BIL 150 Chapter 7 and 11: Membranes and Cell Communication || WELL-ENLIGHTENED
7 views 0 purchase
Course
BIL 150
Institution
BIL 150
Types of Membrane Transport correct answers 1. *Passive transport* of small molecules that doesn't require energy; it may involve transport proteins; with the gradient
2. *Active transport* of small molecules requires energy and a transport protein; against the gradient
3. *Bulk transport* mo...
BIL 150 Chapter 7 and 11: Membranes and Cell
Communication || WELL-ENLIGHTENED
Types of Membrane Transport correct answers 1. *Passive transport* of small molecules that
doesn't require energy; it may involve transport proteins; with the gradient
2. *Active transport* of small molecules requires energy and a transport protein; against the
gradient
3. *Bulk transport* moves large molecules; includes *exocytosis* (large molecules are
secreted when a vesicle fuses with the plasma membrane) and *endocytosis* (large
molecules are taken in when the plasma membrane pinches inward, forming a vesicle)
Fluid mosaic model correct answers Structural model of the plasma membrane where
molecules are free to move sideways within a lipid bilayer; depicts the membrane as a mosaic
of protein molecules bobbing in a fluid bilayer of phospholipids
Passive transport correct answers -Requires NO energy,
-Movement of molecules from high to low concentration,
-Moves with the concentration gradient
Active transport correct answers 1. Energy-requiring process that moves material across a
cell membrane against a concentration difference
2. The energy is in the form of ATP hydrolysis
3. All proteins involved are *carrier proteins*
4. Enables cells to maintain solute concentrations that differ from the environment
Bulk transport correct answers The process by which large particles and macromolecules are
transported through plasma membranes; *exocytosis and endocytosis*
Exocytosis correct answers A process by which the contents of a cell vacuole are released to
the exterior through fusion of the vacuole membrane with the cell membrane.
Endocytosis correct answers A process in which a cell engulfs extracellular material through
an inward folding of its plasma membrane.
What determine the functions of a membrane? correct answers The proteins embedded in it;
every cell has a different composition of proteins
Peripheral proteins correct answers The proteins of a membrane that are not embedded in the
lipid bilayer; they are appendages loosely bound to the *surface of the membrane*
Integral proteins correct answers Penetrate the hydrophobic interior of the lipid bilayer
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 EFT, 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 this summary from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller ProPerfomer. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy this summary for R186,14. You're not tied to anything after your purchase.
