Cardiovascular Quiz / Test on Etext Flashcards
Most simply stated, the major function of the cardiovascular system is ___
transportation
mediastinum, apex
The heart is located in the inferior _______ with its _______ pointed toward the left hip.
The heart is located in the inferior mediastinum with its apex pointed toward the left hip.
The layer of the heart that actually contracts is the _______.
- myocardium
- The layer of the heart that actually contracts is the myocardium.
The heart has _______ chambers and works as a _______ pump.
- four, double
- The heart has four chambers and works as a double pump.
The _______ anchor the flaps of the valves to the walls of the ventricles.
chordate tendineae
The tiny mass of cells that forms the pacemaker of the heart is called the _______.
- sinoatrial node
- The tiny mass of cells that forms the pacemaker of the heart is called the sinoatrial node.
The tiny mass of cells that forms the pacemaker of the heart is called the _______.
- sinoatrial node
- The tiny mass of cells that forms the pacemaker of the heart is called the sinoatrial node.
Blood that nourishes the heart is provided by the right and left _______.
coronary arteries
Heart muscle is also called _______.
myocardium
Which of the following do/does not ultimately drain into the inferior vena cava (IVC)?
Basilic vein
*Correct. This is a superficial vein, which drains the medial aspect of the arm and empties into the brachial vein, ultimately emptying into the superior vena cava (SVC).
blood pressure
this is the force exerted against blood vessel walls by the blood when the heart contracts or relaxes.
The product of the stroke volume and the heart rate is known as the _______.
cardiac output
The umbilical vein carries/passes _______.
oxygen and foods from the placenta to the fetus
At the arterial end of a capillary, blood pressure is _______ than osmotic pressure, and fluid flows _______ the capillary
more; out of
What portion of the ECG indicates ventricular repolarization?
T wave
You are not an athlete and you are not physically fit. If you suddenly partake in physical exercise, the increased demands of such vigorous exercise on your body are met primarily by _______.
a. all of the above - Answer
b. increased heart rate and blood volume
c. increased stroke volume
d. increased heart rate
e. increased blood volume
Compared to an artery, the wall of a vein differs in which of the following ways?
- The middle tunic is thin.
* Correct. The middle coat, or tunica media, is thick in an artery and thin in a vein.
What unique feature connects the anterior and posterior blood supplies of the brain, providing more than one route for blood to reach brain tissue in a given area?
Circle of Willis
Which is the correct order of events regarding operation of the atrioventricular (AV) valves?
1 - Ventricles contract, forcing blood against AV flaps
2 - As the ventricles fill, AV flaps hang limply into ventricles
3 - Blood returning to the atria puts pressure against AV valves, forcing them open..
4 - Chordae tendineae tighten, preventing valve flaps from everting into the atria.
5 - AV valves close
6 - Atria contract, forcing additional blood into ventricles.
Correct Order:
3-2-6-1-5-4
A fenestra or fenestration
-is an oval pore or opening, which is usually covered by a delicate membrane; a fenestra is more permeable than other regions of the plasma membrane of capillary wall cells.
Which of the following is NOT true during ventricular systole?
Semilunar valves close.
Which of the following is involved in anchoring the AV valve flaps to the walls of the ventricles?
Chordae tendineae
The ____ returns oxygen-poor blood to the right atrium from all body regions below the diaphragm.
Inferior vena cava
Blood exits the left ventricle in which of the following blood vessels?
Aorta
