D and A I believe not sure though
Adding the heights of both parents and subtracting five inches, then dividing by two. The predictions are affected by environmental factors such as nutrition, which can play an important role in determining height.
C. Respond with body language and tone of voice that is threatening and serious.
Answer:
Option). about 20 percent of the calcium ion required for contraction comes from outside the cell.
Explanation:
Calcium ions play an important role in cardiac muscle physiology. Calcium ions influx is responsible for plateau phase after depolarization. Calcium ions also play role in muscle contraction with the help of troponin (regulatory protein).
For contraction, about 20 percent of calcium ions are supplied from outside of the cell, while rest of the calcium ions are released from SR (sarcoplasmic reticulum).
Thus, the correct answer is 'forth option.'
Answer:
notify the students before hand.
Explanation:
