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Ch 5 Activities of Cells
Life Science (BJU)
27
Science
7th Grade
10/02/2011

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Cards

Term
tissue (pg 66)
Definition
a group of similar cells that together perform a specific function
Term
organs (pg 66)
Definition
two or more tissues that work together to perform a specific function
Term
division of labor (pg 66)
Definition
the condition in which certain organs and tissues of multicellular organisms perform specialized functions that are not being performed by other tissues and organs
Term
turgor pressure (pg 67)
Definition
water pressure inside a plant cell's central vacuole; causes the stiffness of the plant cell
Term
rapid sprouting of seeds; tree roots moving concrete path; low pressure example would be drooping leaves of a plant that is lacking water (pg 67)
Definition
examples of turgor pressure
Term
cellular respiration (pg 68)
Definition
the breakdown of an energy source by cells to obtain usable energy (sugar is the most common energy source)
Term
catalysts (pg 68)
Definition
a substance that affects the rate of a reaction but is not changed in the reaction
Term
aerobic cellular respiration (pg 69)
Definition
the process by which cells use oxygen to obtain usable energy from an energy source
Term
anaerobic cellular respiration (pg 69)
Definition
the process by which cells obtain energy from an energy source without using oxygen
Term
alcoholic fermentation (pg 70)
Definition
anaerobic cellular respiration that produces alcohol and carbon dioxide from glucose
Term
lactic acid fermentation (pg 70)
Definition
a type of anaerobic cellular respiration that produces lactic acid from sugar
Term
enzyme (pg 68)
Definition
a protein that serves as a catalyst for a cellular reaction
Term
reactants/products of aerobic cellular respiration(pg 69)
Definition
sugar + oxygen =>
carbon dioxide + water + energy
Term
reactants/products of anaerobic cellular respiration (alcoholic fermentation) (pg 70)
Definition
sugar + yeast/bacteria =>
carbon dioxide + alcohol + energy
Term
reactants/products of anaerobic cellular respiration (lactic acid fermentation) pg 70
Definition
sugar + bacteria =>
carbon dioxide + lactic acid + energy
Term
mitochondria (pg 69)
Definition
the cellular organelles in which aerobic respiration occurs to release usable energy from food;
Term
mitochondria (pg 69)
Definition
recharges certain molecules during cellular respiration
Term
aerobic cellular respiration (pg 70)
Definition
which process generates more energy from sugar? aerobic or anaerobic cellular respiration
Term
photosynthesis (pg 71)
Definition
the process that forms simple sugars from carbon dioxide and water, using light energy in the presence of chlorophyll
Term
reactants/products of photosynthesis (pg 71)
Definition
carbon dioxide + water + light energy=>
sugar + oxygen
Term
pigments (pg 72)
Definition
colored substances that absorb light energy
Term
chlorophyll / green (pg 72)
Definition
the primary pigment of photosynthesis and it's color
Term
chemical energy (pg 72)
Definition
in photosynthesis, light energy is converted into this kind of energy
Term
chlorplasts (pg 72)
Definition
cellular organelles that contain chlorophyll and other pigments; the organelle in which photosynthesis occurs
Term
chlorplast outer membrane forms outer boundary; inner membrane like stacks of flattened sacs overlapping and connecting themselves in many places; chlorophyll located in inner chloroplast membrane (pg 72)
Definition
describe the chloroplast structure
Term
lipids, proteins, nucleic acids (Pg 73)
Definition
these molecules are not made BY photosynthesis, but the ENERGY needed to make them comes from photosynthesis
Term
central vacuole (pg 67)
Definition
the large vacuole located in the middle of a plant cell and certain other cells; collects and holds water
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