Biology, 06.07.2020 23:01 quickestlearner5694
How is muscle contraction reversed? A. Calcium binds to calmodulin and is quickly degraded to relieve calcium’s inhibition of tropomyosin. B. Calcium is neutralized by an influx of negatively charged ions, which block calcium from binding to myosin. C. Calcium ion pumps in the sarcoplasmic reticulum reduce the cytosolic calcium levels and tropomyosin blocks the myosin-binding site on actin. D. Calcium is pumped out of the cell to reverse the voltage and cause myosin to degrade
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List the advantages and disadavantages of the switch from persistent chlorinated hydrocarbon pesticides (such as ddt) to nonpersistent organophosphate pesicides. have the benefits of the switch outweighed the disadvantages? explain.
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Amale bird-of-paradise uses a dance to attract mates in which it flaps its tail feathers on the ground and jumps around a potential female mate. a different male bird-of-paradise does a similar dance but it jumps around the female in the opposite direction. the female bird is only attracted to one style of dance, in one direction.
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Cells a and b are the same size and shape, but cell a is metabolically quiet and cell b is actively consuming oxygen. oxygen will diffuse more quickly into cell because . b the oxygen molecules inside cell b have a higher kinetic energy b. a its membrane transport proteins will not be saturated c. a the diffusion gradient there is shallowerd. b the diffusion gradient there is steeper
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How is muscle contraction reversed? A. Calcium binds to calmodulin and is quickly degraded to reliev...
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