A&P Quiz 3 (Vacular)

Vasodilation controls blood pressure by:

• Increasing blood vessel resistance

• decreasing cardiac output

• decreasing blood vessel resistance

• increasing cardic output

Match each vascular structure to its function or characteristic.

• site for exchange of nutrients and oxygen

• Capillaries

• deliver blood to specific organs

• Distributing arteries

• center space of a blood vessel

• Large veins

• veins closest to heart

• Arteries

• blood vessels with the thickest walls

• Lumen

What mechanisms assist venous return?

• One-way valves, skeletal muscle contractions, pressure changes during breathing

• Skeletal muscle contractions, large-diameter lumen, thickness of the tunica media in medium-sized veins

• One-way valves, increasing diameter of veins, peripheral resistance

• Pressure changes during breathing, one-way valves, thickness of the tunica media in medium-sized veins

All systemic arteries arise, either directly or indirectly, from the:

• Aorta

• Subclavian Artery

• Circle of Willis

• Superior Vena Cava

This occurs when fluid filters out of the capillaries faster than it’s reabsorbed and accumulates in the tissues:

• Colloid osmotic pressure

• Edema

• Diffusion

• Varicosities

Which brain structure coordinates blood pressure control?

• Cerebellum

• Medulla

• Pons

• Midbrain

Where in the vascular system are the highest and the lowest pressures found?

• Left ventricle (highest), right atrium (lowest)

• Aorta (highest), capillaries (lowest)

• Large arteries (highest), small veins (lowest)

• Aorta (highest), vena cava (lowest)

When cardiac output increases, what happens to blood pressure?

• It doesn't change

• It increases

• It decreases

• It goes up, and then drops again

The hepatic portal system deposits blood from the ____ into the liver; it then returns it to the ____.

• Lungs; aorta

• Abdominal organs; inferior vena cava

• Superior vena cava; superior mesenteric cavity

• Stomach; superior vena cava

Baroreceptors are:

• Arterioles which help regulate blood pressure and control how much blood enters an organ

• The portion of blood vessels that adjust their diameter

• Sensory nerve endings in the aortic arch and carotid arteries that sense changes in pressure

•  Short vessels that connect arterioles to capillaries