New User Special Price Expires in

Let's log you in.

Sign in with Facebook


Don't have a StudySoup account? Create one here!


Create a StudySoup account

Be part of our community, it's free to join!

Sign up with Facebook


Create your account
By creating an account you agree to StudySoup's terms and conditions and privacy policy

Already have a StudySoup account? Login here

Life 102, Ch. 7 notes

by: Bridget Kelly

Life 102, Ch. 7 notes Life 102

Bridget Kelly
GPA 4.0

Preview These Notes for FREE

Get a free preview of these Notes, just enter your email below.

Unlock Preview
Unlock Preview

Preview these materials now for free

Why put in your email? Get access to more of this material and other relevant free materials for your school

View Preview

About this Document

Typed, color coated and includes pictures
Attributes of Living Systems
Jennifer Neuwald and Tanya Dewey
Class Notes
25 ?




Popular in Attributes of Living Systems

Popular in Animal Science

This 5 page Class Notes was uploaded by Bridget Kelly on Thursday September 29, 2016. The Class Notes belongs to Life 102 at Colorado State University taught by Jennifer Neuwald and Tanya Dewey in Fall 2016. Since its upload, it has received 12 views. For similar materials see Attributes of Living Systems in Animal Science at Colorado State University.


Reviews for Life 102, Ch. 7 notes


Report this Material


What is Karma?


Karma is the currency of StudySoup.

You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!

Date Created: 09/29/16
Wednesday, September 21, 2016 Membrane Structure and Function Chapter 7 Membranes - boundary layers of cells, and organelle inside cells Selective Permeability - some things can pass, others cannot Phospholipid Bilayer • Hydrophilic head • Hydrophobic tail - Proteins • amino groups + carboxyl group • hydrophobic and hydrophilic regions of proteins - Fluid - membrane components are not stationary - Mosaic - Phospholipids, proteins, and other macromolecule • Fluid Mosaic Model What makes membranes fluid? 1. Temperature - Warm Temp = fluid - Cool Temp = viscous 1 Wednesday, September 21, 2016 - Example: Bacon grease when hot = fluid and when cool = solid/viscous 2. Fatty Acid Tails - Unsaturated V.S Saturated hydrocarbon tails - fluid V.S viscous - Example: winter wheat can be farmed in the winter because it goes from saturated to unsaturated to balance out the cold weather. 3. Cholesterol - Amphipathic - maintains membrane fluidity • balances membrane when temp. changes Membrane Structure and Function (Proteins determine membrane function) - two types of membrane proteins 1. Integral (most are transmembrane) 2. Peripheral - Selective Permeability • Transit Proteins - regulate and facilitate movement of things into and out of the cell How to get through the cell membrane? • 1. Phospholipid bilayer - non polar molecules 2. Transport proteins - polar molecules - Concentration Gradient - how concentration of solutes change among areas • Passive transport - diffusion - solute moving 2 Wednesday, September 21, 2016 - no energy cause, high Low • Active transport - requires energy cause, Low High • Osmosis - solvent moving • Isotonic Solution - equal concentration inside and outside of cell - Normal for animals - Flaccid for plants • Hypotonic Solution - concentration inside much higher than outside the cell - water goes into the cell - Lysed for animals - Normal for plants • Hypertonic Solution - concentration inside much less than outside the cell - water goes out of the cell - Shriveled for animals - Plasmolyzed for plants Facilitated Diffusion -Don’t require energy -Specificity -Diversity 1. Channel Proteins - hydrophilic core/tunnel 2. Carrier Proteins 3 Wednesday, September 21, 2016 Active Transport -Energy needed - up concentration gradient - carrier proteins - powered by ATP - Na+/K+ pump • Na+ = high outside, low inside • K+ = low outside, high inside 1. Pump grabs Na+ 2. Cell pays - cost = phosphate group - payment = ATP 3. Pump folds and splits out Na+ 4. Pump grabs K+, drops P 5. Pump folds back 6. Pump spits “in” K+ - Unequal transport rates…lead to MEMBRANE POTENTIAL (voltage across membrane) - What else experiences electrical forces? • Ions Electrochemical Gradient 1. Concentration gradient 2. Membrane potencial Proton Pump -Uses ATP - pumps against concentration gradient 4 Wednesday, September 21, 2016 - established a membrane potential - cotransport protein -doesn’t use ATP • cotransports sucrose as well as H+ • sucrose goes through with H+ to save energy Vesicle - mediated transport • Exocytosis - stuff existing the cell Endocytosis - stuff entering the cell • - Phagocytosis - brings food into the cell - Pinocytosis - brings fluid into the cell - Receptor-mediated endocytosis - brings specific molecule into the cell Glycoproteins - cellular ID’s Glycolipids - cellular ID’s 5


Buy Material

Are you sure you want to buy this material for

25 Karma

Buy Material

BOOM! Enjoy Your Free Notes!

We've added these Notes to your profile, click here to view them now.


You're already Subscribed!

Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'

Why people love StudySoup

Bentley McCaw University of Florida

"I was shooting for a perfect 4.0 GPA this semester. Having StudySoup as a study aid was critical to helping me achieve my goal...and I nailed it!"

Allison Fischer University of Alabama

"I signed up to be an Elite Notetaker with 2 of my sorority sisters this semester. We just posted our notes weekly and were each making over $600 per month. I LOVE StudySoup!"

Jim McGreen Ohio University

"Knowing I can count on the Elite Notetaker in my class allows me to focus on what the professor is saying instead of just scribbling notes the whole time and falling behind."


"Their 'Elite Notetakers' are making over $1,200/month in sales by creating high quality content that helps their classmates in a time of need."

Become an Elite Notetaker and start selling your notes online!

Refund Policy


All subscriptions to StudySoup are paid in full at the time of subscribing. To change your credit card information or to cancel your subscription, go to "Edit Settings". All credit card information will be available there. If you should decide to cancel your subscription, it will continue to be valid until the next payment period, as all payments for the current period were made in advance. For special circumstances, please email


StudySoup has more than 1 million course-specific study resources to help students study smarter. If you’re having trouble finding what you’re looking for, our customer support team can help you find what you need! Feel free to contact them here:

Recurring Subscriptions: If you have canceled your recurring subscription on the day of renewal and have not downloaded any documents, you may request a refund by submitting an email to

Satisfaction Guarantee: If you’re not satisfied with your subscription, you can contact us for further help. Contact must be made within 3 business days of your subscription purchase and your refund request will be subject for review.

Please Note: Refunds can never be provided more than 30 days after the initial purchase date regardless of your activity on the site.