The axons of peripheral system neurons are surrounded by cells called ______ They wrap the axon in many layers of a whitish, non-conductive protein called ______. Without this coating, the electrical impulse that propagates the nerve signal can be lost to the surrounding tissue.

Question

BlackTom AI · Accepted Answer

The question asks about the cells that surround peripheral axons and the substance they form. 
Option 1: 'myelin; glia' reverses the two terms. It is true that myelin is the coating, but the cells that form it in the peripheral nervous system are specifically Schwann cells, not just generic glia. So this pairing is incorrect.
Option 2: 'glia; myelin' uses 'glia' as the coating, which is inaccurate because the coating is called myelin, and the cells in the PNS that produce it are specialized glial cells (Schwann cells). The option confuses the cell type with the substance produced.
Option 3: 'Schwann cells; glia' correctly identifies Schwann cells as the cell type but then says the coating is 'glia,' which is itself incorrect—the coating is myelin, not glial tissue.
Option 4: 'Schwann cells; myelin' correctly pairs the PNS-specific myelinating cells (Schwann cells) with the substance they produce (myelin). This matches the description of wrapping the axon in multiple layers of a whitish, non-conductive protein forming the myelin sheath, which facilitates rapid nerve impulse conduction. 
In summary, the correct pairing reflects both the cellular origin in the peripheral nervous system and the insulating substance created by those cells, whereas the other options mix up either the cell type or the substance.

APBIO141-031 with labs Unit 4 Test

The axons of peripheral system neurons are surrounded by cells called They wrap the axon in many layers of a whitish, non-conductive protein called . Without this coating, the electrical impulse that propagates the nerve signal can be lost to the surrounding tissue.

View Explanation

Log in for full answers

Similar Questions

Dr. Dre is investigating reflexes in two different animals: a crab and a fish. Action potentials are found to pass more rapidly along the fish's neurons. What is a likely explanation?

True or False: In brain development, myelination starts occurring at the end of infancy and continues throughout childhood but then becomes complete at the end of adolescence.

Question at position 32 Schwann cells primarily:Wrap around axons to form myelin sheathsCover axons without gaps for continuous insulationInsulate the central nervous system axonsRegulate the extracellular environment of neuron cell bodies

Schwann's cells form myelin sheaths around axons in the central nervous system.

What allows the action potential to pass quickly and efficiently down the axon?

What involves an increase in the speed and efficiency with which information travels through the nervous system during brain development in children between the ages of 3 and 5.

What is myelination?

Which of the following is not true about myelination?

More Practical Tools for Students Powered by AI Study Helper

Homework AI Solver

Stylized AI Paper Writer

Plagiarism Checker Assistant

Citation AI Academic Writing Tool

In-Class Translation Assistant

AI Note Generator

AI Quiz Answers

Past Exam Questions from University Test Bank

Smart Practice Assistant

Adaptive Practice

Making Your Study Simpler