Chronic diseases are select one: a. contagious. b. the leading cause of death and disability in the united states. c. inclusive of aids and lyme disease. d. not preventable.

d not preventable because some diseases can not be cured and you wil have to continue to get treatment for it so i would say that it is d

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.