Biology A-Level
tension
What tension means in Biology A-Level, as defined for AQA.
Definition of tension
Check what you remember
Read the wording for your board, then hide it and explain tension in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
A negative pressure created at the top of the column when water is drawn out of the xylem in the leaf.
Topics that use tension
- Mass transport in plants (AQA A-Level)
Related terms
- cohesion
- companion cells
- Hydrostatic pressure gradients
- Mass flow hypothesis
- Ringing experiments
- Tracer experiments
- Transpiration
- adhesion to the wall
Using tension in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
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