In the human retina, messages go from receptors at the back of the eye to ____.
a. retina cells
b. bipolar cells
c. ganglion cells
d. spiny cells
Question 2
In some cases of Alzheimer's disease that run in families, the cause of the disease appears to involve which gene(s)?
a. a gene on the X chromosome
b. a gene on the Y chromosome
c. a series of genes on chromosome 4
d. genes on several different chromosomes