GCSE Biology Function Based Muscle Groups

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GCSE Biology - Function Based Muscle Groups • Try our Online GCSE Revision Today for £19.99: http://www.revisionapp.co.uk/product/... • Function based Muscle Groups • It is important to know the big important muscles and which movements are performed by these groups: • Pectorals: Press ups use these muscles around the chest. • Biceps: Curling weights is great for this muscle group. • Quadriceps: Step ups and squats work this thigh muscle group. • Deltoids: Pull ups and bench presses. • Trapezius: Pull ups work this grouping behind the neck and back of shoulder. • Triceps: Press ups work these as well as the pectorals. • Gluteals (glutes): Lunges are great for these muscles as well as the hamstring. • Muscles Pull and Don't Push • Muscles used for movement are attached to two different bones by tendons. To make a joint move in two directions, you need two muscles to be able to pull the joint in two directions. This is called an antagonistic pair. • One muscle will contract (shorten and pull) while the other relaxes (lengthens) or vice versa. There are also muscles called ‘synergists' that hold a stationary bone still, like the shoulder when you curl a bicep. • Two Types of Muscle Contraction • Isometric Contraction: The muscle stays the same length and holds contraction, like when performing a 'plank'. The muscle contracts but stays the same length. Nothing moves. • Isotonic Contraction: The muscle will change length (contract) in order to pull a joint and in turn something will move. For example, when doing bicep curls, lifting the weight and varying the muscle length.

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