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13 Cards in this Set
- Front
- Back
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What is the main joint in the body?
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Synovial joint
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What are the bones held by at the synovial joint ?
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Ligaments
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Ligaments have a high what ?
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They have a high tensile strength (i.e. you can pull them and they won't snap easily), but they are pretty elastic.
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Why are the ends of bones covered in cartilage?
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To stop them from rubbing together and cartilage can be slightly compressed, it can act as a shock absorber
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What is the synovial membrane?
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The synovial membrane (also known as synovium or stratum synoviale) is a specialized connective tissue that lines the inner surface of capsules of synovial joints and tendon sheath.
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What does the synovial membrane release?
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Synovial fluid to lubricate the joints, allowing them to move easily.
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Different joints move in different ways. An example is the hip or shoulder. What directions does it move in?
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The joint can move in all directions, and can also rotate.
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Different joints move in different ways. An example is knee or elbow. What directions does it move in?
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The joint can go backwards and forwards, but not side to side
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Bones are attached to muscles by what?
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Tendons
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Muscles move bones at a joint by what?
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Contracting, they can only pull on bones to move a joint- they cannot push
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What are they called when muscles come in pairs?
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Antagonistic pairs
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What are Antagonistic pairs ?
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When one muscle in the pair contracts, the joint moves in one direction. When the other muscle contracts, it moves in the opposite direction.
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Give an example of Antagonistic pairs
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The biceps and triceps. When the biceps contacts it pulls the lower arm upwards. This bends the arm and when the triceps contracts the lower arm is pulled back down. This straightens the arm.
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