HCS 215: The Cell Questions With Complete Solutions
__________ is acted upon by the enzyme __________ to form
__________.
-Linoleic acid; cyclooxygenase; prostaglandins
-Arachidonic acid; lipoxygenase; prostaglandins
-Arachidonic acid; phospholipase A2; leukotrienes
-Arachidonic acid; cyclooxygenase; prostaglandins Correct
Answers Arachidonic acid; cyclooxygenase; prostaglandins
__________ is when the actions of the body's __________
overwhelm that of the __________.
-Oxidative coincidence; antioxidants; antioxidants
-Oxidative stress; antioxidants; oxidants
-Emotional stress; oxidants; other oxidants
-Oxidative stress; oxidants; antioxidants Correct Answers
Oxidative stress; oxidants; antioxidants
A 300 mOsm cell is placed in a 200 mOsm solution. The solute
particles inside the cell are the same as those outside the cell, all
of which are permeant to the membrane. Determine the new
osmolarity of the ICF.
-150 mOsm
-250 mOsm
-400 mOsm
-500 mOsm Correct Answers 250 mOsm
A 300 mOsm cell is placed in a 550 mOsm solution. The solute
particles inside the cell are different from those outside the cell.
None of the solute particles inside the cell are permeant to the
membrane. All of the solute particles in the surrounding solution
,are permeant to the membrane. Describe the surrounding
solution.
-hyper-osmotic and hypertonic
-hyper-osmotic and hypotonic
-hypo-osmotic and hypertonic
-hypo-osmotic and hypotonic Correct Answers hyper-osmotic
and hypotonic
A 300 mOsm cell is placed in a 600 mOsm solution. The solute
particles inside the cell are different from those outside the cell.
None of the solute particles inside the cell are permeant to the
membrane. All of the solute particles in the surrounding solution
are permeant to the membrane. Determine the new osmolarity of
the ICF.
-150 mOsm
-450 mOsm
-600 mOsm
-900 mOsm Correct Answers 600 mOsm
A cell's membrane potential (Vm) is -70 mV, the concentration
of K+ is greater inside the cell, and K+'s equilibrium potential
(Ek) is -94 mV. Which of the following statements is FALSE?
-The inside of the cell has enough negative charge to prevent K+
from following its chemical driving force.
-The chemical driving force acting on K+ is stronger than the
electrical driving force acting on K+.
-The electrical driving force acting on K+ is to move it into the
cell.
-The electrochemical gradient for K+ in this situation follows
the chemical driving force. Correct Answers The inside of the
,cell has enough negative charge to prevent K+ from following
its chemical driving force.
A college student had a very poor diet during her first semester
away from home. She tried convincing her parents that her poor
diet caused her to receive a failing grade in physiology due to
the fact that her lack of nutrient intake caused her to run low on
amino acid neurotransmitters--which, of course, hindered her
ability to learn. Should her parents believe her?
-No, they should not believe her.
-Yes, they should believe her. Correct Answers No, they
should not believe her.
A free radical is considered to be a type of __________ that
__________ removes electrons from another substance; it does
this because it has one or more __________.
-oxidant; inappropriately; unpaired electrons
-acid; appropriately; paired electrons
-oxidant; appropriately; unpaired electrons
-base; appropriately; unpaired electrons Correct Answers
oxidant; inappropriately; unpaired electrons
A neuroscientist was running an experiment to determine how
much dopamine was present in a group of dopaminergic
(dopamine secreting) neurons in a particular brain region. She
knew that some of the cells in a nearby brain region secreted
norepinephrine. She took a sample of cells from the
dopaminergic region and a sample of cells from the region
where the cells secreted norepinephrine, keeping them separate
from one another. She put them into a solution that degraded the
phospholipids of the cells in order to release the intracellular
, contents into the solution. When she tested each of the two
solutions of cellular contents, what do you think she found?
-Dopamine did not appear to be present in either of the solutions
because all the dopamine was contained in vesicles, preventing
it from being measured.
-Dopamine was present in the dopaminergic cells but not in the
cells that secrete norepinephrine.
-Dopamine was pre Correct Answers Dopamine was present in
the solution containing the dopaminergic cells and the cells that
secreted norepinephrine.
A primary active transport process is one in which __________.
-molecules pass directly through the phospholipid bilayer of the
plasma membrane
-molecules move through transport proteins that have been
activated by ATP
-an intracellular vesicle fuses with the plasma membrane and
releases its contents to the extracellular fluid
-molecules move across the plasma membrane without an input
of energy
-the plasma membrane folds inward to form a vesicle containing
extracellular material Correct Answers molecules move
through transport proteins that have been activated by ATP
A prostaglandin is a type of ____________, which is a type of
lipid.
-eicosanoid
-leukotrienes
-steroids
-protein Correct Answers eicosanoid
__________ is acted upon by the enzyme __________ to form
__________.
-Linoleic acid; cyclooxygenase; prostaglandins
-Arachidonic acid; lipoxygenase; prostaglandins
-Arachidonic acid; phospholipase A2; leukotrienes
-Arachidonic acid; cyclooxygenase; prostaglandins Correct
Answers Arachidonic acid; cyclooxygenase; prostaglandins
__________ is when the actions of the body's __________
overwhelm that of the __________.
-Oxidative coincidence; antioxidants; antioxidants
-Oxidative stress; antioxidants; oxidants
-Emotional stress; oxidants; other oxidants
-Oxidative stress; oxidants; antioxidants Correct Answers
Oxidative stress; oxidants; antioxidants
A 300 mOsm cell is placed in a 200 mOsm solution. The solute
particles inside the cell are the same as those outside the cell, all
of which are permeant to the membrane. Determine the new
osmolarity of the ICF.
-150 mOsm
-250 mOsm
-400 mOsm
-500 mOsm Correct Answers 250 mOsm
A 300 mOsm cell is placed in a 550 mOsm solution. The solute
particles inside the cell are different from those outside the cell.
None of the solute particles inside the cell are permeant to the
membrane. All of the solute particles in the surrounding solution
,are permeant to the membrane. Describe the surrounding
solution.
-hyper-osmotic and hypertonic
-hyper-osmotic and hypotonic
-hypo-osmotic and hypertonic
-hypo-osmotic and hypotonic Correct Answers hyper-osmotic
and hypotonic
A 300 mOsm cell is placed in a 600 mOsm solution. The solute
particles inside the cell are different from those outside the cell.
None of the solute particles inside the cell are permeant to the
membrane. All of the solute particles in the surrounding solution
are permeant to the membrane. Determine the new osmolarity of
the ICF.
-150 mOsm
-450 mOsm
-600 mOsm
-900 mOsm Correct Answers 600 mOsm
A cell's membrane potential (Vm) is -70 mV, the concentration
of K+ is greater inside the cell, and K+'s equilibrium potential
(Ek) is -94 mV. Which of the following statements is FALSE?
-The inside of the cell has enough negative charge to prevent K+
from following its chemical driving force.
-The chemical driving force acting on K+ is stronger than the
electrical driving force acting on K+.
-The electrical driving force acting on K+ is to move it into the
cell.
-The electrochemical gradient for K+ in this situation follows
the chemical driving force. Correct Answers The inside of the
,cell has enough negative charge to prevent K+ from following
its chemical driving force.
A college student had a very poor diet during her first semester
away from home. She tried convincing her parents that her poor
diet caused her to receive a failing grade in physiology due to
the fact that her lack of nutrient intake caused her to run low on
amino acid neurotransmitters--which, of course, hindered her
ability to learn. Should her parents believe her?
-No, they should not believe her.
-Yes, they should believe her. Correct Answers No, they
should not believe her.
A free radical is considered to be a type of __________ that
__________ removes electrons from another substance; it does
this because it has one or more __________.
-oxidant; inappropriately; unpaired electrons
-acid; appropriately; paired electrons
-oxidant; appropriately; unpaired electrons
-base; appropriately; unpaired electrons Correct Answers
oxidant; inappropriately; unpaired electrons
A neuroscientist was running an experiment to determine how
much dopamine was present in a group of dopaminergic
(dopamine secreting) neurons in a particular brain region. She
knew that some of the cells in a nearby brain region secreted
norepinephrine. She took a sample of cells from the
dopaminergic region and a sample of cells from the region
where the cells secreted norepinephrine, keeping them separate
from one another. She put them into a solution that degraded the
phospholipids of the cells in order to release the intracellular
, contents into the solution. When she tested each of the two
solutions of cellular contents, what do you think she found?
-Dopamine did not appear to be present in either of the solutions
because all the dopamine was contained in vesicles, preventing
it from being measured.
-Dopamine was present in the dopaminergic cells but not in the
cells that secrete norepinephrine.
-Dopamine was pre Correct Answers Dopamine was present in
the solution containing the dopaminergic cells and the cells that
secreted norepinephrine.
A primary active transport process is one in which __________.
-molecules pass directly through the phospholipid bilayer of the
plasma membrane
-molecules move through transport proteins that have been
activated by ATP
-an intracellular vesicle fuses with the plasma membrane and
releases its contents to the extracellular fluid
-molecules move across the plasma membrane without an input
of energy
-the plasma membrane folds inward to form a vesicle containing
extracellular material Correct Answers molecules move
through transport proteins that have been activated by ATP
A prostaglandin is a type of ____________, which is a type of
lipid.
-eicosanoid
-leukotrienes
-steroids
-protein Correct Answers eicosanoid
