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Plasma Membrane Test

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1.
How many phospholipid bi-layers surround the mitochondria (describe)
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2.
What does it mean when something "moves against it's gradient"?
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3.
What are the two ways in which molecules can pass through a membrane?
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4.
What is a phospholipid bi-layer?
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5.
What is a protein called that spans across the entire phospholipid bilayer plasma membrane?
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6.
What is active transport?
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7.
What does it mean when something "moves along it's gradient"?
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8.
What is the name of the arrangement of the phospholipids and proteins within the plasma membrane?
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9.
How many phospholipid bi-layers surround the nucleus (describe)
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10.
What is the most popular protein receptor in the plasma membrane that uses Active Transport?
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11.
How can the rate of a molecules diffusion into the cell be measured?
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12.
Does Active Transport require energy and why or why not?
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13.
Does Facilitated Transport require energy and why or why not?
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14.
What are the two types of carrier mediated transport systems?
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15.
Name which of the following that exhibits saturation kinetics: Active Transport or Facilitated Transport
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16.
What is facilitated transport?
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17.
What is the difference between facilitated transport and active transport?
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18.
What does a cells plasma membrane consist of?
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19.
If a graph of the gradient vs the rate of a molecule to cross a membrane reaches a point where increasing the gradient no longer increases the rate of crossing, what does this signify?
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20.
Summarize the process of phagocytosis.
A.
The Fluid Mosaic Model (referring to the fact that the phospholipids move about freely along the membrane in a fluid like fashion and the proteins are fixed with limited mobility, creating an intuitive image similar to a mosaic)
B.
A phospholipid bi-layer refers to a phosphate anion head which is polar/hydrophilic and 2 lipid tails which are non-polar/hydrophobic
C.
To move along the gradient is to move from high concentration to low concentration
D.
Both
E.
Facilitated transport refers to the case where there is something assisting a molecule to cross the membrane along it's gradient (from high concentration to low concentration)
F.
Active Transport and Facilitated Transport
G.
This signifies that the molecule is crossing via facilitated transport because there is a limiting factor in the form of something such as a protein/receptor
H.
No, Facilitated Transport does not require energy because it goes along with the natural flow particles along their gradient
I.
By comparing it to changes in that molecules gradient (gradient referring to the differences in concentrations on both sides of the membrane)
J.
A phospholipid bi-layer with proteins embedded throughout
K.
Sodium Potassium ATPase pump
L.
Facilitated transport refers to the assisting of a molecule to cross a membrane along it's gradient while active transport refers to the assisting of a molecule to cross a membrane against it's gradient
M.
2: The inner membrane is arranged in shelf-like folds referred to as cristae
N.
2: These two membranes have pores in them called nuclear pores
O.
An intrinsic protein or an integral protein
P.
The cell eats something (usually a pathogen/bacteria), the thing eaten is then inside the cell surrounded by a small membrane bubble which is then fused with lysosomes that release their contents and digest everything in the bubble making a phagolysosome
Q.
Yes, Active Transport requires energy (ATP) because it opposes the natural flow of particles along their gradient
R.
Active transport refers to the case where there is something assisting a molecule to cross the membrane against it's gradient (from low concentration to high concentration)
S.
Diffusion or facilitated transport
T.
To move against the gradient is to move from low concentration to high concentration
Type the Answer that corresponds to the displayed Question.
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21.
Is a cells plasma membrane permeable or semipermeable?
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22.
What kind of particles can easily pass through a cells plasma membrane?
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23.
Endocytosis is when the plasma membrane invaginates and breaks off in a fashion that allows things to enter the cell ("cytosis" can be remembered as "cell eating")
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24.
Exocytosis is when the plasma membrane invaginates and breaks off in a fashion that allows things to exit the cell ("cytosis" can be remembered as "cell eating")
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25.
Phagocytosis is a special case of endocytosis which mainly occurs when white blood cells want to remove pathogens, bacteria, or debris

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