KIN 275 Lecture Notes - Lecture 1: Coronary Artery Disease, Purkinje Fibers, Resting Potential
14 Apr 2016
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Heat at muscle level can cause fatigue. At 31 will last 52 minutes, more minutes as temp goes down. Competition between cardiovascular and thermoregulatory system > performance deficit. Will get more acidic than blood itself. Production and clearance there will be no fatigue, production more than clearance will equal fatigue. Serves as source of fuel for brain. Failure may occur at nmj - preventing muscle activation. Decrease in ach release (decreased ability to contract) Stress of exhaustive exercise may be too much. Increased with age, has lower vo2 cost. No longer valid in light of new evidence. Thickness varies directly with stress placed on chamber walls. Left ventricle is most powerful of chambers and the largest. Vigorous (endurance) exercise increases size of left ventricle. Blocking a capillary with plaque - will need stent. Carries impulses to sa and av nodes. Ecg - recording of heart"s electrical activity. 3 phases - p wave, qrs complex, t wave.
