Author Question: Explain why chemical stimulation is sometimes preferred over electrical stimulation. What will be ... (Read 94 times)

jon_i

  • Hero Member
  • *****
  • Posts: 549
Explain why chemical stimulation is sometimes preferred over electrical stimulation.
 
  What will be an ideal response?

Question 2

Explain how autoradiography can be used to measure the activity of brain cells.
 
  What will be an ideal response?



lkoler

  • Sr. Member
  • ****
  • Posts: 358
Answer to Question 1

Answer: Chemical stimulation can be used to excite cell bodies rather than both cell bodies and axons of passage.

Answer to Question 2

Answer: Brain cells require glucose as fuel for activity. 2-DG , like glucose, is taken up into neurons, but cannot be used for energy. If a radioactive version of 2-DG is injected into an animal, radioactive 2-DG molecules will accumulate in brain as a function of the relative activity of those cells. Autoradiography will reveal the presence of radioactive molecules in the brain, with a more intense signal in regions that were more active, and a less intense signal in less active regions.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question


 

Did you know?

After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.

Did you know?

In 1885, the Lloyd Manufacturing Company of Albany, New York, promoted and sold "Cocaine Toothache Drops" at 15 cents per bottle! In 1914, the Harrison Narcotic Act brought the sale and distribution of this drug under federal control.

Did you know?

There are more nerve cells in one human brain than there are stars in the Milky Way.

Did you know?

The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

Did you know?

Drug abusers experience the following scenario: The pleasure given by their drug (or drugs) of choice is so strong that it is difficult to eradicate even after years of staying away from the substances involved. Certain triggers may cause a drug abuser to relapse. Research shows that long-term drug abuse results in significant changes in brain function that persist long after an individual stops using drugs. It is most important to realize that the same is true of not just illegal substances but alcohol and tobacco as well.

For a complete list of videos, visit our video library