The Hierarchy of Complexity - ANSWER--Organ system-organs-tissues-cells-
organelles-molecules-atoms
situs invertus - ANSWER--heart is on the opposite side
Organization - ANSWER--living things exhibit a higher level of organization than
nonliving things
Cellular Composition - ANSWER--living matter is always compartmentalized into
one or more cells
Metabolism - ANSWER--internal chemical reactions; the sum of all biochemical
events that occur in the body
Responsiveness - ANSWER--ability to sense and react to stimuli (irritability or
excitability)
Movement - ANSWER--of organism and/or of substances within the organism
Characteristics of life - ANSWER--organization, cellular composition,
metabolism, responsiveness and movement, homeostasis, development,
reproduction, evolution
Homeostasis - ANSWER--the ability to detect change, activate mechanisms that
oppose it and thereby maintain stable internal conditions
Feedback Loops - ANSWER--biological mechanisms where homeostasis is
maintained
Homeostasis in Body Temperature - ANSWER---If too warm, vessels dilate in the
skin and sweating begins (heat-losing mechanism)
-If too cold, vessels in the skin constrict and shivering begins (heat-gaining
mechanism)
Negative Feedback - ANSWER--a mechanism of response in which a stimulus
initiates reactions that reduce the stimulus
Receptor - ANSWER--structure that senses change in the body
Integrating (control) Center - ANSWER--control center that processes the sensory
information, "makes a decision," and directs the response
Effector - ANSWER--cell or organ that carries out the final corrective action to
restore homeostasis
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