1. Gases such as oxygen and carbon
dioxide cross the cell membrane by
a) passive diffusion through the lipid
bilayer
b) primary active
transport
c)
specific gas transport proteins
d)
secondary active transport
2.Carrier proteins are take part in
a)Water transport
b)Active transport of ions
c)Passive transport of ions
d)None of these
3. Which of the following is an example of primary active transport?
a)Cl--HCO3- exchange
b)Na+ K+ ATPase
b)Na+ K+ ATPase
c)Na+ - H+ exchange
d)Na+-Ca2+ exchange
4. The principal intracellular cation is:
a)Na+
b)Ca+
c)K+
d)Cl-
a)Na+
b)Ca+
c)K+
d)Cl-
5.
The sodium pump
a)Exchanges extracellular Na+ for intracellular K+
b)Is an ion channel
c)Is important for maintaining a constant cell volume
d)Can only be inhibited by metabolic poisons
a)Exchanges extracellular Na+ for intracellular K+
b)Is an ion channel
c)Is important for maintaining a constant cell volume
d)Can only be inhibited by metabolic poisons
6. Which of the following values is closest to
the resting membrane potential of mammalian cells:
a)+20 mV
b)-20 mV
c)-60 mV
d)+60 mV
a)+20 mV
b)-20 mV
c)-60 mV
d)+60 mV
7. Which of the following statements
regarding exocytosis is correct?
a)Is always employed by cells for secretion
b)Takes up large molecules from the extracellular space
c)Allows the retrieval of elements of the cell membrane
d)Is used to deliver material into the extracellular space
a)Is always employed by cells for secretion
b)Takes up large molecules from the extracellular space
c)Allows the retrieval of elements of the cell membrane
d)Is used to deliver material into the extracellular space
8.
Endocytosis is used by cells to:
a)Ingest bacteria and cell debris
b)Retrieve elements of the cell membrane after exocytosis
c)Secrete large molecules into the extracellular space
d)None of these
a)Ingest bacteria and cell debris
b)Retrieve elements of the cell membrane after exocytosis
c)Secrete large molecules into the extracellular space
d)None of these
9. Pinocytosis
10. The resting membrane potential is mainly determined by:
a)the K+ gradient
b)the Cl- gradient
c)the Ca2+ gradient
d)the Na+ gradient
a)At sites of membrane called coated pits.
d)All of these
b)For large protein molecule
c)By formation of pinocytic vesicle.
10. The resting membrane potential is mainly determined by:
a)the K+ gradient
b)the Cl- gradient
c)the Ca2+ gradient
d)the Na+ gradient
11. Which of the
following process requires membrane proteins?
a)Pinocytosis
b)exocytosis
b)exocytosis
c)Phagocytosis
d)Receptor mediated endocytosis
12. Phagocytosis
a)Is preceded by opsonization
b)Requires presence of Ca2+ ions in extracellular fluid.c)Occurs mainly in leucocytes
d)All of these
Learn more:
1.a) passive diffusion through the lipid bilayer
2. b)Active transport of ions
3. b)Na+ K+ ATPase
4. c)K+
5. c)Is important for maintaining a constant cell volume
6. c)-60 mV
7. d)Is used to deliver material into the extracellular space
8. b)Retrieve elements of the cell membrane after exocytosis
9. d)All of these
10. a)the K+ gradient
11. d)Receptor mediated endocytosis
12. d)All of these
- Notes on Membrane Transport- Passive and Active Transport
- Notes on Exocytosis and Endocytosis (Phagocytosis, Pinocytosis and Receptor Mediated endocytosis)
- Quiz on Cell Membrane (Plasma Membrane)
1.a) passive diffusion through the lipid bilayer
2. b)Active transport of ions
3. b)Na+ K+ ATPase
4. c)K+
5. c)Is important for maintaining a constant cell volume
6. c)-60 mV
7. d)Is used to deliver material into the extracellular space
8. b)Retrieve elements of the cell membrane after exocytosis
9. d)All of these
10. a)the K+ gradient
11. d)Receptor mediated endocytosis
12. d)All of these
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