The process of excitation is one of the major means by which matter absorbs pulses of electromagnetic energy (photons), such as light, and by which it is heated or ionized by the impact of charged particles, such as electrons and alpha particles.
What are the steps in excitation?
Terms in this set (6)
- Action potential spread along the sarcolemma to the T-tubules (transverse tubules)
- Calcium is released into the sarcoplasmic reticulum (S.R.)
- Calcium binds to actin and the blocking action of the tropomyosin is removed.
- Myosin heads attach to begin contraction.
What triggers excitation process?
Tutorial:
- The excitation process begins when the. ...
- Stimulation of the muscle fiber by the ACh neurotransmitter generates waves of. ...
- The action potentials enter the muscle fiber from the sarcolemma and cause calcium ions (= Ca2+) to be released from the sarcoplasmic reticulum.
