Chapter 23

From the left ventricle, oxygen-rich blood flows through the A. pulmonary vein. B. aorta. C. superior vena cava. D. pulmonary artery.

B. aorta.

Oxygen-poor blood is carried from the heart of a mammal to the lungs via the A. pulmonary arteries. B. superior vena cava. C. pulmonary veins. D. inferior vena cava.

A. pulmonary arteries.

In humans, which blood vessels have valves? A. veins B. arteries in the neck C. capillaries D. arterioles

A. veins

Which of the following statements about mammalian circulatory systems is false? A. The left side of a mammal's heart sends blood to the lungs. B. The pulmonary circuit carries blood between the heart and the lungs. C. Mammals have two atria and two ventricles in their hearts. D. The systemic circuit carries blood between the heart and the rest of the body.

A. The left side of a mammal's heart sends blood to the lungs.

Arteries are distinguished from veins based on all of the following features except the A. amount of oxygen present in the blood. B. direction of blood flow relative to the heart. C. structure of their walls. D. blood pressure pushing against the walls of the vessels.

A. amount of oxygen present in the blood.

During which phase of the heartbeat do the ventricles fill with blood? A. diastole B. systole

A. diastole

Which blood vessels have the thinnest walls? A. arterioles B. veins C. capillaries D. venules

C. capillaries

What type of blood vessel is solely responsible for exchange between the blood and the interstitial fluid? A. venule B. artery C. capillary D. arteriole

C. capillary

As blood moves away from the heart toward the tissues, the relative size of blood vessels ________, the blood pressure ________, and the velocity of blood flow ________. A. decreases; decreases; increases B. increases; decreases; decreases C. decreases; decreases; decreases D. decreases; increases; increases

C. decreases; decreases; decreases

During ventricular systole, the semilunar valves ________ and the AV valves ________. A. close; open B. close; close C. open; close D. open; open

C. open; close

The liquid part of blood is called A. water. B. serum. C. plasma. D. interstitial fluid.

C. plasma.

Blood is pumped from the heart to the lungs by the A. left ventricle. B. left atrium. C. right ventricle. D. right atrium.

C. right ventricle.

Which of the following animals has a single circuit of blood flow and two heart chambers? A. squirrel B. salamander C. salmon D. snake

C. salmon

Which of the following is a function of the circulatory system? A. governing nutrient concentration in the blood B. mounting a response to invading microorganisms C. transporting nutrients to body cells D. transporting nerve impulses throughout the body

C. transporting nutrients to body cells

In mammals, which of the following vessels transports oxygenated blood from the lung back to the heart? A. pulmonary artery B. superior vena cava C. coronary artery D. pulmonary vein

D. pulmonary vein

In mammals, blood returning from the head will pass through the ________ just before entering the right atrium. A. left atrium B. inferior vena cava C. aorta D. superior vena cava

D. superior vena cava