This option lists levels of human structure from the

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20. This option lists levels of human structure from the most complex to the simplest. A. organelle, cell, tissue, organ, organ system B. organ system, organ, cell, tissue, organelle C. organ system, organelle, tissue, cell, organ D. organ system, organ, tissue, cell, organelle E. organ, organ system, tissue, cell, organelle
21. This option lists examples of body's structures from the simplest to the most complex
22. A(n) _____________ is a group of similar cells in a discrete region of an organ performing a specific function.
23. _________________ are the simplest body's structures considered alive.
24. All of the following are human organ systems except A. skeletal. B. endocrine. C. epidermal. D. reproductive. E. lymphatic.
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25. All of the following are organs except
26. We live in an ever-changing environment outside of our body, yet our internal conditions remain relatively stable. This is called
27. When you exercise you generate excess heat and your body temperature rises. Blood vessels dilate in the skin, warm blood flows closer to the body surface, and you lose heat. This exemplifies
28. When a woman is giving birth, the head of the baby pushes against her cervix and stimulates release of the hormone oxytocin. Oxytocin travels in the blood and stimulates the uterus to contract. Labor contractions become more and more intense until the baby is expelled. This is an example of A. negative feedback. B. positive feedback. C. dynamic equilibrium. D. integration control. E. set point adjustment.

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