The best way to get accurate information on the risks of a new health-enhancing activity is to consult someone who is informed and experienced in that activity and it is a good idea to consult your doctor about the activity before participating in it to make sure you are physically capable of doing so.
Answer:
true
Explanation:
About 90 percent of nonmelanoma skin cancers are associated with exposure to ultraviolet radiation from the sun.
ANSWER A.Travis’s heart pumps more quickly to allow oxygen to be removed from the air and transported to the tissue.
Answer: Refractory period of the cardiac action potential
Explanation:
Unlike the skeletal muscle which can be reactivated before it reaches a contraction, cardiac muscle must wait before it is almost completely relaxed to be activated again (because of its long refractory period), so one cannot make an increase in strength of contraction with a high frequency of stimulations.
