Physio EX questions for final

Question 1

An action potential is propagated along an axon with what type of channels?

Answer 1

Voltage-gated

Question 2

What will affect axon conduction velocity?

Answer 2

The diameter of the axon and the amount of myelin

Question 3

The end of an axon where it contacts the target is called the?

Answer 3

Axon terminal

Question 4

Neurotransmitter is released into the synaptic cleft by what process?

Answer 4

Exocytosis

Question 5

Release of neurotransmitter from the axon terminal is triggered by an increased intracellular concentration of?

Answer 5

Calcium

Question 6

Neurotransmitter released into the synaptic cleft reaches the target cell by what process?

Answer 6

Diffusion

Question 7

What does the neurotransmitter do at the target cell?

Answer 7

Binds to receptor proteins, causes membrane channels to open or close, and causes a change in membrane potential

Question 8

With normal levels of extracellular calcium, when the action potential reaches the axon terminal it triggers?

Answer 8

Release of neurotransmitters by exocytosis