Chapter 15: Circulation of Blood

Which of the following is not a characteristic of a vein? a. It carries blood back to the heart. b. It has valves to prevent the backflow of blood. c. It can serve as reservoirs for blood. d. All of the above are characteristics of veins.

All of the above are characteristics of veins.

Which of the following is not true of hepatic portal circulation? a. It receives blood from the stomach, spleen, and intestine. b. The blood passes through a second capillary bed. c. It allows the liver to detoxify the blood. d. All of the above are true of hepatic portal circulation.

All of the above are true of hepatic portal circulation.

This type of shock is caused by an acute allergic reaction. a. Neurogenic shock b. Anaphylactic shock c. Septic shock d. Cardiogenic shock

Anaphylactic shock

This structure in fetal circulation connects the aorta and the pulmonary artery. a. Umbilical artery b. Foramen ovale c. Ductus venosus d. Ductus arteriosus

Ductus arteriosus

This structure in fetal circulation shunts blood away from the immature liver. a. Umbilical artery b. Foramen ovale c. Ductus venosus d. Ductus arteriosus

Ductus venosus

Which of the following is not a mechanism that moves venous blood back to the heart? a. Contraction of skeletal muscles b. Changing pressure in the chest cavity during breathing c. Increasing the viscosity of the blood d. All of the above are mechanisms that move venous blood back to the heart.

Increasing the viscosity of the blood

Which of the following is not a characteristic of an artery? a. It carries blood away from the heart. b. It has valves to prevent the backflow of blood. c. It has a thicker tunica media than veins. d. All of the above are characteristics of arteries.

It has valves to prevent the backflow of blood.

This type of shock is caused by an imbalance in the autonomic stimulation of smooth muscles in vessel walls. a. Neurogenic shock b. Anaphylactic shock c. Septic shock d. Cardiogenic shock

Neurogenic shock

This blood vessel receives blood from the left ventricle. a. The pulmonary artery b. The pulmonary vein c. The aorta d. The inferior vena cava

The aorta

This blood vessel returns blood to the right atrium. a. The inferior vena cava b. The pulmonary arteries c. The pulmonary veins d. The hepatic veins

The inferior vena cava

This blood vessel receives blood from the right ventricle. a. The pulmonary artery b. The pulmonary vein c. The aorta d. The inferior vena cava

The pulmonary artery

This blood vessel returns blood to the left atrium. a. The pulmonary artery b. The pulmonary vein c. The superior vena cava d. The aorta

The pulmonary vein

Which of the following is not true of the blood vessels in the umbilical cord? a. There are two umbilical arteries. b. There is one umbilical vein. c. The umbilical arteries carry oxygen-rich blood. d. All of the above are true of the blood vessels in the umbilical cord.

The umbilical arteries carry oxygen-rich blood.

A section of an artery that has become abnormally wide because of a weakening of the arterial wall is called a. an aneurysm. b. necrosis. c. arteriosclerosis. d. ischemia.

an aneurysm.

Microscopic vessels that carry blood from small arteries to small veins are a. arterioles. b. venules. c. capillaries. d. portal circulatory systems.

capillaries.

Capillaries are unique because their structure includes only a. the tunica intima. b. the tunica intima and the tunica media. c. the tunica intima and the tunica externa. d. None of the above is correct because all blood vessels have all three layers in their structure.

the tunica intima.

The layer of blood vessels that is made up of connective tissues fibers to reinforce the blood vessel wall is the a. tunica media. b. tunica intima. c. tunica externa. d. tunica intermedia

tunica externa.

The layer of blood vessels that is made up of a single layer of squamous epithelium is the a. tunica media. b. tunica intima. c. tunica externa. d. tunica intermedia.

tunica intima.

The layer of blood vessels that contains smooth muscle is the a. tunica media. b. tunica intima. c. tunica externa. d. tunica intermedia.

tunica media.

This structure in fetal circulation shunts blood directly from the right atrium to the left atrium. a. Umbilical artery b. Foramen ovale c. Ductus venosus d. Ductus arteriosus

Foramen ovale