BIOL 1301 Lecture Notes - Lecture 34: Organelle, Lactic Acid

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16 Aug 2018
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One of 4 tissue types in the body. Why we need cardiac and smnnth muscles: ensure there is necessary oxygen, aid digestion, dilate or constrict blood vessels, thermoregulatory control. 60-65% of an adult"s total energy consumption is used for maintaining everyday function. Skeletal muscles uses 30% of this (65% of total energy consumption). In humans, this happens in the organelle called mitochondria": aerobic respiration (using oxygen; not referring to breathing, anaerobic respiration (aka lactic acid fermentation) This is a much less efficient prncess and only used if oxygen is not readily available. This process happens in the cytoplasm (outside of the nucleus/organelles) of cells. Let"s see how this atp comes into play . Progression of maximal force (least to most)t concentric. Eccentric contractions appear to be the most energy efficient. Muscle fibre typest: different across muscles, changes with training and lifestyle, different across ethnicity.

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