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These are not necessarily the mechanisms, but I believe you are referring to active and passive transport. Active transport uses energy (from adenosine triphosphate, or ATP) to move solutes from an area of low concentration to an area of high concentration This movement is against the concentration gradient, so energy is required. Passive transport is when the solutes basically fall from an area of high concentration to an area of low concentration across a membrane. Since solutes naturally seek to equalize concentration across a membrane, no added energy is required for passive transport.
Wiki User
∙ 14y ago
Wiki User
∙ 11y agoosmosis and diffusion
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Diffusion in cells?
when something can enter or exit the cell
What is the part of a cell where charges enter and exit?
electrodes.
Which part of a cell allows certain materials to enter the cell and other material to exit the cell?
This part of the cell is refferred to as the cell 'membrane'
How many oxygen molecules need to enter or exit the cell to achive equilibrium?
. . . . . .
From stage of the cell cycle do cells sometimes exit?
Sometimes the cells exit the cell cycle (usually from G 1 phase) and enter the G 0 phase.
What is used to help substances enter or exit the cell?
Osmosis
What is the characteristic of a sell membrane that controls which substances can enter and exit the cell?
The selective permeability, also called semi-permeability, of the membrane controls which substances cant enter and exit the cell.
What is the characteristics of a cell membrane controls which substances can enter and exit the cell?
selective permeability
What is the characteristic of a cell membrane that control which substances can enter and exit the cell?
selective permeability
What is the characteristic of a cell membrane that the controls which substances can enter and exit the cell?
selective permeability
What cell is used to help substances enter or exit the cell membrane?
Osmosis
What is the characteristic of a cell membrane that's controls which substances can enter and exit the cell?
selective permeability
The flexible outer boundary of the cell through which substances enter and exit is called?
Cell membrane
Which are the small openings in the nuclear envelope that regulate which substances enter and exit the nucleus?
The small openings in the nuclear envelope that regulate what substances enter and exit the nucleus are called nuclear pores. A process of depositing a vesicle's contents outside the cell is exocytosis.
Which layer controls selective permeability?
The cell membrane controls selective permeability. Larger substances can enter the cell through endocytosis and exit through exocytosis.
What functions of the cell membrane do for the cell?
It controls the entry and exit of substances.
What is the characteristic of a cell membrane that controls which substances that can either enter and exit the cell?
Selective permeable
