An organism's structure and function ultimately depend on what two factors within its cells?

1) d

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2) B

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3) e

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4) C

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5) To maintain homeostasis, the control system must be able to (1) detect deviations from normal in the internal environmental factor that needs to be held within narrow limits; (2) integrate this information with any other relevant information; and (3) make appropriate adjustments in the activity of the body parts responsible for restoring this factor to its desired value.

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6) The heart increases its strength and efficiency so that it pumps more blood per beat. This allows the muscles to receive more oxygen to meet the increased demand. Because of the increased pumping ability, the heart does not have to beat as rapidly to pump a given quantity of blood as it did before beginning the exercise regimen.

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7) Despite the potential, ESC research is fraught with controversy because of the source of these cells: they are isolated from discarded embryos from abortion clinics and in vitro fertility (test-tube baby) clinics. Opponents of using ESC are morally and ethically concerned because embryos are destroyed in the process of harvesting these cells. Proponents argue that these embryos were destined to be destroyed anyway (a decision already made by the parents of the embryos) and that these stem cells have great potential for alleviating human suffering. As such, ESC science has become inextricably linked with stem cell politics.

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8) The digestive system breaks down the sugary meal and transports the sugars into the blood. The circulatory system transports the sugars throughout the body. If the level of glucose in the blood increases above optimum, the endocrine system releases insulin that causes body cells to absorb glucose, thus lowering the glucose to optimum levels in the blood.

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9) Exocrine glands secrete through ducts to the outside of the body (or into a cavity that opens to the outside). Examples are sweat glands and glands that secrete digestive juices. Endocrine glands lack ducts and release their secretory products, known as hormones, internally into the blood. For example, the pancreas secretes insulin into the blood, which transports this hormone to its sites of action throughout the body.

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10) The ink would be like the chemical level and it forms the letters, which would be like cells. Two or more letters together make up a word, which is like a tissue. Two or more words make up a sentence, which is like an organ; and two or more sentences make up a paragraph, which is like a body system. All paragraphs on a page would be like all body systems together, which make up the human body.

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