Question 1

If there is a difference in osmolarity between a cell and its environment, water will move_______ its osmotic pressure gradient.

Accepted Answer

A)   across
B)   through
C)   up
D)   between
E)   downF) A) and B)
G) All of the above

Question 2

If one ion carried a greater quantity of charge than another, then the electrical driving force for the ion with the greater quantity of charge would (increase/decrease).

Accepted Answer

The answer of If one ion carried a greater quantity...

Question 3

Describe the process whereby water moves passively across a membrane.

Accepted Answer

Water moves across a cell membrane throu...

Question 4

In active transport, the affinity of the carrier protein for the molecule being transported is greater on which side of the membrane?

Accepted Answer

A)   always the side facing the intracellular fluid
B)   always the side facing the extracellular fluid
C)   on the side where the molecule is in lower concentration
D)   on the side where the molecule is in greater concentration
E)   Neither; it is equal on both sides of the membrane.F) A) and B)
G) D) and E)

Question 5

Which ion(s)  have a net chemical force acting to move the ion(s)  into the cell? (Assume a resting membrane potential (Vm)  of -70mV.)

Accepted Answer

A)   X+, whose [ECF] is 120 mM and [ICF] is 30 mM
B)   A -, whose [ECF] is 100 mM and [ICF] is 100 mM
C)   B -, whose [ECF] is 140 mM and [ICF] is 30 mM
D)   both X+ and B -ions
E)   X+, A -, and B -ionsF) A) and D)
G) A) and C)

Question 6

The process of diffusion involves the random movement of

Accepted Answer

A)   charged particles across a membrane.
B)   individual molecules due to thermal motion.
C)   ions against their concentration gradient.
D)   molecules that is inversely proportional to its concentration.
E)   individual molecules based on their size and weight.F) B) and C)
G) All of the above

Question 7

With pulmonary hypertension, the lung's capillary walls become thicker to compensate for the higher pressure. What does Fick's law suggest will happen to CO2 concentrations?

Accepted Answer

A)   CO2 levels in the tissues will decrease.
B)   CO2 levels in the blood will remain the same.
C)   CO2 in the alveoli will increase.
D)   CO2 levels in the blood will increase.
E)   CO2 levels in the cells will decrease.F) A) and C)
G) A) and E)

Question 8

Molecules with a relatively high lipid solubility are capable of crossing the membrane

Accepted Answer

A)   directly through the lipid bilayer.
B)   only with the addition of energy.
C)   only through specific protein channels.
D)   indirectly by moving across a carrier protein.
E)   through specific lipid channels.F) A) and E)
G) A) and B)

Question 9

In epithelial transport, movement from the internal environment to the external environment is
called _______ , whereas movement from the external environment to the internal environment is called_______

Accepted Answer

A)   excretion : ingestion
B)   catch : release
C)   absorption : excretion
D)   pinocytosis : exocytosis
E)   secretion : absorptionF) A) and E)
G) A) and B)

Question 10

All of the following solutes are found in higher concentration outside of the cell EXCEPT

Accepted Answer

A)   chloride.
B)   sodium.
C)   proteins.
D)   HCO3 -.
E)   magnesium.F) B) and C)
G) A) and C)

Question 11

As the magnitude of charge difference across the membrane increases, the magnitude of the electrical driving force would (increase/decrease) across that membrane.

Accepted Answer

The answer of As the magnitude of charge difference across...

Question 12

Endocytosis is a form of active transport (requiring energy)  to move vesicles

Accepted Answer

A)   containing particles into and out of the cell, also known as phagocytosis.
B)   containing proteins out of the cell, also known as secretion.
C)   filled with particles and/or fluids out of the cell.
D)   filled with particles and/or fluids into the cell.
E)   containing fluids into and out of the cell, also known as pinocytosis.F) B) and C)
G) A) and E)

Question 13

The equilibrium potential describes the membrane potential where what two forces are balanced?

Accepted Answer

A)   chemical and electrical
B)   density and magnetic
C)   electrical and permeability
D)   temperature and density
E)   chemical and temperatureF) B) and E)
G) A) and B)

Question 14

A 150 mM solution of NaCl is isotonic.

Accepted Answer

A) True 
 B)False

Question 15

Which the following descriptions would be an example of phagocytosis?

Accepted Answer

A)   a macrophage imbibing its surrounding tissue fluid and nutrients
B)   the elimination of a phagolysosome's contents from a neutrophil
C)   a low -density lipoprotein that becomes internalized by a hepatic cell
D)   choline's reabsorption by a neuron
E)   bacteria that is engulfed by a white blood cellF) C) and D)
G) A) and E) E

Question 16

What transport process couples the movement of an ion against its electrochemical gradient to another ion that is moving down its electrochemical gradient that was established using cellular energy (ATP) ?

Accepted Answer

A)   primary active transport
B)   secondary active transport
C)   tertiary passive transport
D)   primary passive transport
E)   secondary passive transportF) All of the above
G) A) and E)

Question 17

Which the following descriptions would be an example of pinocytosis?

Accepted Answer

A)   a low -density lipoprotein that becomes internalized by a hepatic cell
B)   the elimination of a phagolysosome's contents from a neutrophil
C)   a macrophage drinking its surrounding tissue fluid and nutrients
D)   bacteria that is engulfed by a white blood cell
E)   choline's reabsorption by a neuronF) B) and E)
G) All of the above

Question 18

Which of the following can be used to determine an ion's equilibrium potential?

Accepted Answer

A)   Nernst equation
B)   intracellular voltmeter
C)   concentration of an ion only
D)   Navier -Stokes equation
E)   oscilloscopeF) A) and E)
G) B) and C)

Question 19

Which of the following transport mechanisms requires energy?

Accepted Answer

A)   facilitated diffusion
B)   osmosis
C)   phagocytosis
D)   movement of ion through ion channels
E)   diffusionF) B) and E)
G) D) and E) C

Question 20

If a 300 mOsm cell (10 mOsm of which are from the membrane permeable molecule urea)  is placed into 300 mOsm solution containing no urea, what will happen to the cell?

Accepted Answer

A)   swell
B)   no change
C)   burst
D)   increased turgor
E)   shrink (shrivel) F) C) and E)
G) C) and D) E

Exam 4: Cell Membrane Transport

If there is a difference in osmolarity between a cell and its environment, water will move_______ its osmotic pressure gradient.

Correct AnswerverifiedShow Answer

If one ion carried a greater quantity of charge than another, then the electrical driving force for the ion with the greater quantity of charge would (increase/decrease).

Correct AnswerverifiedShow Answer

Describe the process whereby water moves passively across a membrane.

Correct AnswerverifiedWater moves across a cell membrane throu...View AnswerShow Answer

In active transport, the affinity of the carrier protein for the molecule being transported is greater on which side of the membrane?

Correct AnswerverifiedShow Answer

Which ion(s) have a net chemical force acting to move the ion(s) into the cell? (Assume a resting membrane potential (Vm) of -70mV.)

Correct AnswerverifiedShow Answer

The process of diffusion involves the random movement of

Correct AnswerverifiedShow Answer

With pulmonary hypertension, the lung's capillary walls become thicker to compensate for the higher pressure. What does Fick's law suggest will happen to CO2 concentrations?

Correct AnswerverifiedShow Answer

Molecules with a relatively high lipid solubility are capable of crossing the membrane

Correct AnswerverifiedShow Answer

In epithelial transport, movement from the internal environment to the external environment is called _______ , whereas movement from the external environment to the internal environment is called_______

Correct AnswerverifiedShow Answer

All of the following solutes are found in higher concentration outside of the cell EXCEPT

Correct AnswerverifiedShow Answer

As the magnitude of charge difference across the membrane increases, the magnitude of the electrical driving force would (increase/decrease) across that membrane.

Correct AnswerverifiedShow Answer

Endocytosis is a form of active transport (requiring energy) to move vesicles

Correct AnswerverifiedShow Answer

The equilibrium potential describes the membrane potential where what two forces are balanced?

Correct AnswerverifiedShow Answer

A 150 mM solution of NaCl is isotonic.

Correct AnswerverifiedShow Answer

Which the following descriptions would be an example of phagocytosis?

Correct AnswerverifiedE

What transport process couples the movement of an ion against its electrochemical gradient to another ion that is moving down its electrochemical gradient that was established using cellular energy (ATP) ?

Correct AnswerverifiedShow Answer

Which the following descriptions would be an example of pinocytosis?

Correct AnswerverifiedShow Answer

Which of the following can be used to determine an ion's equilibrium potential?

Correct AnswerverifiedShow Answer

Which of the following transport mechanisms requires energy?

Correct AnswerverifiedC

If a 300 mOsm cell (10 mOsm of which are from the membrane permeable molecule urea) is placed into 300 mOsm solution containing no urea, what will happen to the cell?

Correct AnswerverifiedE

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Water moves across a cell membrane throu...
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Which ion(s) have a net chemical force acting to move the ion(s) into the cell? (Assume a resting membrane potential (V_m) of -70mV.)

Correct Answer
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With pulmonary hypertension, the lung's capillary walls become thicker to compensate for the higher pressure. What does Fick's law suggest will happen to CO₂concentrations?

Correct Answer
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In epithelial transport, movement from the internal environment to the external environment is called _ , whereas movement from the external environment to the internal environment is called_

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E

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C

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E