Problem Set 4 KEY - Problem Set 5 Page 1 of 3 Problem Set 4...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Problem Set 4 1) Draw the following structures: 2) Membrane lipids from 4.74*10 9 erythrocytes form a monolayer of 0.89 m 2 in water. The surface area of an average erythrocyte is ~ 100 μ m 2 . Show that the membrane is a bilayer. The surface are of this many erythrocytes works out to: This is approximately ½ the measured area, implying that the membrane of each erythrocyte must contain two layers of lipid. 3) How many moles of K + will diffuse across the erythrocyte membrane in one minute under the following conditions: [K + ] in = 100 mM [K + ] out = 15 mM Surface Area of erythrocyte: 100 μ m 2 = 100*10 -12 m 2 Permeability P of K + = 2.4*10 -10 cm-sec -1 Put everything in terms of centimeters (i.e. convert mols/liter to mols/cm 3 , m 2 to cm 2 , etc.) 4) If the erythrocyte volume is 100 μ m 3 , what percent of the internal K + willl leak out in 1 minute? cis -9-docenoic acid 18:1c 11 Saturated FA w/ Tm < 30oC (any saturated FA with 9 or fewer carbons) 9 12 2 1 2 4.74 10 100 10 0.474
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 3

Problem Set 4 KEY - Problem Set 5 Page 1 of 3 Problem Set 4...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online