You want to artificially increase function of the dopamine system in one or more regions of the rat brain. Which of the following methods would be LEAST effective at accomplishing this in rats? Select one:

a.
Optogenetics

b.
A dopamine agonist delivered via intraperitoneal injection

c.
6-hydroxydopamine injection directly into the brain

d.
Putting L-DOPA in the rats' diet

e.
A dopamine agonist delivered via intravenous injection

Acceleration is a direct result of a.) balanced forces b.) unbalanced forces c.) gravity d.) velocity hurry!

Which was most likely an effect on society that resulted from improvements in blood handling during world war i and world war ii?

The graph shows the amount of global warming happening in different ecosystems. which populations of organisms will likely decline the most as a result of climate change, and why? a. coral reefs because of the loss of the symbiotic algae living within their bodies b. penguin populations because the fish they eat will move into warmer waters c. mountain-dwelling birds because rising sea levels will relocate their food sources d. large cats in the rainforest because of decreased habitat loss for their prey