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Which of the following statements best predicts the effect of a substance that blocks
... [Show More] creatine kinase
activity?
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Topic 12: Spinal Cord, Spindal Nerves, Brain and Cranial Nerves
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e. action potential.
d. power stroke.
a. muscle tone.
b. action reaction.
c. recovery stroke.
When the myosin head flexes into a bend, pulling the actin filament along with it, this is called the
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Question 2
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d. ATP production from creatine phosphate would decrease.
a. ADP production from creatine phosphate would increase.
b. ATP production from creatine phosphate would increase.
c. ADP production from creatine phosphate would decrease.
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Question 3
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d. release of from the sarcoplasmic reticulum.
b. release of the myosin head from the G actin molecule.
c. action potential propogation along the transverse tubules.
a. movement of the tropomyosin molecule.
Calcium ion blocking agents would most likely affect
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Question 4
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a. Increasing stimulation of a muscle fiber results in increased formation of cross-bridges.
b. Muscle fibers that are stretched to the optimal length will provide higher numbers of cross-bridges.
c. Muscle fibers that have larger diameters have more myofibrils and therefore can form more crossbridges.
Which of the following statementsdoes not accurately describe factors that determine the amount of
force generated during a muscle contraction?
Select one:c. levator palpebrae superioris
d. auricular
e. temporalis
b. occipitofrontalis
a. procerus
Raising the eyebrows is the action of the muscle.
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Question 7
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d. The number of cross-bridges that can form is higher in a short muscle fiber compared to longer
fibers.
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b. spasm
c. incomplete tetanus
d. flaccid paralysis
e. fatigue
a. complete tetanus
If one nerve stimulus arrives at a muscle fiber so soon that the fiber has only partially relaxed from
the previous twitch, the most likely result will be .
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Question 6
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e. Rectus abdominis
d. External abdominal oblique
a. Transversus abdominis
b. Internal abdominal oblique
c. Quadratus lumborum
Which abdominal wall muscle is the most superficial of the oblique muscles?
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b. Pectineus
c. Tensor fasciae latae
d. Sartorius
e. Iliotibial tract
a. Vastus lateralis
Which of the following is a part of the quadriceps femoris muscle group?
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d. Inferior rectus
e. Inferior oblique
c. Superior oblique
a. Lateral rectus
b. Superior rectus
The figure illustrates a lateral view of the right eyeball. What does "B" represent?
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b. Masseter
c. Orbicularis oris
d. Nasalis
e. Temporalis
a. Orbicularis oculi
Of the following muscles of the head, which one wraps around the orbits?
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e. An inflow of K+
d. An outflow of Cl−
a. An inflow of Ca2+
b. An inflow of Na+
c. An inflow of Cl−
Which of the following will cause the plasma membrane to hyperpolarize when at its resting
membrane potential?
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Question 12
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d. Synaptic vesicle
e. Synaptic cleft
c. Presynaptic terminal
a. Voltage-gated Ca2+ channel
b. Postsynaptic membrane
The figure illustrates events at a chemical synapse. What does "C" represent?
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Question 13
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b. sensory receptors
c. spinal nerves
d. ganglia
e. cranial nerves
a. spinal cord
The central nervous system includes the .
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d. have no effect on the action of norepinephrine.
e. prevent synaptic transmission.
c. enhance the binding of norepinephrine to its receptors.
a. enhance the breakdown of norepinephrine.
b. prevent the release of norepinephrine by the presynaptic terminal.
Monamine oxidase inhibitors (MAO inhibitors)
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e. bundles of myelinated axons.
a. collections of unmyelinated axons.
b. collections of nerve cell bodies.
c. ganglial sheaths.
d. bundles containing both myelinated axons and nerve cell bodies.
White matter is composed of
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Question 16
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b. The diaphragm
c. Intercostal muscles
d. Muscles of the lower limb
e. Abdominal muscles
a. Muscles of the arm and forearm
The brachial plexus supplies nerves that function to contract which of the following?
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a. The middle meninx
Match the term with its correct definition.
Reflex arc
Select one:Question text
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d. Most superficial and thickest meninx
e. The meninx bound tightly to brain and spinal cord
c. Functional unit of the nervous system
b. Separates dura mater from periosteum
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c. 7 cervical - 12 thoracic - 6 lumbar - 5 sacral - 1 coccygeal
d. 7 cervical - 12 thoracic - 5 lumbar - 6 sacral - 1 coccygeal
e. 8 cervical - 12 thoracic - 6 lumbar - 4 sacral - 1 coccygeal
b. 8 cervical - 12 thoracic - 5 lumbar - 5 sacral - 1 coccygeal
a. 7 cervical - 13 thoracic - 6 lumbar - 5 sacral - 1 coccygeal
Which of the following combinations indicates the correct distribution of spinal nerve pairs?
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b. Golgi tendon reflex
c. Reciprocal innervation
d. Crossed extensor reflex
e. Withdrawal reflex
a. Stretch reflex
Match the action with the specific reflex.
Knee-jerk reflex
Select one:e. radial
d. musculocutaneous
a. axillary
b. ulnar
c. median
Using the biceps brachii to flex the forearm requires innervation by the nerve.
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d. fluent but circular speech.
e. loss of memory.
c. a slight shaking of the hands or head.
a. uncontrolled rage.
b. loss of the sense of smell.
Lesions of the basal nuclei could cause
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b. thalamic nuclei
c. cerebellum
d. vermis
e. basal nuclei
a. reticular formation
The sleep/wake cycle is influenced by the .
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e. sneeze.
d. turn their head toward the right.
a. raise their arms.
b. hit you.
c. turn their head toward the left.
When you walk up behind someone and tap their right shoulder, they will reflexively
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d. tegmentum
e. reticular nuclei
c. basal nuclei
a. tectum
b. red nuclei
The substantia nigra interconnects with the .
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b. trochlear; facial
c. trigeminal; facial
d. facial; glossopharyngeal
e. trigeminal; glossopharyngeal
a. facial; trigeminal
Motor control of the face is the function of the nerve, while sensation from the face is
determined by the nerve.
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