PNB 2250 Exam 3 UCONN Questions And Answers With Real Tests
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Course
PNB 2250
Institution
PNB 2250
PNB 2250 Exam 3 UCONN Questions And Answers With Real Tests
The loss of digestive wastes, CO2 and NH4+ are examples of _______________. ANS excretion
The regulation of H2O and solutes is via ___________________. ANS osmoregulation
Water moves from an area of ________ (low, high) osmolarity...
PNB 2250 Exam 3 UCONN Questions And Answers
With Real Tests
The loss of digestive wastes, CO2 and NH4+ are examples of _______________. ANS excretion
The regulation of H2O and solutes is via ___________________. ANS osmoregulation
Water moves from an area of ________ (low, high) osmolarity to an area of __________ (low, high)
osmolarity ANS low, high
___________: a chemical dissolved in a solvent (H2O is the only solvent we are interested in) [6.02].
___________s occupy space within H2O ANS solute
Osmolarity : measure of the number of ____________ per _________ of H2O, expressed as
osmoles/liter (OsM/L) or milliosmoles/liter (mOsM/L). ANS solutes, liter
Hypertonic (hyperosmotic): a comparison of the osmolarity of two solutions, with one solution have
a ___________ number of solutes (and less H2O) than the other solution. ANS greater
Hypotonic (hypoosmotic): again a comparison of the the osmolarity of two solutions, with one
solution have ___________ solutes (and more H2O) than the other solution. ANS fewer
Isotonic (isoosmotic): two solutions with the _________ osmolarity and H2O content. ANS same
Which solution has the highest osmolarity?
A) 1M/L sucrose
B) 1M/L NaCl
C) 0.1M/L CaCl2
D) 1M/L ZnCl2 ANS D
, The movement of water across the cell membrane can ___________ cells ANS destroy
Because of the factors affecting diffusion, H2O will move from an area of higher concentration (low
osmolarity) to an area of lower concentration (higher osmolarity) if the cell membrane is permeable
to H2O [6.03]. The movement of H2O in this way is a very powerful force, capable of rupturing
membranes and causing damage to animals. This force is known as ________________
________________. ANS osmotic pressure
Placement of cells into which solution will cause them to burst?
A) Isotonic
B) Hypotonic
C) Hypertonic ANS B
Placement of cells in a ______________ solution (more H2O outside than inside the cell) causes
H2O to rush into the cell, bursting it ANS hypotonic
Placement of cells in a _______________ solution (less H2O outside than inside the cell) causes
H2O to leave the cell ANS hypertonic
Small solutes need integral ______________ to pass through the membrane ANS proteins
Solutes or water can cross a cell membrane via ___________, _______________, or
______________ ANS pumps, transporters, channels
Membrane solute permeability can require ______ ANS ATP
________ have a solute-binding pocket exposed to the extracellular or intracellular aqueous
environment. After solute binding, the energy inside _____ is used to drive a reversible
conformational movement of the protein that exposes the solute-binding pocket to the other face of
the membrane. ANS pumps
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