Jeopardy Cell Membrane Chapter 5 Jordyn Gardner
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Transcript of Jeopardy Cell Membrane Chapter 5 Jordyn Gardner
JEOPARDYCELL MEMBRANE
CHAPTER 5JORDYN GARDNER
Membrane
structure and
function
Membrane
Proteins
Diffusion Osmosis Exocytosis and
endocytosis
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Lipid bilayer
What is the Structural basis of cell membranes?
Fluid Mosaic Model
By this model, a cell membrane has a mixed composition of phospholipids, glycolipids, sterols, and
proteins. What is it?
2, lipids, and phospholipids
A cell membrane includes ___ layers composed mainly of ________& _________.
True
True or False: Many different proteins having different functions are embedded in the membrane or
positioned at its surfaces?
A phosphate-containing head and two fatty acid tails attached to a
glycerol backbone.
What makes up a phospholipid ?
-Serves as a boundary between the outside environment and the inside of the cell
-gives form and shape to cells- Can connect on cell to two or more adjacent
cells- -helps vesicles form
- (other answers may be acceptable)
What does the cell membrane do?
Adhesion proteins
What helps cells of the same type locate, stick together, and remain in the same proper tissues?
Communication Proteins
These from channels that match up across the plasma membranes of two cells; they let signals and substances
flow rapidly between their cytoplasm
Receptor Proteins
These bind extracellular substances, such a s hormones, that trigger changes in cell activities
Recognition Proteins
Like molecular fingerprints, they identify each cell as belonging to a particular tissue or individual.
Transport Proteins
These passively let solutes cross the membrane through their interior or they actively pump them
through.
Diffusion
The name for the net movement of like molecules or ions down a concentration gradient.
It has selective permeability
What does it mean when its molecular structure lets some substances but no others cross it in certain ways,
at certain times?
Down
Does diffusion go up or down a concentration gradient?
Yes
Is a concentration gradient a form of energy?
The gradient’s steepness, molecular size, temperature, and electric or pressure gradients that may be
present.
What factors influence the rates of movement down a concentration gradient?
Osmosis
When water molecules diffuse down the water concentration gradient and thus cross that membrane
what occurs?
hypotonic
Which tonicity is the one with fewer solutes?
hypertonic
What tonicity has more solutes?
Isotonic
This solution has the same amount of solutes.
Osmotic pressure
The amount of force preventing further increase in a solution’s volume?
Exocytosis
What is it called when a vesicle moves to the cell surface, and the protein-studded lipid bilayer of its
membrane fuses with the plasma membrane?
endocytosis
When a cell takes in substances near its surface it is?
Cell eating
Phagocytosis is another word for..?
yes
Do Exocytosis, and endocytosis continually replace and withdraw patches of its plasma membrane?
Move large packets of materials across a plasma
membrane.
Overall what does Exocytosis and endocytosis do?