Lesson 21 Flashcards
for passive transport, what is the direction of molecule movement?
high to low is the way to go
what can go through the cell membrane? (9)
H2O, CO2/O2, C6H12O6, indicators, amino acids, monosaccharides, fatty acids, glycerol, NH3/NH4
what can’t go through the cell membrane? (3)
proteins, polysaccharides, NaCl
what are the indicators we used in class so far?
Iodine (starch indicator) and Benedict’s solution (glucose solution)
what is plasmolysis and flaccid?
plasmolysis is the shrinking of a cell due to loss of water; dehydration, and flaccid is the cell’s state– shrunken/shriveled
what is turgor and turgid?
turgor is the movement of water going into the cell, turgid is the cell’s state of being full
all about the concentration of a substance, not _____
amount
examples of passive transport
diffusion, osmosis, and facilitated transport
what is diffusion?
the general term for molecules moving from high to low; ex: perfume
what is osmosis?
ONLY when water diffuses through a cell membrane; high to low
what is facilitated transport?
high to low; however, through a protein in the cell membrane
examples of active transport:
endocytosis and exocytosis
what is exocytosis?
forcing out; low to high; requires ATP; ex: paramecium contractile vacuole
what is endocytosis?
forcing in; low to high; uses ATP
what are the two types of endocytosis? what are they?
pinocytosis (small amounts transported) and phagocytosis (large amount transported)
