Venatal
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#1
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#1
During facilitated diffusion in the proximal convoluted tubule does the Co-transport protein bind an amino acid or glucose molecule to a sodium ion ?
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TheNoobishKnight
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#2
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#2
(Original post by Venatal)
During facilitated diffusion in the proximal convoluted tubule does the Co-transport protein bind an amino acid or glucose molecule to a sodium ion ?
Both. So one Aminoacid-Sodium and the other could be glucose-sodium.
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Venatal
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#3
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#3
Then does it undergo normal diffusion?
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Yasmin Mahmoud
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#4
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#4
is this A2 bio??? please say it is...
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TheNoobishKnight
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#5
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#5
(Original post by Venatal)
Then does it undergo normal diffusion?
Do you mean after they diffuse in? I am very rusty on F214 and have just began revising respiration today, so I can't remember the whole process that well.
Do you use the official OCR book?

(Original post by Yasmin Mahmoud)
is this A2 bio??? please say it is...
Yep ;D
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Yasmin Mahmoud
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#6
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#6
(Original post by TheNoobishKnight)
Do you mean after they diffuse in? I am very rusty on F214 and have just began revising respiration today, so I can't remember the whole process that well.
Do you use the official OCR book?



Yep ;D
THANKYOU LORD. there's me thinking i missed out a massive part..
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TheNoobishKnight
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#7
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(Original post by Yasmin Mahmoud)
THANKYOU LORD. there's me thinking i missed out a massive part..
:cool:
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Venatal
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#8
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#8
So an overview:
-co-transport protein binds an amino acid or glucose molecule to a sodium ion
-diffuses into cell down concentration gradient
-then somehow they detach?
-Actively transported into the blood vessel through the sodium/potassium pump
-amino acids diffuse down concentration gradient through channel proteins

Correct me if I'm wrong.
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TheNoobishKnight
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#9
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#9
(Original post by Venatal)
So an overview:
-co-transport protein binds an amino acid or glucose molecule to a sodium ion
-diffuses into cell down concentration gradient
-then somehow they detach?
-Actively transported into the blood vessel through the sodium/potassium pump
-amino acids diffuse down concentration gradient through channel proteins

Correct me if I'm wrong.
You sort of missed a part of the start.

First the Na+ ions(sodium ions) are actively diffused out of the cells to the tissue.

This decreases the concentration of sodium in that cell, so sodium ions from the proximal tubule lumen diffuse in to the cell along with the glucose or amino acid.

Yh they just detach somehow lol.

The concentration of the amino acid or glucose increase in the cell, so they diffuse out to the other side(tissue fluid).
This process is enhanced by active removal of the glucose or amino acid.

That's pretty much the process. I hope I got it right lol.
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Venatal
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#10
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#10
Alright, thanks!!
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TheNoobishKnight
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#11
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#11
(Original post by Venatal)
Alright, thanks!!
No problemo dude. Use the diagram it is really useful on page 45.
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