Coordinated Movement in Muscles 0.0 / 5 ? BiologyHuman, animal and plant physiologyA2/A-levelOCR Created by: Steff06Created on: 13-02-16 10:59 Describe how a pair of muscles work antagonistically to each other As one of the muscles in the pairs contracts, the other muscle will relax to allow movement. 1 of 14 Provide an example of a synovial joint and describe what it is Elbow joint. Synovial joint is the most flexible of all joints. 2 of 14 Function of the tendons The tendons connect bone to muscle. They are very strong and inelastic. 3 of 14 Purpose of the ligaments The ligaments hold the bones in place in the joint. 4 of 14 What does the articular cartilage do? Acts as a shock absorber. 5 of 14 Function of the synovial fluid This lubricates the joints. Allows ease of movement of the bones at the joints. 6 of 14 Purpose of the synovial membrane Joins with the fibrous capsule to form the articular capsule. 7 of 14 How do the triceps and biceps work? They work antagonistically to each other in order to move the forearm at the elbow. 8 of 14 1st step of the operation of the neuromuscular junction. Impulses arriving at the junction cause vesicles to fuse with the pre-synaptic membrane and release acetylcholine into the gap. 9 of 14 2nd step of neuromuscular junction Acetylcholine binds to receptors of muscle fibre membrane (sarcolemma) causing depolarisation. 10 of 14 3rd step Depolarisation wave travel down the tubules (T system). 11 of 14 4th stage T system depolarisation leads to Ca2+ release from stores in sarcoplasmic reticulum (specialised endoplasmic reticulum). 12 of 14 5th step of operation at neuromuscular junction Ca2+ binds to proteins in the muscle, leading to contraction. 13 of 14 6th stage Acetylcholinesterase in the gap rapidly breaks down acetylcholine so contraction only occurs when impulses arrive continuously. 14 of 14
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