Textbook Notes (368,318)
Canada (161,798)
Psychology (3,337)
PSYC 2410 (149)

Excitable Membranes and Action Potentials.docx

16 Pages
Unlock Document

PSYC 2410
Elena Choleris

Cell Membrane 1082012 63000 PM Cell MembraneSemipermeable barrier selective to materials crossingComposed of phospholipids o Polar head glycerolphosphateHydrophilic water loving goes towards water o Two non polar fatty acid tailsHydrophobic waterhating avoid water o Will spontaneously form a circle when phospholipids individually exposed to waterLipidsPhospholipid bilayerNonpolar areas form a hydrophobic region between the hydrophilic heads not aqueous environmentIntracellular space INaqueous cytosolExtracellular space OUTaqueous cytosolAt body temperatures the interior of the bilayer is fluid o Need other molecules that gives cell membrane rigidity maintain structure and shape while at same time being fluidCholesterol structure similar to phospholipids o Glycolipidsmodified versions of phospholipidsHas sugar molecules on heads ProteinsTransmembrane of integral proteins o Have hydrophobic and hydrophilic regions o Signal proteinsFolded number of times in cell membraneInvolved in signaling processescommunication in cells o Channel proteinsForm channelsCan be open or closed allow or prevent flow of different substances o Go across entire membranePeripheral membrane proteins nontransmembrane proteins o Extracellular or intracellular side of transmembrane proteins o They facilitate chemical reactions usually enzymes opening or closing of channel proteinsCatalysto Can help the functions of transmembrane proteins interact functionally with them
More Less

Related notes for PSYC 2410

Log In


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.