Cell membrane Flashcards
the _____ ________ model is used to describe the structure of the cell membrane
fluid mosaic
A form of endocytosis with a smaller substances are brought into the cell by forming vesicles at the cell membrane
Pinocytosis
_______ Transport via proteins requires no energy input
facilitated
the ______ gland Requires the active transport of iodine out of the blood and into it cells
thyroid
a membrane is said to be _________ Permeable if it lets somethings pass through it but does not allow other things to pass
Selectively
The movement of a vacuole out of the cell
exocytosis
A homogeneous mixture where one substance is dissolved into another
solution
A type of endocytosis where larger substances are brought into the cell by forming vacuoles at the cell membrane
phagocytosis
diffusion is the movement of molecules from the area of ________ consentration to the area of _______ consentration
greater, lesser
osmosis is the movement of _____ across a selectively permeable membrane
water
a cell is isotonic to a solution of 0.01% sugar
what consentration would be hypertonic, hypotonic and isotonic
> 0.01%
<0.01%
=0.01%
what happens to an animal cell in a hypotonic solution
it swells and bursts
what happens to an animal cell in a hypertonic solution?
it looses water and shrivels
what happens to an animal cell in an isotonic solution
no change occurs
turgor pressure occurs in plant cells that are in a?
hypotonic solution
the movement of oxygen and carbon dioxide between alveoli and the capillaries of the lungs is an example of?
diffusion
Chloride ions moving in or out of a cell with the concentration gradient is an example of
facilitated transport
The concentrating of iodine within the thyroid gland is an example of
active transport
The protein hormone insulin being released from cells of the pancreas is an example of
bulk transport
which processes use ATP
active transport and bulk transport
Which processes require a channel/carrier protein in the cell membrane?
facilitated transport and active transport
Which processes move only in the direction of the concentration gradient?
diffusion and facilitated transport
Red blood cells neither gain nor lose water when put into 0.9% NaCl.
a) What term would you use to describe the tonicity of 0.9% NaCl for Red blood cells?
isotonic
A small lipid molecule passes easily through the cell membrane. Which of these statements is the most likely explanation?
a protein carrier must be at work
Correct
the cell membrane is partly composed of lipid molecules
the cell is expending energy to do this
phagocytosis has enclosed this molecule in a vacuole
the cell membrane is partly composed of lipid molecules