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Exercise and blood

Submitted by kheredia on Fri, 10/25/2019 - 10:25

At rest, the blood flow to the Gi Tract (kidney) is high, in skeletal muscle it’s low. Once we begin to exercise and contract our muscles, there is an increase in metabolic activity which causes dilation. This leads to TPR (total peripheral resistance) dropping, and thus blood pressure drops. This is sensed by baroreceptors and chemoreceptors and they increase levels of CO2 and H+. The sympathetic nervous system reacts by increasing Heart rate, stroke volume, and TPR. The mean arterial pressure also increases. More blood flows to the skeletal muscle and less goes to the abdominal organs. The skeletal muscle has high flow because local dilators are stronger than central constrictors. The reason for low flow in the kidneys is because central constrictors increase resistance there because we need blood flow to our muscles to exercise.