Final answer:
The statement about all peripheral nerves being myelinated is false, as peripheral nerves can be either myelinated or unmyelinated, with Schwann cells and oligodendrocytes responsible for myelination in the PNS and CNS, respectively. The myelin sheath facilitates faster nerve impulse transmission.
Step-by-step explanation:
The statement 'All peripheral nerves are myelinated' is False. Peripheral nerves consist of both myelinated and unmyelinated axons. Myelinated axons are covered by a fatty layer called the myelin sheath, which acts as an insulator and speeds up the transmission of nerve impulses. Conversely, unmyelinated axons lack this sheath and consequently, nerve impulses travel more slowly along them.
In Figure 12.13 The Process of Myelination, it is shown that myelinating glia such as Schwann cells and oligodendrocytes play a key role in forming the myelin sheath around axons in the peripheral nervous system (PNS) and central nervous system (CNS), respectively.
Moreover, sensory transduction involves the peripheral nervous system and neurons, like those involved in taste, are part of it. The spinal cord is composed of both white and gray matter, with axons stretching over considerable lengths, sometimes over a meter in adult humans. Language difficulties arising from a stroke typically indicate damage to the dominant hemisphere of the brain, usually the left hemisphere for right-handed individuals.