<span>What structure contains special enzymes that muscle cells need to utilize oxygen?
Enzymes.
</span>
Answer:
your blood becomes more concentrated which makes you cardiovascular system work a whole lot faster
Explanation:
Answer: This is very good advice, and showed always know your surroundings. Also may I have the brainlest?
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.'
