Podcast
Questions and Answers
Which ion binds to troponin, displacing tropomyosin and exposing the myosin binding sites on actin?
Which ion binds to troponin, displacing tropomyosin and exposing the myosin binding sites on actin?
What regulatory protein blocks the crossbridge binding sites on actin when a muscle is relaxed?
What regulatory protein blocks the crossbridge binding sites on actin when a muscle is relaxed?
Where are calcium ions stored in a muscle fiber?
Where are calcium ions stored in a muscle fiber?
What triggers the release of calcium ions in response to signals from the nervous system to contract?
What triggers the release of calcium ions in response to signals from the nervous system to contract?
Signup and view all the answers
What happens to the sarcomeres in myofibrils during muscle contraction?
What happens to the sarcomeres in myofibrils during muscle contraction?
Signup and view all the answers
