A&P STRAIGHTERLINE FINAL EXAM UPDATED
QUESTIONS AND ANSWERS SURE A+
✔✔Which of the following actions is caused by contraction of skeletal muscle?
Select one:
a. contraction of the heart
b. moving your feet in walking
c. movement of food through the digestive tract
d. emptying of the urinary bladder
e. vasoconstriction - ✔✔b. moving your feet in walking
✔✔What is smooth muscle tone?
Select one:
a. can rapidly develop action potentials
b. shallow invaginations of cell membrane
c. relatively constant tension maintained for a period of time
d. intracellular cytoskeleton
e. enzyme that removes phosphate from myosin - ✔✔c. relatively constant tension
maintained for a period of time
✔✔The sites where a chemical substance is transmitted from the presynaptic terminal
of an axon to the postsynaptic membrane of a muscle fiber are called
Select one:
a. neuromuscular junctions.
b. sarcomeres.
c. myofilaments.
d. Z disks.
e. cell body of neuron. - ✔✔a. neuromuscular junctions.
✔✔List the following structures in order from smallest to largest.
(1) muscle fiber
(2) myofilament
(3) myofibril
(4) muscle fasciculus
Select one:
a. 4, 2, 3, 1
b. 2, 1, 4, 3
c. 3, 1, 4, 2
d. 2, 3, 1, 4
e. 1, 2, 3, 4 - ✔✔d. 2, 3, 1, 4
,✔✔Which of the following is NOT true of muscular atrophy?
Select one:
a. It is irreversible.
b. It can be caused by disuse.
c. It can be caused by denervation.
d. Transcutaneous stimulation can help prevent it.
e. Muscle fibers are replaced by connective tissue. - ✔✔a. It is irreversible.
✔✔Myosin phosphatase
Select one:
a. activates myosin kinase.
b. forms the cross-bridge.
c. removes phosphate from myosin.
d. binds to calcium-calmodulin complex.
e. opens calcium channels. - ✔✔c. removes phosphate from myosin.
✔✔Which type of muscle tissue would cause flexion and extension of the arm?
Select one:
a. skeletal muscle
b. smooth muscle
c. cardiac muscle - ✔✔a. skeletal muscle
✔✔An isometric contraction is described as
Select one:
a. action potential frequency is high enough that no relaxation of muscle fibers occurs.
b. a muscle produces constant tension during contraction.
c. a muscle produces an increasing tension as the length remains constant.
d. a muscle produces increasing tension as it shortens.
e. a muscle produces tension, but the length of the muscle is increasing. - ✔✔c. a
muscle produces an increasing tension as the length remains constant.
✔✔Which of the following causes an unequal ion concentration across the resting
plasma membrane?
Select one:
a. the functioning of the sodium-chloride pump
b. negatively charged proteins do not readily diffuse across the plasma membrane
c. the attraction of chloride ions to other intracellular anions
d. the repulsion of potassium ions by the intracellular anions
,e. the attraction of sodium ions to chloride ions - ✔✔b. negatively charged proteins do
not readily diffuse across the plasma membrane
✔✔A stimulus either causes an action potential or it doesn't. This is called
Select one:
a. an all-or-none response.
b. a graded response.
c. a latent period response.
d. a relative refractory response.
e. an arbitrary response. - ✔✔a. an all-or-none response.
✔✔Body temperature
Select one:
a. is raised by sweating.
b. results from the heat produced when muscles contract.
c. will increase after blood vessels in the skin constrict.
d. is lowered by shivering.
e. decreases when the rate of the chemical reactions increase. - ✔✔b. results from the
heat produced when muscles contract.
✔✔Visceral smooth muscle
Select one:
a. may contain groups of cells that function as an independent unit.
b. occurs in sheets and exhibits numerous gap junctions.
c. contracts only when stimulated.
d. does not function as a unit.
e. All of these choices are correct. - ✔✔b. occurs in sheets and exhibits numerous gap
junctions.
✔✔Which of these is true of skeletal muscle?
A) spindle-shaped cells
B) under involuntary control
C) many peripherally located nuclei per muscle cell
D) forms the walls of hollow internal organs
E) may be autorhythmic - ✔✔C) many peripherally located nuclei per muscle cell
✔✔Which of these is not a major functional characteristic of muscle?
A) contractility
B) elasticity
C) excitability
D) extensibility
, E) secretability - ✔✔E) secretability
✔✔The connective tissue sheath that surrounds a muscle fasciculus is the
A) perimysium.
B) endomysium.
C) epimysium (fascia).
D) hypomysium.
E) external lamina. - ✔✔A) perimysium.
✔✔Given these structures:
1. whole muscle
2. muscle fiber (cell)
3. myofilament
4. myofibril
5. muscle fasciculus
Choose the arrangement that lists the structures in the correct order from the largest to
the smallest structure.
A) 1,2,5,3,4
B) 1,2,5,4,3
C) 1,5,2,3,4
D) 1,5,2,4,3
E) 1,5,4,2,3 - ✔✔D) 1,5,2,4,3
✔✔Each myofibril
A) is made up of many muscle fibers.
B) contains sarcoplasmic reticulum.
C) is made up of many sarcomeres.
D) contains T tubules.
E) is the same thing as a muscle fiber. - ✔✔E) is the same thing as a muscle fiber.
✔✔Myosin myofilaments are
A) attached to the Z disk.
B) found primarily in the I band.
C) thinner than actin myofilaments.
D) absent from the H zone.
E) attached to filaments that form the M line. - ✔✔E) attached to filaments that form the
M line.
✔✔Which of these statements about the molecular structure of myofilaments is true?
A) Tropomyosin has a binding site for Ca2+.
B) The head of the myosin molecule binds to an active site on G actin.
C) ATPase is found on troponin.
D) Troponin binds to the rodlike portion of myosin.
E) Actin molecules have a hingelike portion that bends and straightens during
contraction. - ✔✔B) The head of the myosin molecule binds to an active site on G actin.
QUESTIONS AND ANSWERS SURE A+
✔✔Which of the following actions is caused by contraction of skeletal muscle?
Select one:
a. contraction of the heart
b. moving your feet in walking
c. movement of food through the digestive tract
d. emptying of the urinary bladder
e. vasoconstriction - ✔✔b. moving your feet in walking
✔✔What is smooth muscle tone?
Select one:
a. can rapidly develop action potentials
b. shallow invaginations of cell membrane
c. relatively constant tension maintained for a period of time
d. intracellular cytoskeleton
e. enzyme that removes phosphate from myosin - ✔✔c. relatively constant tension
maintained for a period of time
✔✔The sites where a chemical substance is transmitted from the presynaptic terminal
of an axon to the postsynaptic membrane of a muscle fiber are called
Select one:
a. neuromuscular junctions.
b. sarcomeres.
c. myofilaments.
d. Z disks.
e. cell body of neuron. - ✔✔a. neuromuscular junctions.
✔✔List the following structures in order from smallest to largest.
(1) muscle fiber
(2) myofilament
(3) myofibril
(4) muscle fasciculus
Select one:
a. 4, 2, 3, 1
b. 2, 1, 4, 3
c. 3, 1, 4, 2
d. 2, 3, 1, 4
e. 1, 2, 3, 4 - ✔✔d. 2, 3, 1, 4
,✔✔Which of the following is NOT true of muscular atrophy?
Select one:
a. It is irreversible.
b. It can be caused by disuse.
c. It can be caused by denervation.
d. Transcutaneous stimulation can help prevent it.
e. Muscle fibers are replaced by connective tissue. - ✔✔a. It is irreversible.
✔✔Myosin phosphatase
Select one:
a. activates myosin kinase.
b. forms the cross-bridge.
c. removes phosphate from myosin.
d. binds to calcium-calmodulin complex.
e. opens calcium channels. - ✔✔c. removes phosphate from myosin.
✔✔Which type of muscle tissue would cause flexion and extension of the arm?
Select one:
a. skeletal muscle
b. smooth muscle
c. cardiac muscle - ✔✔a. skeletal muscle
✔✔An isometric contraction is described as
Select one:
a. action potential frequency is high enough that no relaxation of muscle fibers occurs.
b. a muscle produces constant tension during contraction.
c. a muscle produces an increasing tension as the length remains constant.
d. a muscle produces increasing tension as it shortens.
e. a muscle produces tension, but the length of the muscle is increasing. - ✔✔c. a
muscle produces an increasing tension as the length remains constant.
✔✔Which of the following causes an unequal ion concentration across the resting
plasma membrane?
Select one:
a. the functioning of the sodium-chloride pump
b. negatively charged proteins do not readily diffuse across the plasma membrane
c. the attraction of chloride ions to other intracellular anions
d. the repulsion of potassium ions by the intracellular anions
,e. the attraction of sodium ions to chloride ions - ✔✔b. negatively charged proteins do
not readily diffuse across the plasma membrane
✔✔A stimulus either causes an action potential or it doesn't. This is called
Select one:
a. an all-or-none response.
b. a graded response.
c. a latent period response.
d. a relative refractory response.
e. an arbitrary response. - ✔✔a. an all-or-none response.
✔✔Body temperature
Select one:
a. is raised by sweating.
b. results from the heat produced when muscles contract.
c. will increase after blood vessels in the skin constrict.
d. is lowered by shivering.
e. decreases when the rate of the chemical reactions increase. - ✔✔b. results from the
heat produced when muscles contract.
✔✔Visceral smooth muscle
Select one:
a. may contain groups of cells that function as an independent unit.
b. occurs in sheets and exhibits numerous gap junctions.
c. contracts only when stimulated.
d. does not function as a unit.
e. All of these choices are correct. - ✔✔b. occurs in sheets and exhibits numerous gap
junctions.
✔✔Which of these is true of skeletal muscle?
A) spindle-shaped cells
B) under involuntary control
C) many peripherally located nuclei per muscle cell
D) forms the walls of hollow internal organs
E) may be autorhythmic - ✔✔C) many peripherally located nuclei per muscle cell
✔✔Which of these is not a major functional characteristic of muscle?
A) contractility
B) elasticity
C) excitability
D) extensibility
, E) secretability - ✔✔E) secretability
✔✔The connective tissue sheath that surrounds a muscle fasciculus is the
A) perimysium.
B) endomysium.
C) epimysium (fascia).
D) hypomysium.
E) external lamina. - ✔✔A) perimysium.
✔✔Given these structures:
1. whole muscle
2. muscle fiber (cell)
3. myofilament
4. myofibril
5. muscle fasciculus
Choose the arrangement that lists the structures in the correct order from the largest to
the smallest structure.
A) 1,2,5,3,4
B) 1,2,5,4,3
C) 1,5,2,3,4
D) 1,5,2,4,3
E) 1,5,4,2,3 - ✔✔D) 1,5,2,4,3
✔✔Each myofibril
A) is made up of many muscle fibers.
B) contains sarcoplasmic reticulum.
C) is made up of many sarcomeres.
D) contains T tubules.
E) is the same thing as a muscle fiber. - ✔✔E) is the same thing as a muscle fiber.
✔✔Myosin myofilaments are
A) attached to the Z disk.
B) found primarily in the I band.
C) thinner than actin myofilaments.
D) absent from the H zone.
E) attached to filaments that form the M line. - ✔✔E) attached to filaments that form the
M line.
✔✔Which of these statements about the molecular structure of myofilaments is true?
A) Tropomyosin has a binding site for Ca2+.
B) The head of the myosin molecule binds to an active site on G actin.
C) ATPase is found on troponin.
D) Troponin binds to the rodlike portion of myosin.
E) Actin molecules have a hingelike portion that bends and straightens during
contraction. - ✔✔B) The head of the myosin molecule binds to an active site on G actin.
