Pathophysiology Quiz 1
EXAMA LATEST QUESTINS
AND VERIFIED CORRECT
ANSWERS
What is diffusion? - correct answer The movement of particles from an area of high
concentration to an area of low concentration.
What happens after endocytosis occurs? - correct answer lysosomal enzymes process and
digest material
What is osmosis? - correct answer diffusion of water across a selectively permeable membrane
What is filtration? - correct answer the measurement of water and solutes through a membrane
because of a greater pushing pressure.
What is hydrostatic pressure? - correct answer the mechanical force of water pushing against
cellular membranes.
What is oncotic pressure? - correct answer Osmotic pressure exerted by colloids in solution.
What is osmotic pressure? - correct answer The amount of hydrostatic pressure required to
oppose the osmotic movement of water
, What is the resting membrane potential? - correct answer Difference in electrical charge across
the membrane at rest
What is action potential? - correct answer the change in electrical potential associated with the
passage of an impulse along the membrane of a muscle cell or nerve cell.
How does DNA replicate? - correct answer DNA molecule unwinds and each strand is a
template for complementary base pairing; each daughter helix contains an intact strand from
the parent helix and a newly synthesized strand therefore DNA replication is semiconservative
What are the four phases of the cell cycle? - correct answer (1) the S phase, during which DNA
synthesis takes place in the cell nucleus; (2) the G2 phase, the period between the completion
of DNA synthesis and the next phase (M); (3) the M phase, which involves both nuclear (mitotic)
and cytoplasmic (cytokinetic) division; and (4) the G1 phase (growth phase), after which the
cycle begins again.
What are the four stages of the M phase (Mitosis)? - correct answer prophase, metaphase,
anaphase, and telophase.
What is DNA composed of? - correct answer deoxyribose, a phosphate molecule, and four types
of nitrogenous bases. The physical structure of DNA is a double helix
What does DNA polymerase do? - correct answer Joins individual nucleotides to make
complementary strands and proofreads the sequence of bases and corrects errors
What is transcription? - correct answer The process of making RNA from DNA
What is translation? - correct answer the decoding of an mRNA message into a protein