Exam 21: Contractile Mechanisms in Skeletal Muscle

The thick filament is 1.6 :m long and the thin filament is 1.0 :m. At a sarcomere length of 2.2 :m, what fraction of the part of the thick filament containing m yosin heads is covered by a thin filament?

The “turnover number” refers to the

The sarcomere is defined as

The velocity of muscle contraction at maximum recruitment depends on

The structures thought to be involved in the lateral transmission of force are the

Heterogeneity of muscle speed in different muscle fibers depends in part on the

Isometric active force developed by skeletal muscle at long lengths (greater than the rest length)

The thin filament contains all of the following proteins EXCEPT

The A band contains all of the following EXCEPT

The plateau at the top of the length -tension curve is due to

The thick filament is 1.6 :m long and the thin filam ent is 1.0 :m. At a sarcomere length of 2.2 :m, how wide is the H band?

During a concentric contraction of muscle

The protein of the thick filam ent that extends to the Z line is

Force developed by muscle

Myofibrils are

The I band does not contain

“Striations” are

The thick filament is 1.6 :m long and the thin filament is 1.0 :m. At a sarcomere length of 2.2 :m, how much of the thin filament is covered by the thick filament?

Proteins involved in the lateral transmisson of muscle force to the outside of the m uscle fiber include

ATP hydrolysis associated with force development is carried out by