NERVOUS
NEUROGLIA
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
protects
|
|
|
insulates
|
|
|
increases speed of transmission
|
|
|
all of the above
|
Detailed explanation-1: -Myelin is an insulating layer, or sheath that forms around nerves, including those in the brain and spinal cord. It is made up of protein and fatty substances. This myelin sheath allows electrical impulses to transmit quickly and efficiently along the nerve cells. If myelin is damaged, these impulses slow down.
Detailed explanation-2: -An axon is insulated by a myelin sheath throughout its length to increase the velocity of these electrical signals allowing signals to propagate quickly. Axons which are covered by a myelin sheath, a multilayer of proteins and lipids, are said to be myelinated.
Detailed explanation-3: -Which of the following is NOT a function of the myelin sheath? To recapture and recycle released neurotransmitters. Recapturing and recycling released neurotransmitters is a function of astrocytes, not the myelin sheath.