KINE 3P05 Lecture Notes - Lecture 8: Cardiac Output, Stroke Volume, Resting Potential
14 Dec 2017
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Document Summary
Cardiac output - the amount of blood pumped per minute gives us an idea of how fast and how effectively the heart can supply blood throughout the body. Q = sv (stroke volume) x hr (heart rate) (term test) 5l/min is average but depends on size a smaller heart will pump out less blood per stroke. Heart rate is not dependent on size because we can adjust it with fitness. Provides pathway which will allow body tissues to eliminate waste. Provide a mechanism which will assist in controlling body temperature. Therefore responsible to sustain or maintain homeostasis of the body. During exercise, the requirements of the muscle tissues can increase 15 to 25 times the resting levels. Two major adjustments of blood flow are necessary: Change in the cardiac output centre response. Hr is regulated through the balance of parasympathetic and sympathetic influence on the sa node (pacemaker)
