ANATOMY
LIMB VASCULATURE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
true
|
|
|
false
|
|
|
Either A or B
|
|
|
None of the above
|
Detailed explanation-1: -An increase in the hydrogen ion concentration in contracting skeletal muscle can impair performance by hydrogen ions competing with calcium ions for binding sites on troponin.
Detailed explanation-2: -Calcium binds to troponin, altering its shape. Calcium binding to troponin causes tropomyosin to move away from the active sites on actin. What role does tropomyosin play in the cross bridge cycle? The displacement of tropomyosin exposes the active sites of actin, allowing cross bridges to form.
Detailed explanation-3: -Troponin T binds the complex to tropomyosin; troponin C binds calcium; and troponin I regulates the interaction of the complex with tropomyosin, binding to troponin C during systole and to actin during diastole.