Cell Transport Quiz
Molecular Pumps is when
a cell uses energy to pump molecules across the membrane against the gradient, through a protein channel
transport proteins act as
a channel or carrier
Is Exocytosis active or passive?
active
Is active transport active or passive?
active
Concentration
amount of solute dissolved in a solvent
Movement of water out of a cell means
cell shrivels
identical water to cells cytoplasm means
cell stays the same/doesn't expand/shrink
movement of water into a cell means
cell swells/expands
How does Osmosis help maintain homeostasis
controls blood pressure by regulating blood volume
solvent
does the dissolving
equilibrium
equally concentrated on both sides of the membrane (inside/outside)
Active Transport requires
extra energy to be spent to bring materials into the cell or expel materials out of the cell moving from low to high concentration against the concentration gradient.
low concentration water means
high solute concentration
high concentration water means
low solute concentration
What are examples if active transport
molecular pumps, exocytosis, endocytosis
Passive transport requires
no extra energy by the cell because molecules move from high concentration to low concentration areas down the concentration gradient
Is Osmosis active or passive?
passive
Is facilitated diffusion active or passive?
passive
Is simple diffusion active or passive?
passive
What does selective permeability mean?
picky about what goes in/out
thins that can not easily pass through the cell membrane include
polar and/or large molecules
How does facilitated Diffusion help maintain homeostasis
regulates blood sugar
Molecular pumps allows a cell to
remove waste quickly
The cell membrane is
selective permeable
Osmosis is the
simple diffusion of water across a cell membrane
What are examples if passive transport
simple diffusion, facilitated diffusion, and osmosis
Simple diffusion is
spreading out of molecules across a membrane until equilibrium is reached
things that can easily pass through the cell membrane include
things that are small, non-polar, hydrophobic, water, and/or neutral.
facilitated diffusion
transport proteins help to facilitate the diffusion of molecules that normally couldn't pass through the cell membrane
Solution
uniform mixture of two or more substances
Exocytosis
uses vesicles to export materials out of the cell
Edocytosis
uses vesicles to move large particles into the cell
Hypertonic solution is when
water is lower than the cells cytoplasm
solute
what gets dissolved
How does Exocytosis help maintain homeostasis
By exporting materials out of the cell through the cell membrane
How does Endocytosis help maintain homeostasis
By importing materials into the cell through the cell membrane
How does Simple Diffusion help maintain homeostasis
Carries water across the cell membrane
How does Active Transport help maintain homeostasis
Muscle Contractions and signal conduction