1. Acetylcholine is
released from a motor nerve. This causes an entry of
calcium into the muscle cell.
2. Calcium activates
phosphorylase kinase - the first protein kinase
discovered by Fischer and Krebs.
3. Phosphorylase kinase
phosphorylates phosphorylase, which is activated
4. Glycogen is broken to
glucose. This is used to generate ATP
5. The muscle works and
requires energy in the form of ATP
6. The muscle contains
7. Contractile proteins in
the muscle are activated by calcium