Blood Review

Blood Review - Composition of Blood Blood is a connective...

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Composition of Blood Blood is a connective tissue consisting of scattered cells in a matrix that suspends the, 55% plasma, 45% cellular elements Plasma: water, ions (Na, Cl, K, Ca, Mg, HCO3, H, with [Na and Cl] as most abundant), proteins, nutrients, wastes, oxygen, carbon dioxide o Albumin, a protein in plasma, exerts osmotic pressure for capillary re-absorption, binding to a number of hydrophobic hormones to prevent them from separating out from the water phase o Presence of calcium in plasma suppresses activity of nerve and muscle cells o Concentration of calcium and hydrogen ions have to be maintained within a certain range o Generation of action potential in the heart is suppressed by calcium, slightly elevated levels of calcium can cause decreased nervous activity that can cause a coma, heart rate slows down Conversely, decreasing calcium can cause hyper-excitability, seizures/blackouts/memory loss in the brain, high heart rate pH of plasma ~7.4 o conformation of proteins depends strongly on pH o Systems that buffer blood pH NaHCO3 buffer [most rapid, lowest capacity] Respiratory system as a whole adjusts pH of blood
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This note was uploaded on 09/28/2010 for the course BISC 220 taught by Professor Mcclure during the Spring '09 term at USC.

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Blood Review - Composition of Blood Blood is a connective...

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