Between 6-8 months is generally when most toddlers sit up on their own
Answer:
Your pineal gland. Its responsible for producing melatonin, a hormone that helps regulate sleep and wakefulness.
Answer:
to get the results u are looking for towards the program u chose and to look better than before
Explanation:
The first test is the heart
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.
