Alternating between running and walking a. will slow down the chances of a person's getting into shape. b. will guarantee that you don't suffer an injury during exercise. c. is the quickest way to lose 10 pounds. d. can lessen the damaging effects that running has on the body.

The lower respiratory system includes the a. lungs. b. esophogus. c. larynx. d. pharynx

Which two levels of the spine that can undergo flexion and extension?

What is difference between an epidemic and a pandemic? a) an epidemic is a disease; a pandemic is a treatment.b) an epidemic is restricted to a local region; a pandemic is global.c) an epidemic has low mortality; a pandemic has higher mortality.d) an epidemic is caused by a bacterial infection; a pandemic is caused by a viral infection.