MEDICAL PHYSIOLOGY

PHYSIOLOGY

NEUROTRANSMISSION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
When depolarisation reaches the telodendria of the axon, ____ ; this allows the release of ____ into the ____
A
Sodium channels open; neurotransmitters; synaptic gap
B
Potassium channels open; neurotransmitters; synaptic gap
C
Calcium channels open; dopamine; cell body
D
Calcium channels open; neurotransmitters; synaptic gap
Explanation: 

Detailed explanation-1: -When the action potential reaches the terminal, it activates voltage-dependent calcium channels, allowing calcium ions to flow into theterminal. In the resting state, neurotransmitters are stored in vesicles at the pre-synaptic terminal.

Detailed explanation-2: -The calcium entry causes synaptic vesicles to fuse with the membrane and release neurotransmitter molecules into the synaptic cleft.

There is 1 question to complete.