The Cytosolic Ca2+ Concentration Gradient of Sinapis alba Root ...
Active Transport. Moves molecules from low to high concentration AGAINST a concentration gradient...
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Transcript of Active Transport. Moves molecules from low to high concentration AGAINST a concentration gradient...
![Page 1: Active Transport. Moves molecules from low to high concentration AGAINST a concentration gradient Requires energy, so cell must use ATP.](https://reader036.fdocuments.in/reader036/viewer/2022082409/5697bfd71a28abf838caeac5/html5/thumbnails/1.jpg)
Active TransportActive Transport
![Page 2: Active Transport. Moves molecules from low to high concentration AGAINST a concentration gradient Requires energy, so cell must use ATP.](https://reader036.fdocuments.in/reader036/viewer/2022082409/5697bfd71a28abf838caeac5/html5/thumbnails/2.jpg)
Active Transport• Moves molecules from
low to high concentration
• AGAINST a concentration gradient
• Requires energy, so cell must use ATP
![Page 3: Active Transport. Moves molecules from low to high concentration AGAINST a concentration gradient Requires energy, so cell must use ATP.](https://reader036.fdocuments.in/reader036/viewer/2022082409/5697bfd71a28abf838caeac5/html5/thumbnails/3.jpg)
Transport of Large Molecules• Bulk transport brings in or takes out
large molecules such as food, water, or solids▫Endocytosis (in)▫Exocytosis (out)
![Page 4: Active Transport. Moves molecules from low to high concentration AGAINST a concentration gradient Requires energy, so cell must use ATP.](https://reader036.fdocuments.in/reader036/viewer/2022082409/5697bfd71a28abf838caeac5/html5/thumbnails/4.jpg)
Endocytosis: Phagocytosis• Engulfing large particles of food• Cell surrounds food• Food is enclosed in a vesicle and taken into cell
![Page 5: Active Transport. Moves molecules from low to high concentration AGAINST a concentration gradient Requires energy, so cell must use ATP.](https://reader036.fdocuments.in/reader036/viewer/2022082409/5697bfd71a28abf838caeac5/html5/thumbnails/5.jpg)
Endocytosis: Pinocytosis
• Like phagocytosis, except liquid is being taken in
![Page 6: Active Transport. Moves molecules from low to high concentration AGAINST a concentration gradient Requires energy, so cell must use ATP.](https://reader036.fdocuments.in/reader036/viewer/2022082409/5697bfd71a28abf838caeac5/html5/thumbnails/6.jpg)
Receptor-mediated Endocytosis• Molecule binds
to receptor protein
▫ specific shapes!
• Protein-molecule migrates to coated pit
• Pit pinches off, forms a vacuole
• Receptor protein migrates back to membrane
![Page 7: Active Transport. Moves molecules from low to high concentration AGAINST a concentration gradient Requires energy, so cell must use ATP.](https://reader036.fdocuments.in/reader036/viewer/2022082409/5697bfd71a28abf838caeac5/html5/thumbnails/7.jpg)
Exocytosis• Substance is contained within vesicle• Vesicle meets up with inner face of cell
membrane, fuses• Contents are expelled to outside
![Page 8: Active Transport. Moves molecules from low to high concentration AGAINST a concentration gradient Requires energy, so cell must use ATP.](https://reader036.fdocuments.in/reader036/viewer/2022082409/5697bfd71a28abf838caeac5/html5/thumbnails/8.jpg)
•Active Transport in Action