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15 Cards in this Set

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Metabolism
The sum of all chemical reactions that occur in the body.
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 a usable soluble form so that it can pass through membranes in the digestive tract and enter the body
Absorbtion
the passage of nutrient molecules through the lining of the digestive tract into the body proper. Absorbed molecules pass through cells lining the digestive tract by diffusion or active transport
Transport
the circulation of essential compounds required to nourish the tissues and the removal of waste products from the tissues
Assimilation
the building up of new tissues from digested food materials
Respiration
The consumption of oxygen by the body. Cells use oxygen to convert glucose into ATP, a ready source of energy for cellular activities.
Excretion
the removal of waste products (such as carbon dioxide, water, 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. The body's metabolism functions to maintain its internal environment in a changing external environment. This is known as homeostasis and includes regulation by hormones and the nervous system. Irritability is the ability to respond toa stiumuls and is part of regulation.
Growth
an increase in size caused by a synthesis of new materials
Photosynthesis
the process by which plants covnert CO2 and H20 into carbohydrates. Sunligh is harnessed by cholorophyll to drive this reaction.
Reproduction
the generation of additional individuals of a species