What is released from the sarcoplasmic reticulum into the myofibril, causing tension development in a muscle?

Posted by: Pdfprep Category: CSCS Tags: , ,

What is released from the sarcoplasmic reticulum into the myofibril, causing tension development in a muscle?
A . Calcium ions that bind to troponin
B . Calcium ions that bind to tropomyosin
C . Sodium ions that bind to troponin
D . Sodium ions that bind to tropomyosin

Answer: A

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