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.'
<span>The question says, then crust,mantle and core are all parts of. ....... The correct option is D. They geosphere is there solid part of their earth and it includes the rocks, minerals, abiotic part of their soil, skeleton of dead animals, etc. The geosphere is formed by the process of rock cycle, which involves metamorphism,melting and solidification, weathering, erosion, etc.</span>
Answer:
Those who have a family history of alcoholism have a higher risk of developing a drinking problem. Studies show that alcoholism is approximately 50 percent attributable to genetics.
Explanation:
i hope this helps you
Best activity for Wendy for her heart heath and for the preparation for her first 5km is the mix of running and walking. A run-walk program is an effective training method that can help you increase your fitness faster. So, for someone yo had not been running this training method is the first thing to do. <span>The run-walk method will allow Wendy to exercise for a longer period of time each session. This will increase her aerobic capabilities more rapidly, she will burn more calories, and reduce her</span><span> </span>risk of injury.
