KINE 1020 Lecture 2: Winter - Lecture 2
23 Feb 2017
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Document Summary
Speed of relation tends to match speed of contraction. After adding lots of stimuli then it will stay at a contestant rate. No relation time when you have very fast action potential frequency because you are constantly releasing calcium, so calcium stay connected to troponin: number of fibers per motor unit and cross sectional area. The total tension a muscle can develop depends on two factors: the amount of tension developed by each fibre and, the number of fibers contracting at a given time. The number of fibers in each motor unit (motor unit size) and. Small motor unit and large motor units refer to the quantity of fibers. When activated- all muscle fibers within a mu contract. With only 1 mu activated- weak contraction. Stronger contractions need more mu recruited: mu # fibers: more fibers in one mu> tension, mu quality - # of mu, mu type fast fatiguing vs fatigue resistant. Each unit is spread out throughout body.
