Each IgG has ________ binding sites for attachment to antigenic ...

[jenna1]

Each IgG has ________ binding sites for attachment to antigenic determinants.
 A) 1
  B) 2
  C) 4
  D) up to 8
  E) as many as a 1000

Question 2

How can an understanding of the neurotransmitters important in the function of the basal nuclei contribute to an understanding the underlying cause for Parkinson's disease?

[joanwhite]

Answer to Question 1

B

Answer to Question 2

Two distinct populations of neurons exist: one that stimulates neurons by releasing acetylcholine, and another that inhibits neurons through the release of gamma aminobutyric acid (GABA). Under normal conditions, the excitatory interneurons are kept inactive, and the tracts leaving the basal nuclei have an inhibitory effect on upper motor neurons. In Parkinson's disease, the excitatory neurons become more active, leading to problems with the voluntary control of movement. Treatment directed at increasing the supply of GABA is being investigated actively.

[jenna1]

Excellent

[aruss1303]

TYSM