PHYSIOLOGY
MUSCLE CONTRACTION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
Calcium inside the muscle cell binds to which filament, causing a shape change and revealing the active sites.
|
|
Actin
|
|
|
Myosin
|
|
|
Troponin
|
|
|
Tropomyosin
|
Explanation:
Detailed explanation-1: -Each heartbeat is triggered by a pulse of intracellular calcium ions which bind to troponin on the actin-containing thin filaments of heart muscle cells, initiating a change in filament structure that allows myosin to bind and generate force.
Detailed explanation-2: -1: Muscle contraction: Calcium remains in the sarcoplasmic reticulum until released by a stimulus. Calcium then binds to troponin, causing the troponin to change shape and remove the tropomyosin from the binding sites.
There is 1 question to complete.