Class Notes (809,509)
Canada (493,754)
Physiology (634)
PSL201Y1 (124)

Lecture 1: Cell membrane and transport mechanisms A summary of the lecture about cell membranes, their properties, and descriptions of transport mechanisms in the cell membrane.

1 Page
Unlock Document

University of Toronto St. George
Anthony Lam

Physiology Lecture 1 Cell membraneMade of a dilipid layer with proteins and channels in it to allow the movements of chemicals Allows diffusion of gases and lipidsoluble moleculeso Lipids have a phosphate head and two fatty acid tails Straight tail for strength bent tail for flexibility Head is hydrophilic tails are hydrophobico Membrane stabilized by cholesterol Membrane proteins are structural support for the cytoskeleton Go through membrane and allow for channels and can also act as receptors to signal molecules The proteins crisscross the membranes like a needle and thread On one end is NH2 on the other COOH Glycocalyx is a matrix of carbohydrate filaments in the extracellular space anchored to the proteins glycoproteins or lipids glycolipids They slow diffusion and contain a net negative charge attracting positive ions calcium in particular Channels are combinations of proteins to allow nonmembrane permeable molecules in and out of the cell Parts of it dangle in the cell forming pore loops These act as a filter allowing only certain kinds of molecules through o An example of one is an Aquapo
More Less

Related notes for PSL201Y1

Log In


Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.