APHY 201 CHAPTER 1 EXAM PREP QUESTIONS WITH
VERIFIED ANSWERS
Placing a red blood cell into this solution will result in the crenation. This solution is
A. 0.9 NaCl
B. 0.5
C. 9.0
D. 0.7
E. 0.1 - Answers - C. 9.0% NaCl
Carrier molecules involved involved in facilitative diffusion or active transport:
A. are membrane-bound proteins
B. transport solvent as well as solute
C. may be carbohydrate, lipid, protein
D. Enter the plasma membrane on one surface and leave it from the other surface
E. always carry solutes out of the cell - Answers - A. are membrane bound proteins
The organelle where most of the cell's proteins are synthesized is the:
A nucleus
B Lysosome
C rough ER
D smooth ER
E Centrosome - Answers - C. rough ER
Which of the following requires a supply of metabolic energy because the solute moves
"uphill"?
A dialysis
B osmosis
C Facilitative diffusion
D net difusion
E Primary Active Transport - Answers - E Primary Active Transport
Simple diffusion (net diffusion without carrier assistance) differs from facilitated diffusion
because it:
A is much slower
B can be blocked by competitive inhibitors
C reaches a maximum rate
D requires expenditure of energy
E is not affected by a change in concentration gradient - Answers - A. is much slower
(no carrier)
A process called _____________ involves invagination of the plasma membrane
A osmosis
B facilitated diffusion
,C exocytosis
D endocytosis
E simple diffusion - Answers - D. Endocytosis
A secretory vesicle leaves the cell by:
A net diffusion
B exocytosis
C endocytosis
D phagocytosis
E pinocytosis - Answers - B exocytosis (exit)
Transmission at the neuromuscular junction is dependent upon:
A curare
B acetylecholine
C noradrenaline
D seratonin
E actin & myosin - Answers - B acetylcholine
Which of the following regarding dialysis is false:
A a membrane is required
B A solute concentration gradient must exist
C it is kind of net diffusion
D it is affected by change in temperature
E a membrane carrier may be required - Answers - E. A membrane carrier may be
required
In which of the following would the velocity of nerve impulse conduction be the least?
A large diameter unmyelinated fibers
B small diameter unmyelinated fibers
C large diameter myelinated fibers
D small diameter myelinated fibers
E none of the preceding because they conduct impulses at the same velocty - Answers
- B. small diameter unmyelinated fibers (lower conduction without myelination)
In a process of facilitated diffusion
A a substrate is moved against its concentration gradient
B the carrier mechanism is directly coupled to an energy-yielding reaction
C membrane carriers assist the downhill movement of a solute
D solvents are transported from higher to lower concentration
E membrane-bound carriers may or may not be required - Answers - C membrane
carriers assist the downhill movement of a solute
Transmission at the neauromuscular junction (NMJ) is dependent upon:
A ach
B acetylocholine
C cholinesterase
, D sodium ions
E all - Answers - E all are necessary for transmission
Symport refers to carrier transport of a solute
A against an electrical gradient
B couple to and in the same direction as Na+ transport
C coupled to but in the opposite direction as Na+ transport
D against an osmotic gradient
E through the nuclear envelope - Answers - B couple to and in the same direction as
Na+ transport (same)
Dialysis:
A can occure without a membrane
B requires a membrane-bound carrier
C is directly coupled to energy-yielding reactions
D is a process of reverse osmosis
E is the net diffusion of a solute though a selectively permeable membrane - Answers -
E is the net diffusion of a solute though a selectively permeable membrane
Osmometer. Water moved from beaker to dialysis bag filled with sugar solution. This
water movement is the process of
A osmosis
B dialysis
C simple diffusion
D facilitative diffusion
E active transport - Answers - A osmosis
A facilitated transport system can become saturated because
A all binding sites are filled
B the channel is filled with diffusing molecules
C the channel becomes too saturated
D the gate becomes closed
E all the above - Answers - A. all the binding sites are filled
A red blood cell is placed in a 0.9% NaCl solution and intracellular volume does not
change because:
A the salt solution is hypotonic
B the salt concentration inside the cell is 0.9%
C the salt solution is hypertonic
D the plasma membrane is impermeable to water
E intracellular and extracellular fluids are iso-osmotic - Answers - E intracellular &
extracellular fluids are *ISO-OSMOTIC*
The smaller the motor unit arrangement in skeletal muscle:
A the less precise the degree of neural control of the muscle
B the greater the strength of the skeletal muscle
VERIFIED ANSWERS
Placing a red blood cell into this solution will result in the crenation. This solution is
A. 0.9 NaCl
B. 0.5
C. 9.0
D. 0.7
E. 0.1 - Answers - C. 9.0% NaCl
Carrier molecules involved involved in facilitative diffusion or active transport:
A. are membrane-bound proteins
B. transport solvent as well as solute
C. may be carbohydrate, lipid, protein
D. Enter the plasma membrane on one surface and leave it from the other surface
E. always carry solutes out of the cell - Answers - A. are membrane bound proteins
The organelle where most of the cell's proteins are synthesized is the:
A nucleus
B Lysosome
C rough ER
D smooth ER
E Centrosome - Answers - C. rough ER
Which of the following requires a supply of metabolic energy because the solute moves
"uphill"?
A dialysis
B osmosis
C Facilitative diffusion
D net difusion
E Primary Active Transport - Answers - E Primary Active Transport
Simple diffusion (net diffusion without carrier assistance) differs from facilitated diffusion
because it:
A is much slower
B can be blocked by competitive inhibitors
C reaches a maximum rate
D requires expenditure of energy
E is not affected by a change in concentration gradient - Answers - A. is much slower
(no carrier)
A process called _____________ involves invagination of the plasma membrane
A osmosis
B facilitated diffusion
,C exocytosis
D endocytosis
E simple diffusion - Answers - D. Endocytosis
A secretory vesicle leaves the cell by:
A net diffusion
B exocytosis
C endocytosis
D phagocytosis
E pinocytosis - Answers - B exocytosis (exit)
Transmission at the neuromuscular junction is dependent upon:
A curare
B acetylecholine
C noradrenaline
D seratonin
E actin & myosin - Answers - B acetylcholine
Which of the following regarding dialysis is false:
A a membrane is required
B A solute concentration gradient must exist
C it is kind of net diffusion
D it is affected by change in temperature
E a membrane carrier may be required - Answers - E. A membrane carrier may be
required
In which of the following would the velocity of nerve impulse conduction be the least?
A large diameter unmyelinated fibers
B small diameter unmyelinated fibers
C large diameter myelinated fibers
D small diameter myelinated fibers
E none of the preceding because they conduct impulses at the same velocty - Answers
- B. small diameter unmyelinated fibers (lower conduction without myelination)
In a process of facilitated diffusion
A a substrate is moved against its concentration gradient
B the carrier mechanism is directly coupled to an energy-yielding reaction
C membrane carriers assist the downhill movement of a solute
D solvents are transported from higher to lower concentration
E membrane-bound carriers may or may not be required - Answers - C membrane
carriers assist the downhill movement of a solute
Transmission at the neauromuscular junction (NMJ) is dependent upon:
A ach
B acetylocholine
C cholinesterase
, D sodium ions
E all - Answers - E all are necessary for transmission
Symport refers to carrier transport of a solute
A against an electrical gradient
B couple to and in the same direction as Na+ transport
C coupled to but in the opposite direction as Na+ transport
D against an osmotic gradient
E through the nuclear envelope - Answers - B couple to and in the same direction as
Na+ transport (same)
Dialysis:
A can occure without a membrane
B requires a membrane-bound carrier
C is directly coupled to energy-yielding reactions
D is a process of reverse osmosis
E is the net diffusion of a solute though a selectively permeable membrane - Answers -
E is the net diffusion of a solute though a selectively permeable membrane
Osmometer. Water moved from beaker to dialysis bag filled with sugar solution. This
water movement is the process of
A osmosis
B dialysis
C simple diffusion
D facilitative diffusion
E active transport - Answers - A osmosis
A facilitated transport system can become saturated because
A all binding sites are filled
B the channel is filled with diffusing molecules
C the channel becomes too saturated
D the gate becomes closed
E all the above - Answers - A. all the binding sites are filled
A red blood cell is placed in a 0.9% NaCl solution and intracellular volume does not
change because:
A the salt solution is hypotonic
B the salt concentration inside the cell is 0.9%
C the salt solution is hypertonic
D the plasma membrane is impermeable to water
E intracellular and extracellular fluids are iso-osmotic - Answers - E intracellular &
extracellular fluids are *ISO-OSMOTIC*
The smaller the motor unit arrangement in skeletal muscle:
A the less precise the degree of neural control of the muscle
B the greater the strength of the skeletal muscle
