Answer Options:
A. a fixator
B. a synergist
C. an antagonist
D. an agonist
Answer: D. an agonist
Question: Which of the following surrounds the individual muscle cell?
Answer Options:
perimysium
fascicle
endomysium
epimysium
Answer: endomysium
Question: Although all skeletal muscles have different shapes, the fascicle arrangement of each muscle is exactly the same.
Answer Options:
A. True
B. False
Answer: B. False
Question: Muscles that help maintain upright posture are flexors.
Answer Options:
A. True
B. False
Answer: B. False
Question: Which of the following surrounds the individual muscle cell?
Answer Options:
a) perimysium
b) fascicle
c) endomysium
Answer: c) endomysium
Question: Which of the following surrounds the individual muscle cell?
Answer Options:
a) perimysium
b) fascicle
c) endomysium
Answer: c) endomysium
Question: Which of the following is the correct sequence of events for muscle contractions?
Answer Options:
a) neurotransmitter release, muscle cell action potential, motor neuron action potential, release of calcium ions from SR, sliding of myofilaments, ATP-driven power stroke
b) neurotransmitter release, motor neuron action potential, muscle cell action potential, release of calcium ions from SR, ATP-driven power stroke
Answer: b) neurotransmitter release, motor neuron action potential, muscle cell action potential, release of calcium ions from SR, ATP-driven power stroke
Question: Most skeletal muscles contain ________.
Answer Options:
a mixture of fiber types
a predominance of slow oxidative fibers
a predominance of fast oxidative fibers
muscle fibers of the same type
Answer: a mixture of fiber types
Question: Because many of the same cardiac cells are innervated by both parasympathetic and sympathetic fibers, the influence of the two divisions on the heart is synergistic.
Answer Options:
True
False
Answer: False
Question: Which of these is an inclusion, not an organelle?
Answer Options:
A. cilia
B. lysosome
C. microtubule
D. melanin
Answer: D. melanin
Question: If L = load, F = fulcrum, and E = effort, what type of lever system is described as LEF?
Answer Options:
A. second-class lever
B. first-class lever
C. third-class lever
D. fourth-class lever
Answer: C. third-class lever
Question: Rigor mortis occurs because ________.
Answer Options:
proteolytic enzymes are beginning to break down, thus preventing a flow of calcium ions.
sodium ions leak into the muscle causing continued contractions.
no ATP is available to release attached actin and myosin molecules.
the cells are dead.
Answer: no ATP is available to release attached actin and myosin molecules.
Question: If L = load, F = fulcrum, and E = effort, what type of lever system is described as LEF?
Answer Options:
A. second-class lever
B. first-class lever
C. third-class lever
D. fourth-class lever
Answer: C. third-class lever
Question: Because many of the same cardiac cells are innervated by both parasympathetic and sympathetic fibers, the innervation of the two divisions on the heart is synergistic.
Answer Options:
True
False
Answer: False
Question: Which of the following is the correct sequence of events for muscle contractions?
Answer Options:
neurotransmitter release, motor neuron action potential, muscle cell action potential, release of calcium ions from SR, ATP-driven power stroke
neurotransmitter release, muscle cell action potential, motor neuron action potential, release of calcium ions from SR, sliding of myofilaments, ATP-driven power stroke
motor neuron action potential, neurotransmitter release, muscle cell action potential, release of calcium ions from SR, ATP-driven power stroke, sliding of myofilaments
muscle cell action potential, neurotransmitter release, ATP-driven power stroke, calcium ion release from SR, sliding of myofilaments
Answer: neurotransmitter release, motor neuron action potential, muscle cell action potential, release of calcium ions from SR, ATP-driven power stroke
Question: The names of muscles often indicate the action of the muscle. What does the term levator mean?
Answer Options:
A. The muscle functions as a synergist.
B. The muscle is a fixator and stabilizes a bone or joint.
C. The muscle flexes and rotates a region.
D. The muscle elevates.
Answer: D. The muscle elevates.
Question: What is a muscle that provides the major force for producing a specific movement called?
Answer Options:
A. a fixator
B. a synergist
C. an antagonist
D. an agonist
Answer: D. an agonist
Question: Muscles are only able to pull, they never push.
Answer Options:
A. True
B. False
Answer: B. False
Question: Which of the following is an excitatory neurotransmitter secreted by motor neurons innervating skeletal muscle?
Answer Options:
a) cholinesterase
b) norepinephrine
c) gamma-aminobutyric acid
d) acetylcholine
Answer: d) acetylcholine