The prospect of inhibiting myostatin and growing larger muscles may be tempting to a great many
people. Is there any danger to increasing muscle mass? What will be an ideal response?
Compared to carrying excess weight as fat, having increased muscle mass is a far healthier option.
However, it must be remembered that our body has evolved to operate within relatively narrow
parameters. The increase in body size will stress the heart as it will have more tissue to supply with
blood. As well, the increased mass will result on increased stress to the knees, hips, and back, possible
resulting in painful joints later in life.
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An ________ of a nerve cell is the temporary depolarization and repolarization of the cell membrane.
Fill in the blank(s) with the appropriate word(s).
Early in mitosis, chromatin condenses. Which process takes place more easily as a result?
a. disappearance of the nuclear envelope b. replication of DNA c. orderly distribution of DNA into the two new nuclei d. formation of the mitotic spindle e. disintegration of nucleoli
Which of the following is NOT true of
complement proteins?
a. they are part of the third line of defense b. they may be activated by antigens c. they can activate other complement proteins d. some bind to pathogens making them a target for phagocytosis e. all of these are NOT true of complement proteins
Why are neocallimastigomycetes being studied for biofuel production?
A. They can ferment glucose into alcohol. B. They can generate methane. C. They provide energy to power fermentation. D. They can release fermentable sugars from structural polysaccharides. E. They can extract pollutants from biofuel starting materials.