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: If you eat healthier your body won’t feel as tired. You’ll be putting healthier food in your body which may help your skin
Explanation:
Reviving ache as, pains, cramps, and making you feel better when don't or sick.
The last one. Micronutrients. Brainliest please!
C. Sperm and egg cells are made during meiosis
