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

View Full Document Right Arrow Icon
MEMBRANES AND OSMOSIS Membrane Structure o Barrier to keep things in place inside the cell o Membranes form when phospholipids are present o 1 phospholipid has two tails with one head o Glycoprotein and glycolipids are on the surface of the cell and helps to provide recognition o Cholesterol makes membranes more fluid so they are not stiff. Allows bending of membranes o Matrix- fills up space in our cells around bones, is hard, around cheeks is soft o Move signals from outside to inside of cell-> messenger molecule stays outside of cell and binds to a specific receptor. Message gets into cell. Steroids are lipid soluble and can enter o Mitochondria are good for ATP formation Passive Transport/Active Trasport/Osmosis o Differential permutation- large molecules cannot get through membranes, medium can sometimes, small molecules get through membrane easily. Molecules evenly distributed o Facilitated diffusion-membranes recognize molecules and can move molecules in and out easily. (requires protein) molecules evenly distributed.
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


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