitochondria, exocytosis, active and transport)

a. more ACh releases

b. less ACh release

c. same amount of ACh release

d. none of the choices

Acetylcholine is released from a neuron / Through exocytosis when a vesicle fuses with the membrane. true and false

Symport active transporters move two substances across the membrane in the same direction. True and false

.The sodium-potassium pump moves/ sodium out of the cell and potassium into the cell. True and false

Answer 1

1) Answer : a. more ACh release

Because, the nerve conduction is highly affected due to hypothermia and therefore, acetylcholinesterase activity is reduced and acetylcholine level is increased.

2. Answer : True

Acetylcholine vesicles in presynaptic neuron is released when the vesicles fuses with the membrane.

3. Answer :False

Symport transports only one substance in the same direction.

4. Answer : False

Sodium moves into the cell whereas potassium move out of the cell because sodium concentration is high outside the cell whereas potassium concentration is high inside the cell.