Class notes
Cell Membranes (Biomedical Science)
- Course
- Institution
- Book
This document provides a detailed exploration of cell membranes, covering their structure, composition, and the dynamic roles they play in cellular function.
[Show more]
Connected book
Book Title:
Author(s):
- Edition:
- ISBN:
- Edition:
More summaries for
-
COMPLETE TEST BANK FOR Molecular Biology of the Cell (Seventh Edition) 7th Edition Kindle Edition by Bruce Alberts , Rebecca Heald Alexander Johnson || LATEST EDITION {2024 -2025}
-
TESTBANK FOR MOLECULAR BIOLOGY OF THE CELL 7TH EDITION/COMPLETE GUIDE 2024-2025
-
Samenvatting H2 en H3 Molecular Biology of the Cell (Seventh Edition) - Molecular Biology of the Cell 1 (WBFA006-04)
Seller
Follow
ame03
Content preview
Cells To Systems - Cell MembranesCell Membranes
Membranes:
Acts as a barrier
Enclose a reaction compartment
Maintain concentration gradients (certain molecules have to be outside or inside the cell)
Determines what enters and leaves the compartment
Provides an interaction surface with the environment e.g mitochondrial inner membrane has a large surface
area and costs enzymes that are necessary for energy production
Barrier In Aqueous Environment:
2 Types Of Molecules:
1. Hydrophilic - Water loving, interaction with water is thermodynamically favourable
2. Hydrophobic - Water hating, apolar molecules unable to interact with water
Water is composed of 1 oxygen and 2 hydrogen atoms
Oxygen draws electrons with more force towards oxygen atoms
Apolar - Molecules that do not have a
Water Molecule: permanent dipole moment and are not
attracted to charged/polar molecules
Overall charge is neutral
The distribution charge has some polarity because oxygen draws electrons closer (becomes a strong dipole
Apolar molecule e.g hexane has no charge distribution and is evenly distributed
= because of this, water and hexane do not interact with each other
Aqueous Solubility:
Charged or polar molecules are highly soluble through interactions with water dipole
Apolar molecules are highly insoluble as there are no interaction with the water dipole
Because of this charge distribution in water However, this is not possible with
molecules, there is no negative or positive side inorganic/apolar molecules.
Water molecules are able to produce hydrogen bonds Not able to form these interactions
and interact with other polar/charged molecules = repel each other
= able to diffuse in water
Comportment Of Amphiphatic Molecules: Amphiphilic/Amphiphatic - A
molecule having both
Phase separation is observed due to insolubility of water in hexane (vice versa) hydrophilic and hydrophobic
Surfactants/detergents are amphiphilic molecules (contain polar & non-polar parts) parts
Amphiphatic molecules orientate themselves at the interphase between organic and water phase
1
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller ame03. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.62. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
79223 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now