Biology Quiz
____ is the molecule that provides the energy for active transport
ATP
what is the other thing you need to know for passive transports?
Cells will naturally lose or gain water through osmosis to maintain homeostasis.
what is 1 of the things you have to know about passive transports?
The passive transport of water across a cell membrane is called osmosis.
sodium potassium
(Na+ -K+)
____________ transport requires energy from ATP to move substances across membranes
active
endocytosis, exocytosis, and Na+-K+ pumps are all kinds of __________ transport because they use energy to move substances across membranes
active
endocytosis, the sodium-postassium pump, and exocytosis are all kinds of _______________ transport
active
is endocytosis active or passive
active
is exocytosis active or passive
active
is sodium potassium passive or active
active
receptor-mediated endocytosis is active or passive
active
Requires ATP
active transport
pumps are an example
active transport
when molecules move DOWN the concentration gradient it means they are moving from
an area of high concentration to an area of lower concentration
2 layers of molcules
bilayer
what does diffusion use to help?
carrier proteins
what does facilitated diffusion use to help
carrier proteins
what does ion channels use to help it
carrier proteins
a _________ protein is an integral membrane protein that helps move molecules across a cell membrane
channel
_______________ moves oxygen and carbon dioxide molecules from a high concentration to a low concentration across membranes
diffusion
movement of particles from an area of high concentration to an area of lower concentration is called
diffusion
what is the solute
dots
does passive transport work up or down the concentration gradient?
down
when molecules move from high to low along a concentration gradient we say they are moving _______ the gradient
down
During diffusion molecules tend to move
down the concentration gradient
what does active transport require to move molecules across membranes
energy
all of the following are kinds of passive transport EXCEPT
exocytosis
golgi bodies use _________ to transport molecules out of cells.
exocytosis
what do golgi bodies use to release molecules outside the cell
exocytosis
during what does diffusion carrier proteins grab gluclose molecules, change shape, and flip to the other side of the membrane, like a revolving door
facilated
the diffusion of water across a selectively permeable membrane is called out
facilitated diffusion
allows them to change, shape, grow, shrink, and move
flexible (fluid)
a concentration ________ forms whenever there is a difference in concentration between one place and another
gradient
when the concentration of a solute is the same throughout a system, the system has reached
homeostasis
the polar includes?
hydrophilic
the non polar tails include?
hydrophobic
_________tonic means there is a GREATER concentration of solute molecules OUTSIDE the cell than inside
hyper
in a _________ solution, water leaves a cell by osmosis, causing the cell to shrink
hypertonic
_________tonic means there is a LOWER concentration of solute molecules OUTSIDE the cell than inside
hypo
in a _____________ solution, water enters a cell by osmosis, causing the cell the swell.
hypotonic
example of subtance that use exocytosis in cells
insulin
Ca++, H+, Na+, and K+ move across membranes by going through passageways called
ion channels
a cell must expend energy to transport substances using
ion channels
what is an example of substances that use ion channels in cells
ions
what is an example of substances that use sodium potassium in cells
ions
___________tonic means there is the SAME concentration of solute molecules outside the cell as inside
iso
a cell placed in an _____________ solution neither swells or shrinks because the concentration of molecules outside the cell is the same as inside
isotonic
in a ________ solution, water molecules move into and out of the cell at the same rate
isotonic
proteins (like carrier proteins) that stick INTO the cell membrane either part way or all the way or through are called ______________ proteins
isotonic
what does osmosis use to help
it doesn't have help
what is the non polar tails made of?
lipids
what is an example of substances that use diffusion in cells
living/nonliving
example of substance that use receptor-mediated endocytosis in cells
lysosomes
energy for active transport comes from a cell's
mitochondria
the cell organelles that burns glucose and provides ATP for active transport are the
mitochondria
movement of _______ across a membrane is called ________
molecules; transport
placing an animal cell in a hypotonic solution will cause water to ___________
move into the cell
osmosis
moves water across membranes
example of substance that use endocytosis in cells
one cell eating another
____________ transport does NOT REQUIRE energy
passive
is diffusion active or passive transport?
passive
is facilitated diffusion active or passive
passive
is ion channels active or passive
passive
is osmosis active or passive transport
passive
moves molecules from an area of high concentration to an area of low concentration
passive transport
moves molecules with the concentration gradient
passive transport
osmosis is an example
passive transport
the movement of a particle through the plasma membrane without the use of energy is called
passive transport
living and non living
passive transports
the carrier proteins that help in facilitated diffusion are _____________ proteins
peripheral
what is the polar head of a phospholipid made of?
phosphate
made of lipids
phospholipids
what does sodium potassium use to help
pumps
why does salt dehydrate?
salt water is hypertonic to the cell and it pulls water out
allows only certain substances to move in and out
semi permeable
a _________-__________-______ uses ATP to move three Na+ ions out of a cell while it moves two K+ ions in.
sodium-potassium-pump
The substance that dissolves to make a solution is called the
solvent
what is an example of substances that use facilitated diffusion in cells
sugar
if the solute is unable to pass through the dividing membrane, what will happen?
the water level will rise on the right side of the tube
___________ = _______________ = ________________ = ____________
transport protein = channel protein = carrier protein = ion channel
a small membrane sac used to transport substances during exocytosis & endocytosis =
vesicle
what does endocytosis use to help
vesicle
what does exocytosis use to help
vesicle
what does receptor-mediated endocytosis use to help
vesicle
what is an example of substances that use osmosis in cells
water
