Textbook notes-Chapter 5 Membrane_Dynamics

3 Pages
76 Views

Department
Biological Sciences
Course Code
BIOD27H3
Professor
Ingrid L.Stefanovic

This preview shows page 1. Sign up to view the full 3 pages of the document.
Description
Chapter 5 Membrane Dynamics BGYB30 Because of the free movement of water, the extracellular and intracellular compartments can reach a state of osmotic equilibrium, in which the total amount of solute per volume of fluid is equal on the two sides of the cell membrane. At the same time, however, the body is in a state of chemical disequilibrium, in which the major solutes are more concentrated in one of the two body compartments than in the other. Example: + - - -> Na , Cl and HCO a3e more concentrated in extracelullar fluid than in intracellular fluid. -> Whereas, K are more concentrated inside the cell. 2+ 2+ -> Ca is more concentrated in the extracelullar fluid than in the cytosol, although many cells store Ca inside organelles such as the endoplasmic reticulum and mitochondria. - The inside of the cell is slightly negative relative to the extracelullar fluid. - Homeostasis is not the same as equilibrium. The intracellular and extracelullar compartments of the body may be in osmotic equilibrium, but they are also in chemical and electrical disequilibrium. * @Z]L oooo] L]Z]L2]ZZ}KZ oooo]Z [ZZ]2Z }L L]}L + + - of K ion and low concentration of Na , and Cl ions. Diffusion: - Cell membranes are selectively permeable; the lipid and protei
More Less
Unlock Document

Only page 1 are available for preview. Some parts have been intentionally blurred.

Unlock Document
You're Reading a Preview

Unlock to view full version

Unlock Document

Log In


OR

Join OneClass

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

Sign up

Join to view


OR

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.


Submit