Cell permeability! Flashcards
(11 cards)
Not all objects are permable, impermable, or selectively permable.
True or False?
False!
What is a permable object?
An object which lets water and air to pass through easily.
What is an impermable object?
An object that does not let air or water to pass through at all.
What is a selectively permable object?
An object which allows certain substances to pass through, but not all.
Is a cell membrane permable, impermable, or selectively permable?
It is selectively permable. It blocks harmful substances from entering the cell.
What is cytosis?
A way to transport moving molecules in and out of the cell.
What are the three types of cytosis?
- Exocytosis - Transporting molecules OUT of the cell
- Endocytosis - Transporting molecules INTO the cell
- Transcytosis - Transporting molecules IN, OUT, and ACROSS the cell
What is diffusion?
Bonus: How is diffusion used in cells???
Diffussion is when particles moves from an area of high concentration to low concentration.
Bonus: Diffusion is used to move oxygen into a cell
What is osmosis?
A form of diffusion that uses water. When water moves from an area of high concentration to an area of low concentration through a semi-permable cell.
This allows for cells to get the right number of water, not too much or too little.
For example, if a fish which previously lived in the sea was moved into the lake, it wouldn’t survive since it would move to a higher water concentration, which it isn’t used to.
What is cellular transportation? What are two example of this?
Movement of substances in and out of a cell.
2 examples: osmosis and diffusion
What is the difference between osmosis and diffusion???
In osmosis, it must be water that is moving and it must go through a semi-permable membrane.
In diffusion, it can be any substance that is moving through anything.
