NEET PG DENTAL EXAM

Detailed explanation-1: -Although testosterone is produced in the testes (male gonads), it is not a neurotransmitter.

Detailed explanation-2: -For example, vasopressin and oxytocin, two peptide hormones that are released into the circulation from the posterior pituitary, also function as neurotransmitters at a number of central synapses.

Detailed explanation-3: -Neurotransmitters are endogenous chemicals such as dopamine, glutamate, endorphin, and serotonin that send signals across a chemical synapse from one nerve cell to the other. The organ system of hormones is the endocrine system while that of neurotransmitters is the nervous system.