Get Ready For A Quick Cardiovascular System Quiz!

1. The umbilical cord has a vein that carries:

Nutrients and oxygen rich blood to the baby

Wastes from the mom

Carbon dioxide and metabolic materials to the baby

The umbilical cord carries nutrients and oxygen-rich blood to the baby. This is essential for the baby's growth and development as it provides the necessary nourishment and oxygen for the baby's cells and organs to function properly. The umbilical cord acts as a lifeline between the mother and the baby, allowing the transfer of these vital substances from the mother's bloodstream to the baby's bloodstream.

Explanation

The umbilical cord carries nutrients and oxygen-rich blood to the baby. This is essential for the baby's growth and development as it provides the necessary nourishment and oxygen for the baby's cells and organs to function properly. The umbilical cord acts as a lifeline between the mother and the baby, allowing the transfer of these vital substances from the mother's bloodstream to the baby's bloodstream.

2. The muscular layer of the heart that is responsible for pumping is the:

Endocardium

Epicardium

Myocardium

the endocardium is the internal lining; the epicardium is the external surface.

Explanation

the endocardium is the internal lining; the epicardium is the external surface.

3. What part of the intrinsic conduction system starts the heart beat?

The atrioventricular node

The Bundle of His

The Perkinje fibers

The sino-atrial node

the correct sequence is sinoatrial node, atrioventricular node, Bundle of His, Purkinje fibers.

Explanation

the correct sequence is sinoatrial node, atrioventricular node, Bundle of His, Purkinje fibers.

4. This chamber of the heart is much thicker than the others because it pumps to the entire body:

Right atrium

Right ventricle

Left atrium

Left ventricle

the right side of the heart pumps to the lungs; the atria receives blood

Explanation

the right side of the heart pumps to the lungs; the atria receives blood

5. Which would be indicative of hypotension?

120/80

170/120

80/65

120/80 is normal.

Explanation

120/80 is normal.

6. Why is the mitral valve different from the other three valves of the heart?

It only has 1 flap

It only has 2 flaps

It only has 3 flaps

The correct answer is that the mitral valve only has 2 flaps. Unlike the other three valves of the heart, which typically have three flaps, the mitral valve is unique in having only two flaps. This difference in the number of flaps contributes to the distinct structure and function of the mitral valve, allowing it to regulate the flow of blood between the left atrium and left ventricle of the heart.

Explanation

The correct answer is that the mitral valve only has 2 flaps. Unlike the other three valves of the heart, which typically have three flaps, the mitral valve is unique in having only two flaps. This difference in the number of flaps contributes to the distinct structure and function of the mitral valve, allowing it to regulate the flow of blood between the left atrium and left ventricle of the heart.

7. You can check the pulse n your neck using the:

Brachial artery

Jugular vein

Carotid artery

Popliteal vein

pulse is taken in an artery, brachial in the arm

Explanation

pulse is taken in an artery, brachial in the arm

8. The correct pathway that an erythrocyte would travel during systemic circulation is:

Arteriole--aorta--vein--venule--capillary

Capillary--venule--vein--artery--aorta

Aorta--arteriole--capillary--venule--vein

Venule--vein--capillary--arteriole--aorta

aorta leaves the heart, arteries away from the heart to capillaries, venules leave the capillaries and veins to the heart.

Explanation

aorta leaves the heart, arteries away from the heart to capillaries, venules leave the capillaries and veins to the heart.

9. The softer "dupp" sound of the heart is from:

The closing of the atrioventricular valve

The closing of the semilunar valve

The opening of the semilunar valve

The softer "dupp" sound of the heart is produced by the closing of the semilunar valve. This valve is located between the ventricles and the major arteries leaving the heart. When the ventricles relax and blood starts to flow back towards the heart, the semilunar valve closes to prevent the backflow of blood. This closure creates the softer sound known as the second heart sound or "dupp". The closing of the atrioventricular valve, on the other hand, produces the first heart sound or "lubb".

Explanation

The softer "dupp" sound of the heart is produced by the closing of the semilunar valve. This valve is located between the ventricles and the major arteries leaving the heart. When the ventricles relax and blood starts to flow back towards the heart, the semilunar valve closes to prevent the backflow of blood. This closure creates the softer sound known as the second heart sound or "dupp". The closing of the atrioventricular valve, on the other hand, produces the first heart sound or "lubb".

10. You can tell when you cut a vein because the blood:

Flows

Spurts

Will not come out

Is blue

blood is never blue! arteries spurt and if you it a vessel, you will bleed.

Explanation

blood is never blue! arteries spurt and if you it a vessel, you will bleed.

11. A surgeon opens the thoracic cavity and finds a membrane covering the mediastinum. This membrane is called the:

Visceral pericardium

Parietal pericardium

Visceral peritoneum

Parietal peritoneum

the peritoneum is found in the abdomen; the visceral membranes are found on the surface of structures.

Explanation

the peritoneum is found in the abdomen; the visceral membranes are found on the surface of structures.

12. The vessel layer that is fibrous and responsible for support is the:

Tunica externa

Tunica intima

Tunica media

The tunica externa is the correct answer because it is the outermost layer of blood vessels and is composed of fibrous connective tissue. This layer provides strength and support to the vessel, helping to maintain its shape and integrity. The tunica externa also contains blood vessels that supply nutrients to the vessel wall.

Explanation

The tunica externa is the correct answer because it is the outermost layer of blood vessels and is composed of fibrous connective tissue. This layer provides strength and support to the vessel, helping to maintain its shape and integrity. The tunica externa also contains blood vessels that supply nutrients to the vessel wall.