Topic 6: Nutrition Flashcards
what is the main source of energy in a diet
carbohydrates
simple carbohydrates
monosaccharides and disaccharides (sugars)
complex carbohydrates
polysaccharides (starches and fibers)
have longer lasting energy
amino acid
simplest form of a protein
indispensible amino acids
Provided through diet because the body does not make them
dispensable amino acids
The body synthesizes these
Positive nitrogen balance
·when the intake of nitrogen is greater than the output.
Positive nitrogen balance is required for..,
growth, normal pregnancy, maintenance of lean muscle mass and vital organs, and wound healing. The body uses nitrogen to build, repair, and replace body tissues.
Negative nitrogen balance
·occurs when the body loses more nitrogen than it gains (e.g., with infection, burns, fever, starvation, head injury, and trauma).
The increased nitrogen loss is the result of…
body tissue destruction or loss of nitrogen-containing body fluids
Nutrition during this period needs to provide nutrients to put patients into positive balance for healing.
what is the most calorie dense nurtrient
fats
what are chemicals that act as catalysts in biochemical reactions
vitamins
vitamins are
organic compounds that are essential to normal metabolism
water soluble vitamins
B complex and vitamin C
absorb easily from the GI tract, they are not stored (urinate out)
fat soluble vitamins
Vitamins A, D, E, K
stored in the fatty compartments of the body
minerals are
inorganic elements essential to the body as catalysts in biochemical reactions.
macrominerals
any of the minerals that people require daily in amounts over 100 mg
microminerals/ trace elements
any of the minerals that people require daily in amounts less than 100 mg
Enzymes
the protein like substances that act as catalysts to speed up chemical reactions. They are an essential part of the chemistry of digestion.
Ptyalin (salivary amylase)
enzyme that acts on cooked starch to begin conversion to maltose
chief cells in stomach secrete
pepsinogen
What secretes gastrin?
G cells (pyloric clads)
gastrin
a hormone that triggers parietal cells to secrete hydrochloric acid (HCl)
Parietal cells
secrete HCl and intrinsic factor (IF), which is necessary for absorption of vitamin B12 in the ileum.
Fat and starch digestion begin when the body produces…
gastric lipase and amylase
bile
stored in gallbladder and it acts as a detergent because it emulsifies fat to permit enzyme action while suspending fatty acids in solution.