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when the ventricular walls relax
the bicuspid and tricuspid valves open
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the A-V valves are
mitral and tricuspid valves
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the inner sac covering and enclosing the heart is the
visceral pericardium
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the skeleton of the heart consists of
fibrous rings encircling the atrioventricular orifices, the aortic, pulmonary proximal ends and the interventricular septum
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which of the following represents the correct sequence of parts throught which blood moves in passing from the vena cava to the lungs?
right atrium, tricuspid valve, right ventricle, pulmonary valve
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The correct sequence of parts that function to carry cardiac impulses is
S-A node, A-V node, A-V bundle, Purkinje fibers
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In an ECG pattern the T-wave is caused by
repolarization of ventricular muscle fibers
-
Diagnosis of hypertension is indicated by
diastolic pressure of 91 mmHg or more
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The pulmonary circuit
sends deoxygenated blood to the lung
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which of the following supplies blood to parts of the intestinal tract?
superior mesenteric artery
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which of the following is not a branch of the aorta?
pulmonary artery
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The phrenic artery provides blood to the
diaphragm
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which type of blood vessel holds the greatest volume of blood?
veins
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Certain ions in the blood will influence heart action; _ ions may suddenly stop the heart, causing cardiac arrest
excessive of potassium (k+)
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plasma protiens that remain in the blood capillaries help to
maintain the osmotic pressure of the blood
-
with a stethoscope placed on the 5th right intercostal space, sounds can be heard coming from the
tricuspid valve
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All of the following are important for returning blood to the heart except:
the hydrostatic blood in the arterial side
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In an ECG pattern the P wave is caused by
depolarization of atrial muscle fibers
-
with a stethoscope placed on the 2nd left intercostal ace, sounds can be heard coming from the
pulmonary semilunar valve
-
The semilunar valves are
aortic and the pulmonary valves
-
Arterial blood pressure depends on a variety of factors; increase in the blood pressure could be due to:
Increase in the blood volume and heart rate
-
The normal pacemaker of the heart is the
sinoatrial node (SAN)
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The right atrium receives blood directly from the
superior vena cava, inferior vena cava, and coronary sinus only
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The blood pressure in the systemic arteries is greatest during
ventricular systole
-
When a persons' pulse is taken by palpation near the thumb on
radial artery
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