KIN 121 Lecture Notes - Lecture 16: Stroke Volume, Red Blood Cell, Partial Pressure
Document Summary
Muscles create force & move levers about fulcrums. Coordinated movement requires sensory feedback: particularly kinesthetic feedback. Besides neural drive, muscles also need energy in order to contract. Arteries carry oxygenated blood except the pulmonary artery. All arteries carry blood away from the heart. All veins carry deoxygenated blood except the pulmonary vein. All veins carry blood back to the heart. Heavy endurance training: 50% of blood goes to liver and kidney, 15% of blood to muscles, 80% of blood to muscle. Diastolic pressure 80 mmhg: less than or equal to 200 mmhg at peak exercise, changes little during exercise. Formed elements - 45%: mainly red blood cells (~99%) (erythrocytes, hemoglobin (found in red blood cells) In 1 litre of blood, hemoglobin stores 200 ml o2. Partial pressure: pressure exerted by a single gas in a mixture of gasses: ex. Decides the amount of o2 carried by the blood (> po2 = > o2 carried)
