25 !
which blood vessels have thin, muscular walls and valves to prevent the backflow of blood?

a. veins
b. arterioles
c. capillaries
d. arteries

What is a self-improvement strategy for a parent with a busy schedule? a. spend more time watching exercise shows on tv. b. start exercising when the kids are grown. c. use a calendar to plan daily exercise. d. write in a journal about the importance of exercise.

Your friend goes on an all-mango diet for one month to investigate whether she can make her skin turn orange. which of the following will be most deficient in this diet? a. minerals b. dietary fiber c. amino acids d. vitamins

You are traveling down the road and the hopd flies up- a. look out of the gap between hood and cowling b. look out the left window c. stop the car d. turn on your four-way flashers e. use stop signal given with arm 2. you are driving down a dark, country road and the headlights suddenly go out- pull off the side of the road and stop flash your break lights activate your four way flasher have scotty beam you up turn your parking lights on 3. you turn on a crowded street and the accelerator pedal sticks- turn ignition off shift to neutral apply the brakes reach down and pull pedal by hand use the of toe of your food to pull pedal up