Answer:
When calcium concentration increases during depolarization, it shifts the conformation of troponin and tropomyosin, and actin is able to associate with myosin. As calcium is taken up again by the sarcoplasmic reticulum the muscle cell relaxes.
yes, and???????, you need to put more detail, that would be considered a Statement not a question.
I'm not sure but it might be C
The same day an event occurs or a vulnerability is discovered.
In alimentary canal, food get digested by the action of many enzymes secreted by various glands including Liver, Pancreas and salivary glands....
