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.
Answer:
not giving in to hardships
Explanation:
Answer:
Why are you shouting at them?
No, I can't stay here, I want to go at once.
Many, many years ago there lived a hermit in a dense forest.
Congratulations! said the Captain.
An example of an aerobic exercise:
d)
A and C
<span>Humans have an endoskeleton, whereas insects have exoskeletons.</span>