| Re: Biology band 6 cut off excretion doesn't happen in the general kidney. it happens first with the nephron.
think about it.
it was worth six marks.
label filtration and explain (one + one = two)
label reabsorption and explain (one + one = two)
label excretion and explain (one + one = two)
we spent a whole unit on 'maintaining a balance', not 'taking a piss'.
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