Shared Flashcard Set

Details

unit c science in action
biology terms
27
Science
10th Grade
12/16/2009

Additional Science Flashcards

 


 

Cards

Term
Insulin
Definition
Small protein in pancreas. its a hormone. secreted into the body stream and stimulates movement of sugar into cells to use for energy.
Term
reverse osmosis
Definition
happens when water moves from low concentration (high concentration of solute) to high concentration (low concentration of solute)
Term
tissue
Definition
groups of cells performing the same function
Term
shoot system
Definition
everything (part of plant) above ground including tubers
Term
root system
Definition
every part of a plant that is under ground including aerial roots and excluding tubers
Term
tubers
Definition
swollen stems that store food = starch, potatoes, beets.
Term
meristems
Definition
term for groups of tissue in which growth occurs in plants
Term
herbaceous
Definition
non-woody plants (herbs, have no bark)
Term
Ground tissue
Definition
makes up the majority of the plant and is found as a layer beneath the epidermis
Term
sieve tube cells
Definition
make up Phloem tissue, have perforated end walls through which cytoplasm extends
Term
Photosynthesis
Definition
the production of glucose from water, carbon dioxide and sunshine.
Term
Cellular Respiration
Definition
the production of gases when glucose and oxygen are are used to make energy by the cell
Term
Palisade tissue cells
Definition
found just below the upper epidermis. long, rigid rectangular cells packed tightly together that are exposed to suns rays, responsible for photosynthesis
Term
vascular bundle
Definition
Xylum and phloem bunched together
Term
Cohesion
Definition
attraction of water molecules to other water molecules
Term
adhesion
Definition
attraction of water molecules to other molecules of other substances than water
Term
root preasure
Definition
a pressure created in the xylum in the flowing manner
Term
Lenticels
Definition
blisters or slashes on stems. provide alternate pathway for gas exchange in plant
Term
plasmolysis
Definition
the effect on plant cells when water leaves the plant through osmosis because the solution has a greater amount of solute than the plant (hypertonic solution)
Term
pressure flow theory
Definition
-in the leaf the phloem gets loaded with sugar, water then moves into the cells by osmosis.
-in-turn water moves into sieve cells increasing the water pressure in the cells. this pressure in the sieve cells pushes sugar and water in the phloem to other parts of the plant
Term
Stimuli
Definition
a change in the environment that causes a reaction by an organism
Term
phototropism
Definition
plants growing toward light
response of plant to the stimulus of light
Term
positive phototropism
Definition
stem growing toward light
Term
negative phototropism
Definition
roots grow away from light
Term
Gravitropism
Definition
plants responding to earths gravitational force through growth movement.
Term
positive gravitropism
Definition
roots grow toward the force
Term
negative gravitropism
Definition
stems grow against the force
Supporting users have an ad free experience!