During exercise, (B) __________ muscles in the walls of the veins contract and cause the vein walls to stiffen so more blood flows to the heart and lungs.

Similar Questions
  1. blood flow is maintained in the veins by?A.blood pressure B.valves in the veins which prevent back-flow C.muscular pumping
    1. answers icon 1 answer
  2. Match the best description to OverloadA. Muscles need time to rest and recover after a workout. B. Exercise the muscles you want
    1. answers icon 1 answer
    1. answers icon 1 answer
  3. What would happen if you didn’t have any acetylcholinesterase in your body?(1 point) Responses Your muscles couldn’t get the
    1. answers icon 1 answer
more similar questions