I cant find a definition or related word for it!!!!!!!!! ive been on google for so long but i cant find it!
and the definition cant be longer than 3 sentences! can you?
please! ill answer some of your questions just pleaasseee im running out of time!
and the definition cant be longer than 3 sentences! can you?
please! ill answer some of your questions just pleaasseee im running out of time!
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cell transport can be defined as the movement of molecules in and out of the cells across cell membrane.
this movement is achieved by many cell transport mechanisms like Diffusion
Osmosis
simple diffusion
Facilitated diffusion
Endocytosis
Exocytosis
Pinocytosis
Active transport
passive transport
Some major examples of diffusion in biology:
• Gas exchange at the alveoli — oxygen from air to blood, carbon
dioxide from blood to air.
• Gas exchange for photosynthesis — carbon dioxide from air to
leaf, oxygen from leaf to air.
• Gas exchange for respiration — oxygen from blood to tissue cells, carbon dioxide in
opposite direction.
• Transfer of transmitter substance — acetylcholine from presynaptic to postsynaptic
membrane at a synapse.
• Osmosis — diffusion of water through a semipermeable membrane.
u can also give examples about phagocytosis and exocytosis -
In Phagocytosis the cell engulfs a food particle . The vesicle containing food then fuses with a lysosome carrying digestive enzymes.
In exocytosis wastes and cell products are packaged by Golgi apparatus in sacs called Golgi vesicles. Gogi vesicles fuse with the cell membrane and the materials in the vesicles are secreted out of the cell.
check these links,they r lot helpful
http://library.thinkquest.org/trio/TR011…
http://www.biologymad.com/resources/diff…
http://santasusana.org/pakelly/AP%20Bio/…
this movement is achieved by many cell transport mechanisms like Diffusion
Osmosis
simple diffusion
Facilitated diffusion
Endocytosis
Exocytosis
Pinocytosis
Active transport
passive transport
Some major examples of diffusion in biology:
• Gas exchange at the alveoli — oxygen from air to blood, carbon
dioxide from blood to air.
• Gas exchange for photosynthesis — carbon dioxide from air to
leaf, oxygen from leaf to air.
• Gas exchange for respiration — oxygen from blood to tissue cells, carbon dioxide in
opposite direction.
• Transfer of transmitter substance — acetylcholine from presynaptic to postsynaptic
membrane at a synapse.
• Osmosis — diffusion of water through a semipermeable membrane.
u can also give examples about phagocytosis and exocytosis -
In Phagocytosis the cell engulfs a food particle . The vesicle containing food then fuses with a lysosome carrying digestive enzymes.
In exocytosis wastes and cell products are packaged by Golgi apparatus in sacs called Golgi vesicles. Gogi vesicles fuse with the cell membrane and the materials in the vesicles are secreted out of the cell.
check these links,they r lot helpful
http://library.thinkquest.org/trio/TR011…
http://www.biologymad.com/resources/diff…
http://santasusana.org/pakelly/AP%20Bio/…
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A mechanism of transport across a membrane in which two different molecules move in the same direction.
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Cellular transport refers to the movement of compounds across the outer wall or membrane of the cells
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something random