Which function best describes peripheral nerve tissue?

• A. Transmits nerve impulses along the length of the neuron
• B. Synthesizes hormones
• C. Stores calcium
• D. Provides immune defense

Answer: (A)

The main function of peripheral nerve tissue is to transmit nerve impulses along the length of the neuron. This means generating and propagating action potentials along the axon so sensory information can reach the central nervous system and motor commands can reach muscles. In the peripheral nervous system, myelin produced by Schwann cells speeds up this transmission, with signals jumping between nodes of Ranvier for rapid communication.

The other options don’t capture what peripheral nerve tissue primarily does. Hormone synthesis is a hallmark of endocrine glands or specialized neurosecretory cells, not the main job of peripheral nerves. Storing calcium is a general cellular function related to signaling in many cell types, not a defining role of peripheral nerves. Providing immune defense is the domain of the immune system, though nerves can influence immune responses, their primary function isn’t defense.