AVS-4160 Lecture Notes - Lecture 15: Cholinesterase, Troponin, Oxidative Phosphorylation
1 Nov 2016
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Document Summary
A horse"s intestinal contents comprise a large portion of its body weight because the horse has a high fiber diet. Plasma volume changes throughout the day as a result of the horses fed state. If blood volume is too low before exercise, the horse is unable to adequately exchange gases. Changes that the autonomic nervous system makes are due to vasoconstriction and shunting. The autonomic nervous system changes the blood volume, regardless of the horse"s state of conditioning. Better q = increased cardiac output = increased cardiac efficiency. Changes to plasma volume occur within a week or two of initiation of training. With training, the water fraction of the blood increases. Response to acute exercise changes with training. Increased capillarization results in increased oxygen delivery through a wider system that slows the blood flow at the level of the muscle. Training should improve exercise induced pulmonary hemorrhage, rather than making it worse. Waste product removal improves with increased capillarization.
