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20 terms

Three Types of Passive Transport

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moving cellular material
cells take in food, oxygen, and other substances from the environment and release waste into the the environment
selectively (semi) permeable
regulates what enters and exits the cell, it is based on the size of the particles and the size of the openings in the membrane.
passive transport
the result if a substance moves through the membrane without the input of energy.
Diffusion
when molecules move from an area of higher concentration to an area of lower concentration.
Osmosis
diffusion of water from an area of higher concentration to an area of lower concentration
Fascilitated Diffusion
Some molecules can only enter and exit the cell with the help of molecules in the cell membrane called transport proteins.m
hydrophilic region
water-loving
hydrophobic region
water-fearing
equilibrium
when the relative number of molecules are equal in the two areas; diffusion stops when this is reached
concentration gradient
a difference between concentrations in a space
What happens when water leaves plant cells?
the plant becomes limp
What make up most of the cell membrane?
proteins and phospholipids
What happens when water leaves an animal cell?
The cell shrinks
What Happens When too much water enters an animal Cell?
It will burst
Isotonic
Amount of water transported into the cell is equal to the amount transported out.
Hypertonic
Water is transported out of the cell and the cell shrinks.
Hypotonic
water is transported into the cell and the cell eventually bursts
Active Transports
Moving material against the concentration gradient requires energy
Endocytosis
The process of taking substances into the cell by surrounding it by the cell membrane
Exocytosis
Contents of a vesicle can be released by a cell.