CHAPTER 5: MEMBRANES Flashcards
1
Q
What are the components of the biological membrane?
A
- Phospholipids in a bilayer
- transmembrane Proteins
- interior protein network
- cell surface markers
2
Q
Types of membrane-bound proteins
A
- transporters
- cell surface receptors
- cell surface identity markers
- enzymes
- cell to cell adhesion
- attachments to cytoskeleton
3
Q
Passive Transport
A
- does not require energy
- uses diffusion
4
Q
Active Transport
A
- requires ATP energy
- low to high concentration
- requires highly selective carrier proteins
- uniporter
- symporter
- antiporter
5
Q
What is the fluid mosaic model?
A
there are a lot of particles in a cell, but they are fluid and can move
6
Q
What is coupled transport?
A
- uses ATP indirectly
- uses diffusion of one molecule to supply active energy for the other molecule
7
Q
What is bulk transport?
A
large groups moving across a membrane
- phagocytosis: a big particle
- pinocytosis: a bunch of smaller particles at once
8
Q
what does Hypertonic indicate?
A
hyper = higher
9
Q
what does Hypotonic indicate?
A
hypo = lower
10
Q
define phagocytosis
A
one big particle
11
Q
define pinocytosis
A
smaller molecule, larger quantities
