This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Explain how the presence of myelin on an axon speeds up conduction velocity. What will be an ... (Read 52 times)

Mr3Hunna

  • Hero Member
  • *****
  • Posts: 536
on: Jun 22, 2018
Explain how the presence of myelin on an axon speeds up conduction velocity.
 
  What will be an ideal response?

Question 2

Compare and contrast the general functions of the three glial cell types in the brain.
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

sylvia

  • Sr. Member
  • ****
  • Posts: 331
Reply #1 on: Jun 22, 2018
Answer to Question 1

Answer: In saltatory conduction, the axon is wrapped in a fatty membrane called myelin, which
insulates the membrane from the extracellular fluid. In this case, the action potential does not have to depolarize every segment of membrane, only those at the widely separated nodes of Ranvier (gaps between the myelin segments).

Answer to Question 2

Answer: Oligodendrocytes form CNS myelin, which speeds up neural conduction speed. Astroglia provide support and nutrition for neurons. Microglia are involved in brain immune
function.


Mr3Hunna

  • Member
  • Posts: 536
Reply 2 on: Jun 22, 2018
Excellent

vickyvicksss

  • Member
  • Posts: 351
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

To maintain good kidney function, you should drink at least 3 quarts of water daily. Water dilutes urine and helps prevent concentrations of salts and minerals that can lead to kidney stone formation. Chronic dehydration is a major contributor to the development of kidney stones.

Did you know?

People with alcoholism are at a much greater risk of malnutrition than are other people and usually exhibit low levels of most vitamins (especially folic acid). This is because alcohol often takes the place of 50% of their daily intake of calories, with little nutritional value contained in it.

Did you know?

The average human gut is home to perhaps 500 to 1,000 different species of bacteria.

Did you know?

Many supplement containers do not even contain what their labels say. There are many documented reports of products containing much less, or more, that what is listed on their labels. They may also contain undisclosed prescription drugs and even contaminants.

Did you know?

Disorders that may affect pharmacodynamics include genetic mutations, malnutrition, thyrotoxicosis, myasthenia gravis, Parkinson's disease, and certain forms of insulin-resistant diabetes mellitus.

Conduction System of the Heart Conduction System of the Heart
Cervical cancer (a) Top view of the uterus showing the presence of a tumor in the wall of the cervix Cervical cancer (a) Top view of the uterus showing the presence of a tumor in the wall of the cervix
Conduction system of the heart. Conduction system of the heart.
A myelinated axon from the spinal cord A myelinated axon from the spinal cord
Normal nerve conduction of Sodium ion Normal nerve conduction of Sodium ion
A particle (q = -4.0 mC, m = 5.0 mg) moves in a uniform magnetic field with a velocity having a ... A particle (q = -4.0 mC, m = 5.0 mg) moves in a uniform magnetic field with a velocity having a ...
Video: Gas exchange - partial pressure, locations, external and internal respiration

For a complete list of videos, visit our video library