As fas as i remember 20% of whole cell is RBC
so the answer is 2×10^13 !!
Answer:
b, d, f, a, e, c
Explanation:
Ca+ binds to troponin -> Troponin removes tropomyosin from G actin -> Myosin binds to actin -> Myosin generates a power stroke -> the sarcomere shortens -> ATP recharges the myosin head
Passive transport is the movement of substances across the membrane without the expenditure of cellular energy.
Answer:
d. All of the Earth's systems interact with each other.
