Synaptic fatigue is due to

The neurotransmitter which communicates between two neurons or between a neuron and a muscle is

Unidirectional transmission of a nerve impulse through a nerve fibre is due to the fact that

Parkinson's disease (characterized by tremors and progressive rigidity of limbs) is caused by degeneration of brain neurons that are involved in movement and control. Identify the neurotransmitter responsible for this.

Branched ends of nerve cells are called telodendria,which establish functional contact with other nerve cells. This connection is called:

Which of the following is broken down by the enzyme $Acetylcholinesterase$?