Biology 101 - module 3 (A+ Graded 100% Verified)
This is around the cell plasma membrane
This is the "fence with gates" lipid bilayer with proteins
Only certain substances can pass through the wall. What substances? Carbon dioxide, oxygen, and water
What is diffusion? ...
Biology 101 - module 3 (A+ Graded 100% Verified) This is around the cell plasma membrane This is the "fence with gates" lipid bilayer with proteins Only certain substances can pass through the wall. What substances? Carbon dioxide, oxygen, and water What is diffusion? movement of molecules fro m high to low concentration areas Molecules are _______ly distributed throughout the medium evenly Molecules that CAN diffuse across the membrane O2, CO2, water and other small molecules Molecules that CANNOT diffuse across the membrane Gluc ose, ions, calcium and sodium Passive transport with the flow of protein gates, ferries Active transport against the flow of protein gates, requires energy Endocytosis portion of cell membrane engulfs particles Exocytosis portion of cel l membrane releases particles Osmosis diffusion of water molecules High solute concentration INSIDE cell water moves IN (cell expands) High solute concentration OUTSIDE cell water moves OUT (cell shrinks) Same solute concentration on both sides no movement What sort of activities are cells involved in? making proteins building membranes taking in materials metabolism photosynthesis respiration chemical reactions Different forms of energy (4) m echanical chemical electrical heat 2 states of energy kinetic (motion) potential (stored) ______ can transform from one form to another energy Laws of thermodynamics 1. Energy is always lost during transformation 2. Systems naturally go from order to disorder _________ must maintain a high state of order which requires an input of energy living things small energy packets ATP in general, a chemical reaction involves reactants which interact to form _________________ new products (new molecules) energy releasing reactions exergonic (spontaneous, lower energy) energy requiring reactions endergonic (NOT spontaneous, higher energy) biological reactions coupling in some reactions, _____________ get transfer red electrons excited electrons give off __________ with each transfer energy activation energy can be overcome by ______, __________, _______ heat, pressure and catalysts Role of an ________ is lowering activation energy enzyme enzymes used in metabolic pathways sequence of chemical reactions, each step helped by a unique enzyme photosynthesis plants capture sunlight energy, release oxygen
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 EXCELLENTSTUDIES01. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $8.29. You're not tied to anything after your purchase.
