BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Nerves are the functional and structural units of the peripheral nervous system (PNS). They are composed of groups of individual specialized cells called neurons (or nerve cells), which transmit motor and sensory information back and forth between the PNS and central nervous system (CNS).

Detailed explanation-2: -Neurons. Neurons, or nerve cells, carry out the functions of the nervous system by conducting nerve impulses. They are highly specialized and amitotic.

Detailed explanation-3: -Each bundle of nerve fibers is called a fasciculus and is surrounded by a layer of connective tissue called the perineurium. Within the fasciculus, each individual nerve fiber, with its myelin and neurilemma, is surrounded by connective tissue called the endoneurium.

Detailed explanation-4: -An action potential, also called a nerve impulse, is an electrical charge that travels along the membrane of a neuron.

Detailed explanation-5: -Nerves are bundles of axons in the PNS. Nerves can be classified as sensory (afferent) for signals coming into the CNS from the PNS, or motor (efferent) for signals from the CNS to the PNS. Most nerves are mixed, and therefore carry both sensory and motor information.