Smooth muscle actin and myosin

[ElphinStar]

Another physiology question I am not sure about...

 

True or False:

 

'In smooth muscle, the amount of actin and myosin is the same as in skeletal muscle but smooth muscle lacks troponin.'

 

I know smooth muscle has no troponin, but not sure whether is has more/less actin and myosin than skeletal muscle?

 

At a guess, I would say skeletal is likely to have more actin and myosin, but not sure.

 

Help will be appreciated

[galaxysponge]

There isn't necessarily more or less, but its arranged differently, more disorderly and many different structures and forms it takes on.

In smooth muscle the ratio of actin to myosin is 10:1 approximately. don't quote me on that . But yeah smooth muscle isn't as attractive because of it's messiness compared to the aligned fibers of skeletal muscle

Another physiology question I am not sure about...

 

True or False:

 

'In smooth muscle, the amount of actin and myosin is the same as in skeletal muscle but smooth muscle lacks troponin.'

 

I know smooth muscle has no troponin, but not sure whether is has more/less actin and myosin than skeletal muscle?

 

At a guess, I would say skeletal is likely to have more actin and myosin, but not sure.

 

Help will be appreciated