When a muscle contracts, what happens to the H zones? What is a rigor mortis and why does it occur?
Answer of 1st Question:
H-zone is contained by thick filament only. It appears as a lighter band in the middle of the dark A band at the center of a sarcomere.
According to sliding filament model of muscle contraction: When muscles contract then Z-lines come close each other, I-band shortens and
Answer of 2nd Question:
The stiffening of body after death is termed as rigor mortis.
ATP is needed to break the link between actin and myosin bridges that are formed as a result of contraction. But the amount of
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