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GCU BIO-201 EXAM 1 QUESTIONS &
ANSWERS (RATED A+)
Question : Pinocytosis
Correct answer: Cell drinking
Question : Phagocytosis
Correct answer: Cell eating
Question : Exocytosis
Correct answer: release of substances outside a cell by the
fusion of a vesicle with the membrane.
Question : Endocytosis
Correct answer: process by which a cell takes material
into the cell by infolding of the cell membrane
Question : osmosis
Correct answer: Low to High, Diffusion of water through
a selectively permeable membrane
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Question : Diffusion
Correct answer: Movement of molecules from an area of
higher concentration to an area of lower concentration.
Question : tonicity
Correct answer: the ability of a surrounding solution to
cause a cell to gain or lose water
Question : isotonic solution
Correct answer: when the concentration of two solutions
is the same (moving in and out equally)
Question : hypertonic solution
Correct answer: A solution in which the concentration of
solutes is greater outside then inside the cell that resides in the solution
Question : hypotonic solution
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Correct answer: Solute concentration is less than the
inside the cell; cell gains water
Question : oncotic pressure
Correct answer: pulls fluid into the capillaries and/or
prevents fluid from leaving.
Question : hydrostatic pressure
Correct answer: increases filtration by pushing fluid and
solute OUT of the capillaries
Question : crenation
Correct answer: This happens when a cell shrinks and
shrivels; can result in cell death if severe.
Question : hemolysis
Correct answer: destruction/split of red blood cells
Question : active transport
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Correct answer: the movement of ions or molecules
across a cell membrane into a region of higher concentration, assisted by enzymes and requiring energy.
Question : passive(facilitated) transport
Correct answer: the movement of substances across a cell
membrane without the use of energy by the cell
Question : Co-transport
Correct answer: TWO substances are transported together
by one protein no ATPase activity
Question : Countertransport
Correct answer: One substance is being transported into
the cell membrane and the other is getting transported in the opposite direction.
Question : What are some factors that affect diffusion?
Correct answer: • Temperature
• Solvent Density