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Hum ant 2 exam 3
Metabolism, Water, Acid-Base Balance
10
Physiology
Undergraduate 4
04/02/2009

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Term
Nutrient
Definition
a substance that promotes normal growth, maintenance, and repair.

Major Nutrients are carbs, lipids, and proteins.

others are vitamins and minerals and water
Term
Carbohydrates
Definition
Complex = starches
simple
broken down to glucose, used by cells to make atp. Excess is converted to glycogen
Term
Lipids
Definition
Most abundant = triglycerides, found in animal and plants

essential fatty acids = linoleic and linolenic acid found in vegetables (unsat fats)
Term
Functions of dietary fats:
Definition
-help the body to absorb viatmins
-are a major energy fuel of liver cells and skeletal muscle
-component of myelin sheaths and all cell membranes
Term
Complete and Incomplete proteins
Definition
Complete meet all the body's amino acid needs and are found in eggs, milk, milk products, and meat, and fish.

Incomplete proteins are found in legumes, nuts, seeds, grains, and vegetables.
Term
Proteins supply:
Definition
-Essential amino acids, the building blocks for nonessential amino acids
-Nitrogen for non protein nitrogen-containing substances.

Daily intake should be .8g/kg of body weight
Term
Nitrogen balance
Definition
the rate of prtein synthesis equals the rate of breakdown and loss
-positive = synthesis > breakdown (normal in children and tissue repair)
-negative = synthesis < breakdown (stress, burns, infection, or injury)
Term
Vitamins
Definition
organic compounds needed for growth and good health
-Help body use nutriens and function as coenzymes
-only D,K, and B are made by body
-B complex and C are water soluble.
-B12 needs gastric intrinsic factor to be absorbed
Term
Metabolism
Definition
all chemical reactions necessary to maintain life
Term
Cellular respiration
Definition
-food fuels are broken down w/in cells and some of the energy is captured to produced ATP
-Anabolic = small to big
-Catabolic= big to small
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