Water & Balance In Cells Flashcards
(14 cards)
What is the regulation of water in cells?
Osmoregulation: It is the process to maintain water balance across the membrane.
What is the characteristic of the cell membrane?
The cell membrane is selectively permeable.
What does ‘impermeable’ mean?
It refers to something that does not allow substances to pass through.
What does ‘permeable’ mean?
It refers to something that allows substances to pass through or be absorbed.
What is selective permeability?
It permits some molecules to move through while not allowing others.
Can the cell prevent harmful materials from entering?
No, selective permeability is not a decision the cell makes.
What is diffusion?
It is the movement of materials from high concentration to low concentration.
What is facilitated diffusion?
The movement of materials from high to low, but with the help of protein channels.
How does facilitated diffusion differ from simple diffusion?
Facilitated diffusion has a protein channel to allow materials to enter the cytoplasm, while simple diffusion does not.
What does the root word ‘hyper’ mean?
Too much/over.
What does the root word ‘hypo’ mean?
Too little/below.
What does the root word ‘iso’ mean?
Equal.
What does ‘glycemia’ refer to?
Sugar.
What is osmosis?
The movement of water molecules from high to low.
