Answer:
I believe it is C
Explanation:
Cholesterol is a waxy, fat-like substance that’s found in all cells of the body. Your body needs some cholesterol to make hormones, vitamin D, and substances that help you digest foods. Your body makes all the cholesterol it needs. However, cholesterol also is found in some of the foods you eat. High levels of cholesterol in the blood can increase your risk of heart disease.
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.
I believe that this would be deforestation because the trees' roots keep the soil in place whereas if they were gone the soil would be loose.
A. A gradual but complete withdrawal from drugs
