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HPNU 3060 Cardiovascular Study Set Exam
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HPNU 3060 CardiovascularStudy Set Exam
The first steps in hemostasis involve ____________ and ______________. - Answer
vasoconstriction, platelet plug formation
In cardiac muscle, - Answer some of the calcium ion required for contraction comes
from outside of the cell.
The only blood vessels whose walls permit exchange between the blood and the
surrounding interstitial fluids are the - Answer capillaries.
The repolarization phase (after of the plateau phase) in a cardiac action potential is due
to the __________ of Ca2+ channels and __________ of K+ channels. - Answer closing,
opening
As the arterial system leaves the heart, the vessels (pick the most complete answer) -
Answer divide and branch, become less elastic and more muscular, and become
smaller in diameter
Compared to arteries, the velocity of flow of the blood through the capillaries is -
Answer much slower.
Calculate the stroke volume of a heart with an end diastolic volume of 145 ml and end
systolic volume of 60 ml. Report your value to the nearest whole ml. - Answer 85
All blood vessels are lined with a thin layer of - Answer endothelium.
The pulmonary artery carries _______________ blood _______________ the heart. - Answer
deoxygenated, away from
The second heart sound, "dup," is caused by the ___________ valves closing, as pressure
within the ventricles _____________ relative to the pressure in the arteries. - Answer
Semilunar, decreases
Blood flow to a tissue will increase if the - Answer level of carbon dioxide at the
surrounding tissue increases.
Myogenic autoregulation means that (pick the most complete answer) - Answer
stretched smooth muscle in a blood vessel constricts reflexively.
A P-wave represents the - Answer depolarization of the atria
According to Starling's law of the heart, the cardiac output is directly related to the -
Answer end diastolic volume/pressure
, Blood returns from the body into the heart where it then moves through the structures of
the heart and finally out into the systemic circulation. Place the following structures in
the order that the blood would pass through them.
1. right ventricle
2. left atrium
3. right atrium
4. pulmonary artery
5. left ventricle
6. pulmonary vein - Answer 3, 1, 4, 6, 2, 5
A normal adult hematocrit would be approximately __________%. - Answer 45
Each of the following changes will result in increased blood flow to a tissue except one.
Identify the exception. - Answer decreased vessel diameter
When sympathetic neurons have decreased to a new steady-state firing rate, blood
vessels are said to be vasodilated. This is an example of ___________ control. - Answer
Tonic
The steep repolarization phase of the action potentials of myocardial contractile cells is
due to which ion(s)? - Answer K+
A downward deflection on an ECG can represent - Answer depolarization and net
current movement toward the negative electrode
In adults, red blood cells are formed in - Answer red bone marrow.
Capillaries are best described as - Answer microscopic vessels in which blood
exchanges material with the interstitial fluid.
Which of the following will increase flow in a vessel the most? - Answer Increase in
radius by 1 unit
The integrating center for neural control of blood pressure resides in the - Answer
medulla oblongata
The purpose of having valves in the cardiovascular system is to - Answer ensure that
blood flows in the correct direction.
The rapid depolarization phase of the action potential in a myocardial contractile cells is
due to which ion(s)? - Answer Na+ entry
The depolarization of the pacemaker action potential spreads to adjacent cells through -
Answer gap junctions.
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