Which is true of blood flow into the coronary arteries at rest?
Anonymous Quiz
18%
It is greatest during the systolic phase of the cardiac cycle.
54%
It is greatest during the diastolic phase of the cardiac cycle
28%
It is equivalent to approximately 20% of the cardiac output.
S2 represents the closure of?
Anonymous Quiz
12%
Aortic and Mitral valves
7%
Mitral and Pulmonic valves
76%
Aortic and Pulmonic valves
5%
Tricuspid and Aortic valves
Which of the following conditions can cause the extra heart sound S4?
Anonymous Quiz
31%
Fluid volume overload
8%
Fluid volume deficient
35%
Hypertrophic left ventricle
26%
Aortic regurgitation
Compared to the resting state, which is true of the cardiac cycle during exercise?
Anonymous Quiz
29%
Even though heart rate increases, systole and diastole remain the same.
22%
Systole remains the same but diastole decreases.
23%
Systole increases and diastole remains the same.
26%
Both systole and diastole decrease, but there is a greater decrease in diastole
The right ventricle pumps what type of blood up through the pulmonary artery?
Anonymous Quiz
7%
A. Oxygenated
81%
B. Deoxygenated
12%
C. Mixed
The ventricular muscles accepts impulses directly from
Anonymous Quiz
23%
AV node
12%
Bundle of His
20%
Right and left bundle branches
44%
Purkinje system
Rise in the carotid sinus pressure leads to
Anonymous Quiz
8%
reflex hypercapnia
6%
reflex hyperpnea
52%
reflex bradycardia
34%
reflex tachycardia
❤1
The umbilical cord is made up of two umbilical veins and one umbilical artery.
Anonymous Quiz
50%
True
50%
False
This about second heart sound is incorrect
Anonymous Quiz
28%
it is occasionally split
21%
it is due to the closure of semilunar valves
22%
indicates the commencement of diastole
30%
it has a longer duration than the first sound
The ______ carries oxygenated blood from the placenta to the fetus. Some of the blood flow from this structure is shunted from the __ to the ___ via the _______.
Anonymous Quiz
14%
umbilical artery, lungs, aorta, ductus arteriosus
62%
umbilical vein, liver, inferior vena cava, ductus venosus
15%
umbilical vein, liver, superior vena cava, ductus arteriosus
9%
umbilical artery, liver, inferior vena cava, ductus venosus
This is the reason why the SA node acts as heart’s pacemaker
Anonymous Quiz
3%
because it has a poor cholinergic innervations
11%
because it has a rich sympathetic innervations
40%
because of its capability of generating impulses
46%
because it generates impulses at the highest rate
The contraction phrase of the heart so blood can be pumped through the body’s system and lungs is known as?
Anonymous Quiz
7%
Diastole
86%
Systole
2%
Pericardial closure
4%
Repolarization
A small muscular ventricular septal defect has a high probability of self-closure, and these types of VSDs are found in the lower portion of the ventricular septum.
Anonymous Quiz
68%
True
32%
False
The 'Lub' sound of the heart's LUB DUB is caused by....
Anonymous Quiz
27%
Atria Contracting
51%
Ventricles Contracting
11%
Atria Relaxing
11%
Ventricles Relaxing
In fetal circulation the umbilical artery carries _____, while the umbilical vein carries ________.
Anonymous Quiz
30%
oxygenated blood , deoxygenated blood.
65%
deoxygenated blood , oxygenated blood.
5%
deoxygenated or oxygenated blood , oxygen blood.
Order the phases an action potential travels in the conduction system
Anonymous Quiz
7%
SA node--> AV bundle branches--> AV node--> Purkinje fibers
89%
SA node--> AV node--> AV bundle branches--> Purkinje fibers
2%
Av bundle branches--> AV node--> SA node--> Purkinje fibers
3%
Purkinje fibers--> SA node--> AV node--> AV bundle branches
The ductus arteriosus carries blood between which two structures?
Anonymous Quiz
12%
Aorta to subclavian artery
9%
Pulmonary veins to left atrium
66%
Pulmonary trunk to the aorta
13%
Umbilical veins to the IVC
❤2
The 'Dub' sound of the heart's LUB DUB? are the....
Anonymous Quiz
19%
Atrioventricular valves closing
59%
Semilunar Valves closing
14%
Blood flowing through the Pulmonary Trunk and Aorta
8%
Blood Flowing down into the venticles
What is a cause of the extra heart sounds known as S3?
Anonymous Quiz
21%
Atrial “kick” due to resistant ventricles caused by hypertrophic left ventricle
18%
Valves defects
13%
Mitral Stenosis
48%
Ventricle filling due to fluid volume overload or heart failure
What is the definition of the cardiac cycle?
Anonymous Quiz
1%
The contraction of the atria
20%
Circulation of the blood in the heart
9%
The contraction and relaxation of the ventricles
70%
It is a sequence of event that occurs during one complete heartbeat