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5.0
Biol 212 Exam 1 & 2 Questions with Detailed Verified
Answers (100% Correct Answers) /Already Graded
A+
Quiz: GIVEN: The red blood cell membrane is impermeable to mannitol,
but is permeable to both water and glucose. Red blood cells will shrink
the most when immersed in:
Ans: a hyperosmotic mannitol solution
Quiz: During hemoglobin metabolism, the breakdown products of
heme become part of:
Ans: bile
Quiz: If potassium were at equilibrium across the cell membrane,
then what would be the direction of the electrochemical driving force
acting on potassium?
Ans: there is no electrochemical force at equilibrium
Quiz: Mice from a certain lab strain remain healthy as long as you
feed them regularly and do not let them exercise. After they eat, their
blood glucose level rises slightly and then declines to a homeostatic
level. However, if these mice fast or exercise at all, their blood glucose
drops dangerously. Which hypothesis best explains their problem?
Sunday, 02 March 2025
,Ans: The mice lack glucagon receptors on their cells.
Quiz: Anesthetics cross the cell membranes in nerve tissue relatively
easily. Therefore, anesthetics have a:
Ans: high partition coefficient
Quiz: A scientist is studying the passive movement of chemicals into a
cell. He measures the rate at which two chemicals diffuse into a cell, as
a function of their external concentration. Chemical A's diffusion is
directly proportional to the extracellular concentration but eventually
reaches a transport maximum, while Chemical B's rate of transport
continues to be directly proportional to external concentration.
How can one explain the differences in these diffusion rates?
Ans: Chemical A is moving by facilitated diffusion, while Chemical B is
diffusing through the phospholipids or through a channel.
Quiz: Given that oubain blocks the Na+/K+ pump, how would this
drug affect glucose transport in the small intestine?
Ans: Compared to normal, less glucose would be absorbed from the lumen
of the small intestine.
Quiz: You have a 0.022 OsM solution of glucose. This solution is:
Examstudy - Stuvia US
, Ans: hypo-osmotic to human cells.
Quiz: One long-term consequence of diabetes mellitus is that the
basement membrane below the endothelial cells of capillary walls
becomes thicker. If this happens, according to Fick's Law, the rate of
diffusion of substances from the blood to the tissues will:
Ans: decrease
Quiz: The primary cation inside the cell is:
Ans: potassium
Quiz: Under low oxygen conditions, __________ must unload its
electrons to allow glycolysis to continue its production of ATP:
Ans: NADH
Quiz: A 10% starch solution is separated from pure water by a
membrane which is impermeable to starch. What will happen?
Ans: Net water movement will eventually stop as a result of an opposing
hydrostatic pressure.
Quiz: The end products of the Krebs cycle include all of the following
except:
Examstudy - Stuvia US
In today's fast-paced educational landscape, students need reliable resources to excel in their studies.
5.0
Biol 212 Exam 1 & 2 Questions with Detailed Verified
Answers (100% Correct Answers) /Already Graded
A+
Quiz: GIVEN: The red blood cell membrane is impermeable to mannitol,
but is permeable to both water and glucose. Red blood cells will shrink
the most when immersed in:
Ans: a hyperosmotic mannitol solution
Quiz: During hemoglobin metabolism, the breakdown products of
heme become part of:
Ans: bile
Quiz: If potassium were at equilibrium across the cell membrane,
then what would be the direction of the electrochemical driving force
acting on potassium?
Ans: there is no electrochemical force at equilibrium
Quiz: Mice from a certain lab strain remain healthy as long as you
feed them regularly and do not let them exercise. After they eat, their
blood glucose level rises slightly and then declines to a homeostatic
level. However, if these mice fast or exercise at all, their blood glucose
drops dangerously. Which hypothesis best explains their problem?
Sunday, 02 March 2025
,Ans: The mice lack glucagon receptors on their cells.
Quiz: Anesthetics cross the cell membranes in nerve tissue relatively
easily. Therefore, anesthetics have a:
Ans: high partition coefficient
Quiz: A scientist is studying the passive movement of chemicals into a
cell. He measures the rate at which two chemicals diffuse into a cell, as
a function of their external concentration. Chemical A's diffusion is
directly proportional to the extracellular concentration but eventually
reaches a transport maximum, while Chemical B's rate of transport
continues to be directly proportional to external concentration.
How can one explain the differences in these diffusion rates?
Ans: Chemical A is moving by facilitated diffusion, while Chemical B is
diffusing through the phospholipids or through a channel.
Quiz: Given that oubain blocks the Na+/K+ pump, how would this
drug affect glucose transport in the small intestine?
Ans: Compared to normal, less glucose would be absorbed from the lumen
of the small intestine.
Quiz: You have a 0.022 OsM solution of glucose. This solution is:
Examstudy - Stuvia US
, Ans: hypo-osmotic to human cells.
Quiz: One long-term consequence of diabetes mellitus is that the
basement membrane below the endothelial cells of capillary walls
becomes thicker. If this happens, according to Fick's Law, the rate of
diffusion of substances from the blood to the tissues will:
Ans: decrease
Quiz: The primary cation inside the cell is:
Ans: potassium
Quiz: Under low oxygen conditions, __________ must unload its
electrons to allow glycolysis to continue its production of ATP:
Ans: NADH
Quiz: A 10% starch solution is separated from pure water by a
membrane which is impermeable to starch. What will happen?
Ans: Net water movement will eventually stop as a result of an opposing
hydrostatic pressure.
Quiz: The end products of the Krebs cycle include all of the following
except:
Examstudy - Stuvia US
