Question

question 1
the support cells protecting neurons are called ______ cells.
a glial
b myelin
c axial
d neuroblasts
e axons

question 2
some diseases result in removal of the myelin sheath surrounding neurons. this would result in ______.
a an increase in action potentials
b slower action potentials
c faster action potentials
d inhibition of action potentials

Explanation:

Question 1

In neuroscience (a subfield of Biology, which is under Natural Science), glial cells (also called neuroglia) are the support cells that protect, nourish, and insulate neurons. Myelin is a substance that insulates axons, not a cell. Axial refers to a plane or direction, neuroblasts are neural precursor cells, and axons are parts of neurons, not support cells. So the correct answer is A.

The myelin sheath around neurons (formed by glial cells) functions to speed up the transmission of action potentials through saltatory conduction (jumping between nodes of Ranvier). If the myelin sheath is removed, the action potential can't jump and has to travel along the entire axon membrane, which slows down its transmission. So the removal of myelin would result in slower action potentials.

Answer:

A. glial

Question 2