Tonicity and Osmoregulation

AP Biology· difficulty 3/5

Water always flows from regions of _______ water potential to regions of _______ water potential.

A
$salty; pure$
B
$negative; positive$
C
$lower; higher$
D
$higher; lower$
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Explanation

Water moves down its potential gradient. Pure water has Ψ = 0; adding solute lowers Ψ.

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