If the SA node is damaged, and the AV node becomes the pacemaker of the heart,
heart rate will most likely
A) Stay the same
B) Increase
C) Decrease
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C) Decrease
Which below best describes the electrocardiogram (ECC or EKG) of a person with
partial heart block?
A) Some QRS complexes are not followed by T waves
B) Some T waves are not followed by QRS complexes
C) Some P waves are not followed by QRS complexes
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, C) Some P waves are not followed by QRS complexes
Concerning the heart, which of the following is FALSE?
A) The left side of the heart pumps blood to the lungs
B) Valves of the heart allow a one way flow of blood (they prevent backflow of blood)
C) The semilunar valves are located in vessels near the heart that carry blood away
from the heart
D) Blood flows from the right atrium past the tricuspid valve into the right ventricle
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A) The left side of the heart pumps blood to the lungs
When venous return increases, end diastolic volume ___ and stroke volume __ due to
___.
A) increases, increases, increased contractility
B) Decreases, decreases, decreased contractility
C) Increases, decreases, decreased contractility
D) Increases, increases, Starling's Law
E) increases, decreases, Starling's Law
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D) Increases, increases, Starling's Law
After passing through the atrial myocardium, the cardiac impulse reaches the __ in
which the impulse is delayed 0.1sec.
A) SA node
B) Purkinje fibers
, C) Bundle of His
D) AV node
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D) AV node
Increased sympathetic stimulation of the heart ___ heart rate and ___ contractility.
A) Increases, decreases
B) Increases, increases
C) Decreases, has no effect on
D) Increases, has no effect on
E) Decreases, increases
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B) Increases, increases
The Fc (stem) part of the antibody molecules can bind all of the following except
A) Phagocytes
B) Natural killer (NK) cells
C) C1 (a complement molecule)
D) Antigens
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D) Antigens
heart rate will most likely
A) Stay the same
B) Increase
C) Decrease
Give this one a try later!
C) Decrease
Which below best describes the electrocardiogram (ECC or EKG) of a person with
partial heart block?
A) Some QRS complexes are not followed by T waves
B) Some T waves are not followed by QRS complexes
C) Some P waves are not followed by QRS complexes
Give this one a try later!
, C) Some P waves are not followed by QRS complexes
Concerning the heart, which of the following is FALSE?
A) The left side of the heart pumps blood to the lungs
B) Valves of the heart allow a one way flow of blood (they prevent backflow of blood)
C) The semilunar valves are located in vessels near the heart that carry blood away
from the heart
D) Blood flows from the right atrium past the tricuspid valve into the right ventricle
Give this one a try later!
A) The left side of the heart pumps blood to the lungs
When venous return increases, end diastolic volume ___ and stroke volume __ due to
___.
A) increases, increases, increased contractility
B) Decreases, decreases, decreased contractility
C) Increases, decreases, decreased contractility
D) Increases, increases, Starling's Law
E) increases, decreases, Starling's Law
Give this one a try later!
D) Increases, increases, Starling's Law
After passing through the atrial myocardium, the cardiac impulse reaches the __ in
which the impulse is delayed 0.1sec.
A) SA node
B) Purkinje fibers
, C) Bundle of His
D) AV node
Give this one a try later!
D) AV node
Increased sympathetic stimulation of the heart ___ heart rate and ___ contractility.
A) Increases, decreases
B) Increases, increases
C) Decreases, has no effect on
D) Increases, has no effect on
E) Decreases, increases
Give this one a try later!
B) Increases, increases
The Fc (stem) part of the antibody molecules can bind all of the following except
A) Phagocytes
B) Natural killer (NK) cells
C) C1 (a complement molecule)
D) Antigens
Give this one a try later!
D) Antigens
