MEDICAL PHYSIOLOGY

PHYSIOLOGY

SYNAPTIC PHYSIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The ____ phase is the time between the application of a stimulus and the beginning of a contraction.
A
lag/latent
B
relaxation
C
contraction
D
tetanus
E
refractory
Explanation: 

Detailed explanation-1: -The latent period is the time lag between the application or reception of the stimulus and the onset of contraction.

Detailed explanation-2: -The period between action potential initiation and the beginning of contraction is called the latent period; excitation-contraction coupling occurs within the latent period.

Detailed explanation-3: -The latent period is a short delay (1-2 msec) from the time when the action potential reaches the muscle until tension can be observed in the muscle.

Detailed explanation-4: -A single muscle twitch has a latent period, a contraction phase when tension increases, and a relaxation phase when tension decreases. During the latent period, the action potential is being propagated along the sarcolemma.

Detailed explanation-5: -Depolarisation and calcium ion release. Actin and myosin cross-bridge formation. Sliding mechanism of actin and myosin filaments. Sarcomere shortening (muscle contraction)

There is 1 question to complete.