L41 BIOL 3110 Lecture 4: Lecture 4
5 Mar 2017
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Movement of blood through the heart and blood vessels. Frictionless pistons with liquid or gas in a cylinder. Pressure from the left and pressure from the right. In a u shaped tube with hg in it. Pressure applied to left side, so left side height goes down and right side height increases. The difference in height between the right and left sides in mm is a pressure unit (mmhg = torr). At 2am: permeable to small molecules and h2o only when |p_l| > |p_r| L, 0. 5 s, 0. 5 h2o | 1. 5 h2o, 0. 5s. U tube with a membrane in the center. Weight of the height of water between the right and left size = magnitude of the osmotic pressure. At 4 am: apply pressure the right side. Water moves to the left, decreasing the height of water between the right and left size, amount of change depends on magnitude of pressure.
