AQA GCSE Physical Education · 8582
Paper 1
Revise: Blood vesselsWhen the muscle contracts, the lumen narrows. This is vasoconstriction, which reduces blood flow to areas such as the digestive system during exercise.
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GCSE Physical Education · key term
Narrowing of a blood vessel's lumen as muscle in its wall contracts, reducing blood flow through it.
Used by AQA and OCR
Paper 1
Revise: Blood vesselsWhen the muscle contracts, the lumen narrows. This is vasoconstriction, which reduces blood flow to areas such as the digestive system during exercise.
Paper 1
The narrowing of blood vessels, restricting blood flow through them.
Revise: Short-term effects of exerciseVessels supplying less immediately active organs, such as parts of the digestive system, narrow through vasoconstriction, restricting their blood supply. These changes direct a greater share of blood flow towards the muscles being used.
For redistribution during exercise, name both the change and its location: vasodilation towards working muscles and vasoconstriction towards the digestive system.
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