A Level Biology Revision "Translocation in the Phloem"
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- เผยแพร่เมื่อ 11 ก.ย. 2024
- You can find all my A Level Biology videos fully indexed at www.freescienc...
In this video, we look at translocation in the phloem. First we explore what is meant by a source and a sink. We then explore how active loading of sucrose into the phloem takes place in the source and how this leads to mass flow of assimilates in the phloem. Finally, we look at the evidence for this active model of translocation.
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Hi. Thanks for the comment. I'm glad that you're finding my videos useful. I'm now around 45% of the way through both Biology and Chemistry A level, so I'm nearly finished the AS content.
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4:24 Hello Shaun, one question, could it also be, because of the reduced water potential of the cells in the sink and therefore the increase W.P. in the phloem, that water ALSO moves into the cells in the sink?
ik this is extremely late, but yes you're right
i dont understand..where do the hydrogen ions come from
Hydrogen ions are naturally present in the cytoplasm due to the splitting of water molecules.
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