Answer:
the form of a sperm cell helps it to travel apon ejaculation and impregnation of a female.
Yes, I think that by playing sports it will take my mind off of the whole pandemic and it will help me focus on my school work so I can continue to play the sport i choice to play
Stimulants are often called "uppers".
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.
