Kinesiology 2230A/B Lecture Notes - Lecture 6: Muscle Contraction, Biceps, Blood Test
20 Apr 2016
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Breaking cross bridges of actin and myosin: during lengthening contraction is when injury can occur. Just before foot strikes the ground that the bicep femoris is injured. Usually occurs past 50m down the course (100m sprint) By the age of four, budhia had run and completed 48 marathons. He was entered into record books for running 40 miles in under seven hours last year at age 5 (6min 30s km) Interface between muscle and tendon, monitor changes in tension. Nerves intertwined in tendon, as muscle generated greater force, the force is transmitted to tendon area. Main function: monitor changes in tension i. e. force that is being generated: feedback information about force levels in the muscle to the cns. Feel pain due to ischemia (lack of blood supply), accumulation of end products. H+ ions increase, lactate buildup; decreases ph; more acidic; acid burns.
