The membrane potential is negative and all the potassium channels are closed due to the repolarization of potassium. The absolute refractory period occurs during repolarization and the muscle fibers cannot respond to a stimulus. The cell can regenerate anther action potential, but only id it is depolarized to a value more positive than the normal threshold. After the action potential is generated at the axon hillock it is then propagated down the axon. The other step is the action potential travels down the T-tubules. Then the action potential triggers the terminal cisternae to release calcium ions into the sarcoplasm. In sliding filament mechanism of contraction the relax state is when ATP binds to the myosin head and is cleaved into
The membrane potential is negative and all the potassium channels are closed due to the repolarization of potassium. The absolute refractory period occurs during repolarization and the muscle fibers cannot respond to a stimulus. The cell can regenerate anther action potential, but only id it is depolarized to a value more positive than the normal threshold. After the action potential is generated at the axon hillock it is then propagated down the axon. The other step is the action potential travels down the T-tubules. Then the action potential triggers the terminal cisternae to release calcium ions into the sarcoplasm. In sliding filament mechanism of contraction the relax state is when ATP binds to the myosin head and is cleaved into