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Cell Membranes & Cell Transport
Cell Membranes & Cell Transport
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Covers the basics about cell membranes and cell transport #biology #cellmembranes #celltransport
Flashcards
22 cards
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Practice quiz
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Questions
22
Answers
1
The basic structure of the cell membrane is
a phospholipid bilayer.
impermeable.
a liquid bilayer.
made of proteins.
2
What is concentration?
the amount of mass something has
amount of molecules in a given area
the density of a substance
the weight of a substance
3
The stuff that does the dissolving is the __________.
solute
solution
suspension
solvent
4
Water enters, cell swells; lower solute concentration outside the cell than inside = __solution
hypotonic
hypertonic
isotonic
hydroponic
5
Water leaves, cell shrinks; higher solute concentration outside cell than inside = ? solution
hydroponic
hypotonic
isotonic
hypertonic
6
Requires energy; materials enter pockets in cell membrane, then forms vacuole in cytoplasm = ?
phagocytosis
pinocytosis
exocytosis
endocytosis
7
"A" is
a hydrophobic fatty acid "tail"
cholesterol
a protein
a hydrophilic phosphate "head"
8
What kind of solution is the red blood cell on the left in?
isotonic
hypertonic
hypotonic
hydroponic
9
What molecules are embedded in the bilayer?
proteins
nucleic acids
ribosomes
glucose
10
What kind of transport doesn't require the use of energy to move materials across the membrane?
diffusion
osmosis
all of these don't require the cell to use energy
facilitated diffusion
11
__________ is the diffusion of water through a semipermeable membrane.
osmosis
facilitated diffusion
active transport
exocytosis
12
What kind of solution is the red blood cell in the middle in?
isotonic
hypotonic
hypertonic
hydroponic
13
Requires energy; vacuole fuses with membrane, contents forced out of cell = ?
phagocytosis
exocytosis
endocytosis
pinocytosis
14
Active transport
all of the answers are correct
requires energy
is usually done by transport proteins in the cell membrane
moves materials against a concentration gradient
15
What kind of solution is the red blood cell on the right in?
hypotonic
hydroponic
hypertonic
isotonic
16
Movement of particles from an area of high concentration to an area of lower concentration is:
endocytosis
osmosis
equilibrium
diffusion
17
Passive transport
moves particles against a concentration gradient.
requires energy.
doesn't require energy.
moves particles from a low to high concentration.
18
Equilibrium is reached
when particles are evenly distributed through the space.
when movement of particles stops.
only during passive transport.
at the end of active transport.
19
Which of these is selectively permeable?
all of these are selectively permeable
a fly screen
a strainer
a cell membrane
20
The stuff that is dissolved is the _________.
suspension
solution
solvent
solute
21
A cell is in a ____solution when: size doesn't change; water goes in and out at the same rate
hypertonic
isotonic
hypotonic
hydroponic
22
What is structure "D"?
cholesterol
a phospholipid
a glucose molecule
a protein
