Bio2 Lecture 17

Bio2 Lecture 17 - Bio2 Lecture 17 3/24/05 Exam II review...

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Bio2 Lecture 17 3/24/05 Exam II review April 3 (Sunday) 2-4 pm Hickman? 1) A track coach wanted to determine which of her athletes best suited to run long distances (marathons) She had each athlete’s thigh muscle examined at the fiber level. She chose the athletes that had… ans: slow twitch, red and white 80% red fibers and 20% white fibers Capillaries - When you get cut, you are cutting capillaries - Capillaries are in contact with all of your cells - Nutrients, oxygen are taken in from blood, and waste is given to blood in capillaries - Blood at high pressure (hydrostatic pressure) is pushing against the vessels - Osmosis, osmotic pressure is also present, oxygen, nutrients, hormones, small molecules are pushed out into, filtrated out into surrounding tissue cells, and because of hydrostatic pressure will cause more things to diffuse out, but then there is a very low osmotic pressure so you interstitial fluid going in - From arterial end, blood pressure is +40, osmotic pressure of interstitial fluid is +3, so diffusion out, osmotic pressure of plasma is -28, net filtration is (40 + 3) - 28 = +15, then it travels a bit and blood pressure is now +15, and osmotic pressure of plasma is -28, while osmotic pressure of interstitial fluid stays at +3, net absorption is (15 + 3) – 28 = -10 then the capillary goes to vein Lymphatic system - When blood is filtered out it loses nutrients and volume, even a 1% loss, if it didn’t have a way to make up the 1% loss, the system would not work - How does it get back its 1% volume? By lymphatic system - Three functions - 1. Collects and returns interstitial fluid to blood (returns the 1% that it needs) - 2. Absorb lipids from Dig. Tract, lipids came into circulatory system first from lymphatic system, had to be packaged as chylomicrons, this way it was able to enter lymphatic system, and then it can enter into blood - 3. Defend against disease - One character of lymphatic system is that it only has one way, have tonsils, spleen, it’s a one way system, therefore it is a vein no arteries - Find how veins and capillaries interact to uptake the 1% loss Cardiovascular Disease - Heart attack from plaque build up
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This note was uploaded on 08/10/2009 for the course BIO 102 taught by Professor Brey during the Spring '08 term at Rutgers.

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Bio2 Lecture 17 - Bio2 Lecture 17 3/24/05 Exam II review...

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