Lecture 25-26 Blood&gas exchange

Lecture 25-26 Blood&gas exchange - Blood...

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Blood: Circulation and Gas Exchange
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Right atrium Right ventricle Posterior vena cava Capillaries of abdominal organs and hind limbs Aorta Left ventricle Left atrium Pulmonary vein Pulmonary artery Capillaries of left lung Capillaries of head and forelimbs Anterior vena cava Pulmonary artery Capillaries of right lung Pulmonary vein Aorta 1 10 11 5 4 6 2 9 3 3 7 8   The mammalian cardiovascular system: an overview
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  The mammalian heart: a closer look Aorta Pulmonary artery Left atrium Pulmonary veins Semilunar valve Atrioventricular valve Left ventricle Right ventricle Anterior vena cava Pulmonary artery Semilunar valve Atrioventricular valve Posterior vena cava Pulmonary veins Right atrium
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Artery Vein 100 µm Artery Vein Arteriole Venule Connective tissue Smooth muscle Endothelium Connective tissue Smooth muscle Endothelium Valve Endothelium Basement membrane Capillary The structure of blood vessels
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  Blood flow in capillary beds Precapillary sphincters Thoroughfare channel Arteriole Capillaries Venule (a) Sphincters relaxed (b) Sphincters contracted Venule Arteriole (c) Capillaries and larger vessels (SEM) 20 μ m
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  Fluid exchange between capillaries and the interstitial fluid At the arterial end of a capillary, blood pressure is greater than osmotic pressure, and fluid flows out of the capillary into the interstitial fluid. Capillary Red blood cell 15 μ m Tissue cell INTERSTITIAL FLUID Capillary Net fluid movement out Net fluid movement in Direction of blood flow Blood pressure Osmotic pressure Inward flow Outward flow Pressure Arterial end of capillary Venule end At the venule end of a capillary, blood pressure is less than osmotic pressure, and fluid flows from the interstitial fluid into the capillary.
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Ethylene glycol tetraacetic acid (EGTA) is a chelating agent that binds to Ca 2+ . What effect would injecting EGTA at a synaptic terminal have on the transmission of an action potential to a post-synaptic neuron? A. The release of neurotransmitters by the presynaptic
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Lecture 25-26 Blood&gas exchange - Blood...

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