The joint between the axon of a neuron and the dendrite of the next is called:

Alzheimer's disease in humans is associated with the deficiency of

Which one of the following does not act as a neurotransmitter?

True about electrical synapses:
$(I)$. Pre and postsynaptic neurons are in very close proximity.
$(II)$. Pre and postsynaptic neurons are separated by a synaptic cleft.
$(III)$. Impulse transmission is very fast.
$(IV)$. Electrical synapses are common in our system.
Select the correct option.

The space between two adjoining neurons where the chemical transmitter is released is known as:

Parkinson's disease (characterized by tremors and progressive rigidity of limbs) is caused by the degeneration of brain neurons that are involved in movement control and make use of the neurotransmitter: