BIOL 1119 Lecture 11: Cardiac Output Lecture 11

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Map = push" means more local blood pressure trying to get more local ow. And decrease local resistance to increase local ow back up to normal (and hopefully constant) Map/local resistance = local flow: increase map above normal (always) to increase bp and local ow above normal. For ex, acidosis is building and threatening parts of the body like the brain and the lungs (or in very active skeletal muscle) And decreases local resistance to increase local ow above normal: some local vasodilation is possible even with widespread vasoconstriction: as long as enough tpr maintained. Cardiac output (continued: chronotropic effects of chemicals: when is the change in electrolyte levels most important? (depolarization? repolarization? on effect of the heart) Chrontopic chemicals: affect heart rate, blood born norepinephrine (ne) and epinephrine (catecholamines) flowing around in the blood, they are chemicals. They have the same effects: adrenal medulla.

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