Which ONE of the following bands does not change in length when a skeletal muscl
ID: 227578 • Letter: W
Question
Which ONE of the following bands does not change in length when a skeletal muscle fibre contracts isotonically? Select one: M Which ONE of the following statements regarding the sliding filament theory of muscle contraction is CORRECT? Select one: Every cycle two molecules of Al P are used by each myosin head. The cross-bridges have an unlimited range of movement. Every cycle four molecules of ATP are used by each myosin head. Sliding is caused by the cross-bridges on the myosin molecule interacting with specific sites on the actin molecule. The cross-bridges are activated once during a contraction. When skeletal muscle shortens, the l band contracts while the A band does not change in length. The explanation for this is Select one: The thick myosin filament moves over the thin actin filament. The titin molecule pulls the actin filaments towards the Z-line. The actin and myosin filaments are both moving. Dystrophin pulls the myosin filament towards the Z-line. The actin filament moves along the fixed myosin filament.Explanation / Answer
Question
Answer
Explanation
Which one of the following bands does not change in length when a skeletal muscle fiber contracts isotonically?
A band
The length of the A band will not change in length during the isotonic contraction of skeletal muscle fiber.
Which ONE of the following statements regarding the sliding filament theory of muscle contraction is CORRECT
Sliding is caused by cross bridges on the myosin molecule interacting with specific sites on the actin molecule
It is the myosin molecule which causes the sliding by interacting with actin’s specific sites
When skeletal muscle shortens, the I band contracts while the A band does not change in length. The explanation for this is
The actin filament moves along the fixed myosin filament.
A will not change as the actin filament is seen moving along the fixed myosin filament
Which ONE of the following statements regarding the sliding filament theory of muscle contraction is FALSE?
During sliding the A band shortens
The length of the A band will not change. It is the I-bands and the H-zone which will shorten
Question
Answer
Explanation
Which one of the following bands does not change in length when a skeletal muscle fiber contracts isotonically?
A band
The length of the A band will not change in length during the isotonic contraction of skeletal muscle fiber.
Which ONE of the following statements regarding the sliding filament theory of muscle contraction is CORRECT
Sliding is caused by cross bridges on the myosin molecule interacting with specific sites on the actin molecule
It is the myosin molecule which causes the sliding by interacting with actin’s specific sites
When skeletal muscle shortens, the I band contracts while the A band does not change in length. The explanation for this is
The actin filament moves along the fixed myosin filament.
A will not change as the actin filament is seen moving along the fixed myosin filament
Which ONE of the following statements regarding the sliding filament theory of muscle contraction is FALSE?
During sliding the A band shortens
The length of the A band will not change. It is the I-bands and the H-zone which will shorten
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