Exam 13: Cardiovascular System

Which of the following helps return blood to the heart?

What chamber of the heart pumps blood to the left lung?

In what type of blood vessel is the tunica media the thickest?

Venous pathways commonly connect in irregular networks and may have many unnamed tributaries.

What large blood vessel is formed by veins leaving digestive organs, such as the stomach, spleen, and intestines?

If the aortic baroreceptor senses an increased stretch of the aorta, how will the nervous system respond?

Capillary exchange of gases, nutrients, and waste is accomplished by diffusion, osmosis, and filtration.

What part of the conduction system fibers extend into the papillary muscles?

The innermost layer of the pericardial sac that also covers the surface of the heart is the parietal pericardium.

The atrioventricular (AV) node is responsible for starting the rhythmic contractions of the heart.

Which blood vessel type has the lowest blood pressure?

The __________ drains blood from the wall of the heart into the right atrium.

To examine blood flow through an area more closely, a radiologist can inject contrast dye into an artery for an angiogram. If the dye was injected into the internal carotid artery, the radiologist is trying to examine blood flow through what area of the body?

When taking a blood pressure, a vessel in the arm is occluded, and sounds of blood flow downstream are heard through a stethoscope placed on what vessel?

What part of the ECG pattern is due to depolarization of the ventricles?

The endocardial layer of the heart wall is the innermost layer and is in direct contact with the blood.

All venous blood returns to the heart through the superior or inferior vena cava.

Blood that is pumped from the right ventricle passes through the aortic valve.

When the blood pressure increases, veins function as blood reservoirs and respond by constricting their walls.

What layer of the heart wall is mostly cardiac muscle tissue?