Through the digestion system, water is mainly absorbed in the
a. gallbladder.
b. stomach.
c. small intestine.
d. large intestine.

Through the digestion system, water is mainly absorbed in the large intestine. This task is devoted to the system of gastrointestinal tract, in which you have to orientate. The only correct answer is large intestine that is the largest part of both the whole tract and digestive system and actually this is the point where water, as leftover, is absorbed.

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.