Question

When a muscle is unable to respond to stimuli temporarily, it is in which of the following periods? When a muscle is unable to respond to stimuli temporarily, it is in which of the following periods? latent period fatigue period relaxation period refractory period

Answer 1

The refractory period is the period when a muscle is temporarily unable to respond to stimuli.

Step-by-step explanation:

The period when a muscle is unable to respond to stimuli temporarily is called the refractory period. During this period, the membrane of the muscle cell cannot generate another action potential, and it allows voltage-sensitive ion channels to return to their resting configurations. This period typically lasts for a short duration before the muscle regains its ability to respond to stimuli.

Answer 2

Refractory period

Step-by-step explanation:

When two stimuli are applied one after another intermediately, muscles contract in response to the first stimuli. Once a muscle fiber receives stimulation to contract, it loses its excitability temporarily and cannot respond for a time. This period when the muscle loses its excitability is called refractory period.

Different types of muscle fibers have different duration of refractory period. The refractory period of skeletal muscle is shorter than that of cardiac muscle. During an absolute refractory period, the activation gates of voltage-gated Na+ channels are open and the channels are inactivating while the voltage-gated K+ channels are open.