What does stage 1 represent? a. a muscle that is fully contracted b. a muscle that is fully at rest c. a muscle that is rotating

The correct would be option b.

It can be explained with the help of the H zone.

H zone is the region of the muscle which consists of only the thick filament, that is, myosin.

In a relaxed state, the thickness of the H zone is more as compared to the contracted state.

In the contracted state, the myosin pulled the actin fibers towards the M line due to which thickness of H zone decreases.

lunar landing mission. apollo 11 was the first manned mission to land on the moon. the first steps by humans on another planetary body were taken by neil armstrong and buzz aldrin on july 20, 1969. the astronauts also returned to earth the first samples from another planetary body.

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