Chapter 5 - Plasma Membrane Flashcards
All living organisms have cells surrounded by _________________ * KNOW THIS!
Cell membranes
What are the parts of plasma membrane?
Phospholipid bilayer and proteins
What is: moving cells from higher to lower concentration - that are NOT water (H2O)?
Diffusion
What is: moving cells from higher concentration to lower concentration but NEEDS PROTEIN?
Facillitated diffusion
What is diffusion of water - moving from higher concentration to lower?
Osmosis
What is the ability of a solution to cause a cell to gain or lose water through osmosis?
Tonicity
More water - H2O - less tonicity
Hypotonic
Less water - H2O - more tonicity
Hypertonic
Equal water - H2O - no movement
Isotonic
What makes osmosis different in plant vs. animal cells?
Plant cells - presence of rigid cell wall in plants which prevent them from bursting when they gain water through osmosis
Animal cells - don’t have cell wall - lots of change in shape of its cells - lack this cell and can easily rupture if gain too much water (hypotonic)
What does “fluid mosaic” mean?
Fluid - moving around
Mosaic - lot of protein
There is a head and a tail in the __________
Phospholipid Bilayer
The head in the phospholipid bilayer
Hydrophilic
The tail in the phospholipid bilayer
Hydrophobic
How we get things in and out of cells:
Transport proteins
What is a fluid mosaic of different types of macromolecules?
Plasma Membrane
What form the plasma membrane’s foundation?
Phospholipids
Hydrophobic head
hydrophilic tail
What are the components of a membrane?
Phospholipids, protein and cholesterol
How does water move?
Osmosis
What is moving cells from higher concentration to lower concentration?
Diffusion
What is moving cells from higher concentration to lower concentration - but needs protein?
Facilitated Diffusion
Active transport requires _____
Energy
Is there ONE or MANY type of transport proteins?
MANY
Compare passive transport and active transport.
Active transport requires energy
Passive transport does not
2 types of bulk transport
Endocytosis
Exocytosis
Endocytosis
Moves IN
Requires energy
Exocytosis
Moves OUT
