Answer to Question 1
Ans:
A
Feedback:
Dopamine levels are thought to be altered in addiction and possibly contribute to addiction. Acetylcholine, serotonin, and norepinephrine are not noted to play a central role in the neurophysiology of addiction.
Answer to Question 2
Ans:
A
Feedback:
The threat to vision that is posed by poorly controlled blood sugar levels is compounded by high blood pressure and/or cholesterol levels. Pregnant women with diabetes need additional care to monitor their sight, but they will not necessarily lose it. The damage caused by diabetes does not occur on the lens, and restoration of lost visual acuity is not normally possible.