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