"Neurons" are the functional unit of the nervous system; it is the specialized cells transmitting nerve impulses
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Answer:
B) Nucleotides
Explanation:
The nucleotides sequence of DNA molecules determines the protein that will be produced. The mRNA molecules carry a copy of DNA to ribosome. the nucleotides consist of three parts- nitrogenous base, pentose sugar and a phospate group. There have more than six billion nucleotide pairs in a cell.
The sensory receptors refer to the portions of the nervous system, which sense variations in the external or internal surroundings. The sensory input can be in various forms, comprising taste, pressure, light, sound, pH of blood, or levels of hormones, which are transformed into a signal and are transmitted to the brain or spinal cord.
In the sensory centers of the brain, the barrage of information is integrated and a response is produced. The response, that is, a motor output refers to a signal conducted towards organs via motor neurons, which then transforms the signal into some kind of action, like changes in heart rate, movement, discharge of hormones, and others.
