HSS 2111 Lecture Notes - Lecture 3: Titin, Big Area, Neuromuscular Junction
27 Jan 2017
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Document Summary
Functions: not only movement, posture, support, also storage, fluid pump-such as blood pump especially when blood need to come up against gravity. Origin: fixed attachment (does not move) -where muscle starts. Insertion: where there are movements and where the muscle ends. Muscle fiber: that is lowest level of the muscle cell. Convergent: layered as fan shaped muscle -still has same direction of the layer (flat and more movement but less of strength) *larger the cross section the larger the strength. Circular: has opening and closing of the muscle: pennate: feather like structure -more forced strength than parallel muscle, but shorter length that gives less of a movement. Unipennate: all fibres on 1 side of tendon with strong force production from one direction. Bipennate: fibres on both sides of tendon same in 2 directions - central tendon pulled in same direction so very strong. Multipennate: tendon branches within muscles - weaker force production from multiple directions.
