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Anatomy 101
Term | Definition |
---|---|
anatomy | study of strucure |
physiology | the study of function |
cytology | the study of cells of the body |
histology | the study of tissues |
Name the structural hierarchy of organization | simplest to most complex chemical->cellular->tissue->organ->organ system->organism |
homeostasis | ability to maintain stable internal conditions with outside changes ex: circadian rhythms |
boundary maintenance | internal environment remains distinct from the external environment surrounding it |
positive feedback loop | the result or response enhances the original stimulus so that the response is accelerated ex: labor contractions and blood clotting |
negative feedback loop | the output shuts off the original effect of the stimulus or reduces its intensity, prevent sudden severe changes within the body ex: the control of blood sugar by insulin, regulate heart rate, blood pressure, the rate and depth of breathing |
8 characteristics of living organisms | boundary maintenance, digestion, excretion, growth, metabolism, movement, reproduction, irritability (responsiveness) |
5 requirements for life | pressure, stable temperature, nutrients, oxygen, water |
3 components of control mechanisms | affector(sensor), integrator(decision maker),effector(actor) |
atom | the building blocks of elements |
molecule | the smallest unit resulting from the chemical bonding of two or more atoms |
monosaccharide | simple sugars, single chain or single ring structures containing from three to seven carbon atoms |
polysaccharide | polymers of simple sugars linked together by dehydration synthesis |
triglycerides | neutral fats, found chiefly in fatty tissue where they provide insulation and reserve body fuel, known as fats when solid or oils when liquid |
peptide bond | long chains of amino acids joined together by dehydration synthesis |
ATP (adenosine triphosphate) | the primary energy transferring molecule in cells and it provides a form of energy that is immediately usable by all body cells |
DNA (deoxyribonucleic acid) | replicates itself before a cell divides ensuring genetic information in the descendant cells is identical and provides basic instructions for building every protein in the body |