1. The buildup of plaque in the walls of arteries and the narrowing of passages through which blood can flow results in

A) Anemia
B) leukemia
C) atherosclerosis
D) cancer

2. White blood cells play an important role in

A) carrying oxygen
B) fighting infections
C) blood clotting
D) hemoglobin transport

3. Which of the following can cause anemia?

A) mineral deficiency
B) some types of cancer
C) excessive blood loss
D) A & B
E) A, B & C

4. Plasma consists mostly of

A) white blood cells
B) red blood cells
C) dissolved salts such as sodium
D) water

5. Which of the following is correct for a blood pressure reading of 120/80?

A) the systolic pressure is 80; the diastolic pressure is 120
B) the systolic pressure is 120; the diastolic pressure is 80
C) the diastolic pressure is 120; pulse is 80 beats per minute
D) the systolic pressure is 80; pulse is 120 beats per minute

6. Blood pressure is lowest in

A) capillaries
B) arteries
C) veins
D) arterioles

7. Briefly explain how the structure of capillary walls is well suited to function. [2 pts]

8. Damage to the SA (sinoatrial) node in humans

A) is a major contributor to heart attacks
B) would disrupt the normal rhythm cardiac contractions
C) results in a terminal disease
D) would result in oxygen poor blood

9. The circulation system in humans and other mammals is referred to as a “double circulation system”. This term refers to

A) the presence of two hearts
B) the presence of four heart chambers
C) the pulmonary circuit
D) the systemic circuit
E) the pulmonary and systemic circuits

10. Which of the following would be the correct path of blood flow as it returns from the lungs, flows through the heart and toward the body?

A) pulmonary vein → left atrium → left ventricle → aorta
B) pulmonary vein → right atrium → right ventricle → aorta
C) pulmonary artery → left atrium → left ventricle → aorta
D) pulmonary artery → right atrium → right ventricle → aorta

11. The role of the lymphatic system is to

A) fight infection in the body only
B) return tissue fluid to the circulatory system only
C) produce hormones that regulate the immune system
D) fight infection in the body and return tissue fluid to the circulatory system
E) fight infection in the body and produce hormones that regulate the immune system

12. Which of the following play a role in preventing infection?

A) healthy skin
B) mucus membranes such as those found in the respiratory tract
C) tears
D) A & B
E) A, B & C