What is the most commonly involved coronary artery in myocardial infarction (MI)?
Anonymous Quiz
42%
Right coronary artery (RCA)
41%
Left anterior descending artery (LAD)
13%
Left circumflex artery (LCA)
4%
Posterior descending artery (PDA)
An infant has a large ventricular septal defect (VSD). The defect is located in the upper section of the ventricular septum and is near the tricuspid and aortic valve. Based on this description, what type of ventricular septal defect is this?
Anonymous Quiz
27%
Inlet (atrioventricular)
50%
Membranous
10%
Muscular
12%
Outlet (conal or subarterial)
When an individual is in the upright position, which of the following is true regarding the ventilation-perfusion ratio at rest?
Anonymous Quiz
10%
It would be evenly distributed throughout the lung.
28%
Alveoli at the top of the lung tend to be over-perfused and under-ventilated.
62%
Alveoli at the bottom of the lung tend to be over-perfused and under-ventilated
👍1
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