Where is the AV node located within the heart?
a. right ventricle
b. left ventricle
c. right atrium
d. left atrium
e. the apex
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Question 2) The withdrawal reflex requires ascending pathways and is classified as polysynaptic.
Indicate whether the statement is true or false
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Question 3) What is the range of action potentials per minute for the cells in the AV node?
a. 20 - 40
b. 40 - 60
c. 70 - 80
d. 80 - 100
e. 100 - 120
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Question 4) Information as to whether a finger was touching an ice cube or being hit by a hammer would be carried to the brain in different ascending tracts within the spinal cord.
Indicate whether the statement is true or false
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Question 5) Where are the heart cells with the fastest rate of action potential initiation localized?
a. apex of the heart
b. Purkinje fibers
c. Bundle of His
d. AV node
e. SA node
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Question 6) A bundle of neuron cell bodies in the CNS is a ganglion, whereas a bundle of axons in the PNS is a nerve.
Indicate whether the statement is true or false
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Question 7) What element is involved in the most important ion outward movement that gives rise to the pacemaker potential?
a. sodium
b. potassium
c. calcium
d. phosphorus
e. iron
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Question 8) Efferent neurons leave the spinal cord through the dorsal root.
Indicate whether the statement is true or false
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Question 9) What percentage of cardiac muscle cells are contractile?
a. 33
b. 50
c. 75
d. 85
e. 99
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Question 10) Aphasia is a speech impediment due to weakness or lack of coordination of speech muscles.
Indicate whether the statement is true or false
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