How does the heart muscle extract O2 or nutrients from the blood?
a. via the coronary circulation
b. absorption through the ventricles
c. absorption through the atria
d. via the vena cava
e. via the pulmonary artery
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Question 2) Any organ in the PNS that is innervated by a motor neuron is generally called a(n) ________.
Fill in the blank(s) with correct word
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Question 3) What else is diastolic heart failure referred to as?
a. heart failure with preserved ejection fraction
b. heart failure with reduced filling fraction
c. congestive heart failure
d. forward failure
e. backward failure
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Question 4) The ____________________ nervous system conducts impulses to the CNS.
Fill in the blank(s) with correct word
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Question 5) What is the main determinant of cardiac muscle fiber length?
a. heart rate
b. systolic blood pressure
c. diastolic blood pressure
d. the degree of systolic filling
e. the degree of diastolic filling
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Question 6) The efferent division of the PNS is divided into the ____________________ nervous system, which innervates skeletal muscles, and the ____________________ nervous system, which innervates smooth muscle, cardiac muscle, and glands.
Fill in the blank(s) with correct word
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Question 7) Stroke volume is determined by:
a. the extent of venous return and by parasympathetic activity
b. the extent of venous return and by sympathetic activity
c. the extent of arterial return and by parasympathetic activity
d. the extent of arterial return and by sympathetic activity
e. blood pressure and ventricular size
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Question 8) The ____________________ nervous system stimulates only digestive organs, and this system is a subdivision of the ____________________ division of the PNS.
Fill in the blank(s) with correct word
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Question 9) Sympathetic stimulation of the AV node reduces the AV nodal delay by increasing conduction velocity as a result of enhancing the inward current of what element?
a. potassium
b. phosphorus
c. sodium
d. calcium
e. iron
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Question 10) The ____________________ system coordinates rapid responses of the body, whereas the ____________________ system is responsible for regulating metabolic functions and activities that require duration rather than speed.
Fill in the blank(s) with correct word
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