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Chapter 3 BIO 260 Questions and Answers 100% Solved
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Chapter 3 BIO 260 Questions and Answers 100% Solved
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Chapter 3 BIO 260 Questions and Answers 100% Solvedions that use specific protein channels in the membrane use a process called____________ to
move down their concentration gradient across the plasma membrane Correct Ans-
facilitated diffusion
__________ is the name the transport mechanism in which water molecules move through a
selectively permeable membrane toward the solution with more impermeant (one that
cannot cross the membrane) Correct Ans-osmosis
the passive transport mechanism in which small solutes are forced through a membrane by
hydrostatic pressure is known as Correct Ans-filtration
true or false: active transport processes require cellular energy (ATP) while passive transport
don't require cellular energy (ATP) Correct Ans-true; the source of energy in active
transport processes is cellular energy while in most passive processes the sources of energy is
molecular motion
active transport is a process that moves particles through a membrane from a region of
_________ concentration to a region of _______ concentration Correct Ans-low; higher
, Chapter 3 BIO 260 Questions and Answers 100% Solved
the source of energy for __________ transport mechanisms is cellular energy Correct Ans-
active
endocytosis takes particles ________ the cell bh using _________ Correct Ans-into;
vesicles
phagocytosis is the process by which cells engulf ________ from extracellular fluid Correct
Ans-solid particles
exocytosis uses _______ to move substances _________ the cell Correct Ans-vesicles; out
of
the three main stages of the cell cycle are interphase, mitosis, and _________ Correct Ans-
cytokinesis
place the stages of mitosis in the correct order with the beginning of the process at the top
Correct Ans-prophase
, Chapter 3 BIO 260 Questions and Answers 100% Solved
metaphase
anaphase
telophase
true or false: interphase is the resting stage and therefore no cellular activity takes place
Correct Ans-false; a lot of cellular activity is taking place during interphase
what type of cells retains the ability to divide repeatedly into any type of cell, thus allowing
the body to repair and grow Correct Ans-stem cell
some types of active transport use energy provided by ATP molecules Correct Ans-true
endoplasmic reticulum is best described as a Correct Ans-network of interconnected
membranes
, Chapter 3 BIO 260 Questions and Answers 100% Solved
what term describes the series of events that a cell undergoes from the time it forms until the
time it divides Correct Ans-the cell cycle
what is the definition of apoptosis Correct Ans-programmed cell death
a cell surrounded by an extremely thin, flexible membrane. why is the membrane selectively
permeable Correct Ans-it allows some substances to pass through and excludes others
based on size, polarity and other factors
cell division consists of mitosis and cell differentiation Correct Ans-false
red blood cells are placed in a solution of 0.9% NaCl and no diffusion or osmosis is observed.
this means that the solution is Correct Ans-isotonic
some people cannot be infected with HIV because Correct Ans-their cells lack receptors
that admit the virus
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