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Active & Passive Transport

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by

Cole Avery

on 18 February 2016

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Transcript of Active & Passive Transport

Active & Passive Transport
Active Transport
Active transport is the cell movement of molecules across the plasma membrane against a concentration gradient.
(Requires energy)
The types of Active Transport: Endocytosis
One of the types of active transport is Endocytosis. Endocytosis is when the cell transports molecules with vesicles into the cell using the plasma membrane.
Exocytosis
Exocytosis is a process in which an a vesicle releases molecules outside of the plasma membrane.
Sodium Potassium Pumps
Sodium Potassium Pumps move sodium and potassium ions across the plasma membrane. it involves the hydorlysis of ATP to provide energy.
Passive Transport
Passive transport is a movement of molecular substances across the plasma membrane without the need of using energy.
(Doesnt Require Energy)
Simple Diffusion
Simple Diffusion is when a substance passes through a membrane without the help from a membrane protein. The force that drives the substance from one side of the membrane to the other is the force of diffusion.
Facilitated Diffusion
Facilitated Diffusion uses transport proteins to move other ions and small molecules across the plasma membrane.
Filtration
Filtration is movement of water and solute molecules across the cell membrane due to hydrostatic pressure generated by the cardiovascular system. Depending on the size of the membrane pores, only solutes of a certain size may pass through it.
Osmosis
Osmosis is the movement of water molecules across a selectively permeable membrane. The net movement of water molecules through a partially permeable membrane from a solution of high water potential to an area of low water
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