Transport across Cell Membranes Flashcards
What does passive mean
A term that means the transport of molecules across a membrane that does not require energy
What is the effect of a LWC on animal cells
The cell shrinks
Why are the components of a cell membrane
Phospholipids and proteins
Molecule needed by a leaf cell for photosynthesis
Carbon dioxide
Substances that diffuses out of cells before building up to a poisonous level
Waste products
The movement of a molecule or ion through a membrane against a concentration gradients. Needs energy
Active transport
The difference in the concentration or a sugar she’d outside and inside a cell
Gradient
Term for when only some molecules are allowed to pass through
Selectively permeable
Membrane component that pumps molecules from a low concentration to a higher concentration
Protein
Effect of a solution with HWC on animal cells
The cell swells and bursts
A molecule which diffuses into a cell and is used to provide energy in aerobics respiration
Glucose
The movement of a substance from an area of high concentration to low concentration
Diffusion
The movement of water molecules form a HWC to a LWC through a selectively permeable membrane
Osmosis
Appearance of a plant cell immersed in pure water
The cell becomes turgid
What does a high temperature do to a membrane
It denatures the protein
