Answer:
by the sarcoplasmic reticulum's calcium ion pumps
Explanation:
Rigor mortis or postmortem rigidity, is a state caused by chemical changes in the muscles that occur post mortem and cause the limbs of the corpse to stiffen.
This occurs because after death, there is no cellular respiration and consequently, no oxygen nor ATP (ATP is required for the muscle relaxation).
Calcium enters the cytosol after death because it is released due to the deterioration of the sarcoplasmic reticulum and due to the breakdown of the sarcolemma. Ca2+ ions activate the formation of actin-myosin cross-bridging necessary for the contraction. Muscles are unable to relax, because myosin heads continue to bind with the active sites of actin and there is no ATP to destabilize the myosin-actin bond.
I need answer choices to be able to give you an answer
Answer:
collaborate and debate
Explanation:
It helps them ensure the accuracy and quality of their answers
The population of brown rabbits increase because the predators can't see them due to colour of the soil.
<h3>Why the population of brown rabbits increased?</h3>
The population of brown fur rabbits have increased to 80% of the population as compared to white rabbits because brown rabbits can't be seen by the predators in the desert whereas the white rabbits are easily seen by the predators so the population of the brown rabbits increases.
So we can conclude that the population of brown rabbits increase because the predators can't see them due to colour of the soil.
Learn more about rabbits here: brainly.com/question/378897
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