A-LevelBiologyTransport in mammals9700/12 · May/June 2022 · Q331 Mark
Which description of movement of substances during tissue fluid formation is correct?
ALow hydrostatic pressure forces substances out of the capillary at the arterial end allowing
small substances to enter the fluid that bathes the cells.
BTissue fluid moves back into the venule due to a net hydrostatic pressure change in the
capillary.
CMovement of water in tissue fluid into the capillary by osmosis is due to the low water
potential and low hydrostatic pressure inside the capillary.
Dhigh water potential of the surrounding tissue fluid causes substances to leave the
capillaries at the arterial end.
✓ Correct answer
C: Movement of water in tissue fluid into the capillary by osmosis is due to the low water potential and low hydrostatic pressure inside the capillary.
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