HAN 200 Chapter Notes - Chapter 1: Digestion, Catabolism, Anabolism
12 Aug 2016
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* list the functional characteristics necessary to maintain life in humans. * list the survival needs of the body. Maintaining boundaries: keeping internal environment distinct from external environment. Movement: includes the activities promoted by the muscular systems manipulation of the skeletal system: contractility: the muscle cell"s ability to move by shortening. Responsiveness/excitability: the ability (for nerve cells) to sense changes (stimuli) in the environment and then respond to them. Digestion: the breaking down of ingested foodstuffs to simple molecules that can be absorbed into the blood. Excretion: the process of removing wastes, or excreta, from the body. Growth: an increase in the size of a body part of the organism as a whole which is accomplished by increasing the number of cells. Nutrients: contain the chemical substances used for energy and cell building. Oxygen: the chemical reactions that release energy from foods are oxidative reactions that require oxygen, therefore nutrients would be useless without o2.
