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Food Fundamentals Chapter 5
Vegetables
22
Health Care
Undergraduate 1
02/11/2010

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Term
Phytochemicals
Definition
Substances contained in plants that provide some protection against heart disease and certain cancers
ex: beta-carotene and lycopene
Term
Parenchyma Cell
Definition
Type of cell comprising most of the pulp of a vegetable or fruit
have permeable walls
Term
Plastids
Definition
Special structures within the cytoplasm of parenchyma cells
Term
Cytoplasm
Definition
Viscous layer just inside the cell wall of the parenchyma cell; contains plastids
Term
Chloroplasts
Definition
Plastids containing chlorophyll in parenchyma cells
Term
Chromoplasts
Definition
Plastids containing caroenoids (orange pigments) in parenchyma cells
Term
Leucoplasts
Definition
Plastids serving as the site for formation and storage of starch in parenchyma cells
Term
Vacuole
Definition
Largest region of the parenchyma cell; the portion encircled by the cytoplasm
Term
Cellulose
Definition
Complex carbohydrate made up of glucose, but not digested by people
Term
Pectic Substances
Definition
Complex carbohydrates acting as cementing substances between cells; sequence of change during ripening is protopectin to pectin to pectin acid
Term
Hemicelluloses
Definition
Complex carbohydrates made up of several different sugars and sugar derivatives
Term
Waxy Potatoes
Definition
Potatoes witha high content of sugar and low amount of starch; best suited for boiling and other preparations where shape is important
low specific gravity (float in water)
Term
Non-Waxy (Mealy) Potatoes
Definition
Potatoes with a low sugar content and a high starch content; best suited for baking, mashing, and frying
high specific gravity (will sink in water)
Term
Chlorophyll
Definition
Green, magnesium containing pigment in fruits and vegetables
in acid green turns to olive-drab color
in alkaline green brightens
Term
Carotenoids
Definition
Carotenes and related compounds producing the orange pigments in fruits and vegetables
Term
Flavanoids
Definition
Class of pigments contributing to white and red to blue colors in fruits and vegetables; 2 main divisions are the anthoxanthins and the anthocyanins
Term
Anthocyanins
Definition
Group of flavanoids providing the reddish to bluish hues of fruits and vegetables
Term
Anthoxanthins
Definition
Group of flavanoids providing the white or creamy colors in fruits and vegetables
Term
Sinigrin
Definition
Compound in the cabbage family that ultimately is converted to hydrogen sulfide, causing an unpleasant flavor
Term
Wok
Definition
Metallic, bowl-shaped pan developed in Asia for stir-frying
Term
Petcock
Definition
Small opening in the cover of a pressure saucepan to let steam escape and on which the pressure gauge is placed.
Term
Blanching
Definition
Boiling or Steaming for a brief period to inactivate enzymes prior to freezing
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