Which of these is not a cognitive symptom of chronic stress?

The answer for the above question is that People may gain or lose weight. Chronic stress is stress that is experienced for a very long time. The cognitive signs of stress include; forgetfulness, preoccupation, lack of concentration, diminished productivity, lack of attention to detail, reduced activity among other symptoms. 

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.