The air sacs in the lungs that aide in gas exchange are called:

a)capillaries
b)veins
c)arteries
d)esophogus

Patricia is told by her physician that her body and brain chemistry have physically adapted to the drug and that she has become dependent on the tranquilizers prescribed for her by another doctor.

Would really appreciate it, i have an idea but not completely sure

What feature of cell theory is best demonstrated in the image