GCSE PE Antagonistic Muscle Pairs 0.0 / 5 ? Physical EducationMuscular systemGCSEEdexcel Created by: x.lily.revisionCreated on: 15-01-22 16:54 What is an antagonistic muscle pair? when muscles work in pairs to cause movement - one contracts and the other relaxes 1 of 11 What is an agonist? contracting, shortening muscle 2 of 11 What is an antagonist? relaxing, lengthening muscle 3 of 11 What happens when the quadricep is the antagonist? the quadricep relaxes and lengthens while the hamstring contracts and shortens (agonist) to flex the knee 4 of 11 What happens when the hamstring is the antagonist? the hamstring relaxes and lengthens while the quadriceps contracts and shortens (agonist) to extend the knee 5 of 11 What happens when the triceps are the antagonist? the triceps relax and lengthen while the biceps contracts and shorten (agonist) to flex the elbow 6 of 11 What happens when the biceps are the antagonist? the biceps relax and lengthen while the triceps contracts and shorten (agonist) to extend the elbow 7 of 11 What happens when the hip flexors are the antagonist? the hip flexors relax and lengthen while the gluteals contract and shorten (agonist) to extend the leg backwards 8 of 11 What happens when the gluteals are the antagonist? the gluteals relax and lengthen while the hip flexors contract and shorten (agonist) to flex the leg forwards 9 of 11 What happens when the tibialis anterior is the antagonist? the tibialis anterior relaxes and lengthens while the gastrocnemius contracts and shortens (agonist) to plantar flex the ankle 10 of 11 What happens when the gastrocnemius is the antagonist? the gastrocnemius relaxes and lengthens while the tibialis anterior contracts and shortens (agonist) to dorsiflex the ankle 11 of 11
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