Cardiovascular Review Questions Flashcards
Which of the following statements is true?
A. The left ventricle wall is thinner than the right ventricle wall
B. The left ventricle pumps blood at a higher pressure than the right ventricle
C. The left ventricle pumps more blood with each beat than the right ventricle. Explain
B. The left ventricle pumps blood at a higher pressure than the right ventricle
Which anatomical or physiological feature correctly describes cardiac muscle and not skeletal muscle
❑Striations appear as alternating light and dark bands.
❑Sarcoplasmic reticulum stores and releases calcium ions.
❑Intercalated discs connect adjacent muscle cells.
❑Calcium ions bind troponin to signal contractions.
❑Intercalated discs connect adjacent muscle cells.
Why can’t cardiac muscle go into tetany?
Has a longer refractory period that is almost as long as a contraction
What happens when the ventricular pressure exceeds the aortic pressure?
❑The semilunar valves open.
❑The atrioventricular valves open.
❑The semilunar valves close.
❑The atrioventricular valves close.
❑The semilunar valves open.
Which cardiac term refers to the volume of blood remaining in a ventricle after contraction
◦ end diastolic volume
◦ end systolic volume
◦ cardiac reserve
◦ stroke volume
End systolic volume
Select the factor that increases cardiac output.
◦ Increased preload
◦ Increased parasympathetic activity
◦ Decreased venous return
◦ Decreased stroke volume
Increased preload
What problem of cardiac output might ensue if the heart beats too rapidly for an extended period? Why?
Tachycardia leading to decreased EDV, so is SV
and there is decreased filling time and not enough blood in there
The condition where fluid compresses the heart and limits its ability to contract is called ________.
A) pericarditis
B) cardiac tamponade
C) myocardial infarction
D) angina pectoris
B) cardiac tamponade
Which branch of the autonomic nervous system innervates blood vessels?
Sympathetic
Which layer of the blood vessel wall do these nerves innervate?
Tunica media
Which blood vessels lack elastic tissue?
A) muscular arteries and arterioles
B) venules and veins
C) capillaries and venules
D) arterioles and capillaries
C) capillaries and venules
Which factor is physiologically the most adjustable determinant of resistance in a vessel?
❑blood viscosity
❑red blood cell count
❑blood vessel diameter
❑increases resistance to blood flow.
Blood vessel diameter
Where in the systemic circuit does the steepest drop in blood pressure occur?
❑ arterioles
❑Capillaries
❑Venules
❑Veins
Arterioles
Which term refers to the lowest arterial blood pressure reached during the cardiac cycle?
❑ systolic pressure
❑Pulse pressure
❑Mean arterial pressure ❑Diastolic pressure
Diastolic pressure
A patient presents with high arterial blood pressure. Which of the following structures are
stimulated first as an attempt to control the rising pressure?
a. Baroreceptors
b. Vasomotor fibers
c. Cardioaccelerator center
d. Cardioinhibitory center
A. Baroreceptors
