Afunctional advantage of having human testes in the scrotum rather than in the abdomen is

The human testes is perfectly placed in the scrotum rather than in the abdomen because the human testes can be very sensitive, It needs the right temperature for the sperm cells so it does not get ruined or disturb. Also, it would be very fast and easier for the sperm cells to be released from the testes.

Neurotransmitters are messengers responsible for communication between neurons. they are released from synaptic vesicles and are received by receptors.  the communication is referred to as neurotransmission. the following statement is true about neurotransmitters: a. they're stored in synaptic vesicles in the axon.