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Heart
Heart
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Anatomy & Physiology of the human body. Circulatory System.
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1
This delivers de-oxygenated blood from the legs & lower extremities.
inferior vena cava
coronary sinus
jugular vein
superior vena cava
2
Intercalated discs are:
tight junctions at the ends of sequential cardiac muscle cells
connective tissue between skeletal muscle fibers
responsible for conducting electrical impulses through the myocardium
gap junctions on the sides of the adjacent cardiac muscle cells
3
The "pacemaker" of the heart is the
SA node
Bundle of HIS
AV node
Purkinje fibers
4
This delivers de-oxygenated blood from the upper body and the head to the right atrium
Inferior Vena Cava
Superior Aortic Valve
Inferior Sentinel Cava
Superior Vena Cava
5
During ventricular systole the AV valves are ______________ and the semilunar valves are ___________________
open, open
open, closed
closed, open
closed, closed
6
The word root "angina" means
cupboard
chamber
sensation
pain
7
This is the AV valve between the right atrium & right ventricle.
pulmonary valve
aortic valve
bicuspid valve
tricuspid valve
8
This is the AV valve between the left atrium and left ventricle.
bicuspid valve
pulmonary valve
semilunar valve
tricuspid valve
9
This structure is the start of the pulmonary circulation system
left atrium
aorta
pulmonary trunk
left ventricle
10
The QRS complex in an ECG represents
ventricular repolarization
atrial repolarization
ventricular depolarization
atrial depolarization
11
This blood vessel receives oxygenated blood from the left ventricle.
Jugular Vein
Carotid Artery
Superior Vena Cava
Aorta
12
Simple squamous epithelium lining the cardiovascular system is called
dense regular connective tissue
endothelium
serous membrane
cardiac muscle
13
Which of the following is
NOT
a factor that directly affects the regulation of stroke volume?
degree of stretch
forcefulness of contraction
degree of pressure needed
parasympathetic stimulation
14
The innermost layer of the heart.
visceral pericardium
endocardium
epicardium
myocardium
15
SL valve located between the right ventricle and the pulmonary trunk.
Mitral Valve
Pulmonary Valve
Bicuspid Valve
Tricuspid Valve
16
Which cardiac chamber has the thickest myocardium?
Right atrium
Right ventricle
Left atrium
Left ventricle
17
This is the wall that separates the two sides of the heart.
Bundle of His
S.A. Node
Septum
AV Node
18
This is the membranous protective sac that surrounds the heart.
pleura
perimetrium
peristalsis
pericardium
19
First heart sound (lubb) is caused by?
Vibration and closer of AV valves during contraction of the ventricles
Caused by closure of semilunar valves during relaxation of the ventricles
20
This is the SL valve between the left ventricle and the aorta.
pulmonary valve
aortic valve
mitral valve
bicuspid valve
21
What is the other name for the mitral valve?
bicuspid valve
pulmonary valve
tricuspid valve
aortic valve
22
This
chamber
is the start of the systemic circulation
right atrium
left atrium
right ventricle
left ventricle
23
The order of the conduction pathway of the heart is:
AV node, SA node, bundle of HIS, bundle branches, purkinje fibers
SA node, AV node, AV bundle, purkinje fibers, bundle branches
AV node, SA node, AV bundle, bundle branches, purkinje fibers
SA node, AV node, bundle of HIS, bundle branches, purkinje fibers
24
The amount of blood that is ejected from the left ventricle during one heartbeat is called
stroke volume
systole volume
contraction output
cardiac output
25
Parasympathetic impulses travelling by means of the vagus nerve would cause
No effect on the heart
Increased cardiac output
decreased heart rate
Increased heart rate
