Explain why chemical stimulation is sometimes preferred over ...

[jon_i]

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]

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.

[jon_i]

Thank you

[lkoler]

No problem