Transport Proteins: Pumps, Channels, Carriers

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Video Summary:
Transport proteins create a passage for lipid insoluble and larger molecules to cross the biological membrane. They can be pumps, channels or carriers. Pumps use energy from ATP to drive the primary active transport of a substance against its electrochemical gradient. Channels provide continuous passage for passive diffusion down the electrochemical gradient. Diffusion through channels is faster as multiple ions can pass through the channel during each opening. Pores are always open and gated channels switch between open and closed states. Carriers do not provide continuous passage. Movement through them is relatively slow. Uniporters move a single type of substance down its concentration gradient. Symporter moves one substance downhill and uses it's energy to move other substance uphill in same direction. Antiporters also move one substance downhill and uses it's energy to move other substance uphill but in opposite direction.

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Dr Vipul Navadiya

DISCLAIMER: This video is for education purposes only. Although every effort is made to ensure the accuracy of the material, viewers should refer to the appropriate regulatory body/authorized websites, guidelines, and other suitable sources of information as deemed relevant and applicable. In view of the possibility of human error or changes in medical science, any person or organization involved in the preparation of this work accepts no responsibility for any errors or omissions, or results obtained from the use of information in this video.