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17 Cards in this Set

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metabolism
The sum of all chemical reactions that occur in the body. Can be divided into two reaction types.
catabolic reactions
break down large chemicals and release energy
anabolic reactions
build up large chemicals and require energy
Ingestion
the acquisition of food and other raw materials.
digestion
The process of converting food into usable soluble form so that it can pass through membranes in the digestive tract and enter the body.
Absorption
The passage of nutrient molecules through the lining of the digestive tract into the body proper. Absobed molecules pass through cells lining the digestive tract by diffusion and active transport.
Transport
The circulation of essential compounds required to nourish the tissues and the removal of waste from tissues.
Assimilation
The building up of new tissues from digestive food.
Respiration
The consumption of O2 by the body. Cells use O2 to convert glucose--> ATP, a ready source of energy for cellular activities.
Excretion
The removal of waste products (CO2, H2O, and urea) produced during metabolic processes like respiration and assimilation.
Synthesis
The creation of complex molecules from simple ones (anabolism).
Regulation
The control of physiological activities.
Homeostasis
The body's metabolism functions to maintain its internal environment in a changing external environment. Includes regulation by hormones and nervous system.
Irritability
The ability to respond to a stimulus and is part of regulation.
Growth
An increase in size caused by a synthesis of new materials
Photosynthesis
The process by which plants convert CO2 + H20 --> carbohydrates. Sunlight is harnessed by chlorophyll to drive this reaction.
Reproduction
The generation of additional individuals of a species.