Biology 311C Lecture 15 - September 28, 2011 Biology 311C...

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

View Full Document Right Arrow Icon
September 28, 2011 Biology 311C Lecture 15 More phospholipids with saturated hydrocarbon chains will decrease fluidity at lower temperatures. When you have more saturated HC carbons they pack together more. More phospholipids with very long hydrocarbon chains would decrease fluidity because if we shorten the chains, it increases. The longer the chains, the more tightly compact they are and they are more solid. There is more contact between the tails making it stronger. Adding cholesterol would increase fluidity at low temperatures and at high temperatures, it doesn’t let the membranes flex. Cholesterol is a fluidity buffer. For osmosis to occur there has to be a permeable membrane and two different concentrations on each side. It goes from low to high. The solutes move, water doesn’t. An isotonic solution has no net water movement. You have molecules moving, but they are moving in and out equally. In a hypertonic solution, there is net water movement out of the cell. We have a lot of
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 / 2

Biology 311C Lecture 15 - September 28, 2011 Biology 311C...

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