AP CIRCULATION QUIZ
1. Cnidaria and flatworms exchange gases and remove wastes by way of their
a. Open circulatory system.
b. Closed circulatory system.
c. Gastrovascular system.
d. Moist skin surfaces.
e. Respiratory and excretory systems.
2. When you step on a cockroach or smash a fly, there is no red blood because
a. The blood is enclosed in a closed circulatory system.
b. It is too small to have circulatory organs at all.
c. It is too small to require oxygen for respiration.
d. The blood is a colorless hemolymph that does not carry oxygen.
e. The blood is actually a colorless hemolymph that carries oxygen on
molecules other than reddish hemoglobin.
3. “Artery” and “vein” are defined by whether they leave or enter the heart. If they
were defined by whether they carried oxygenated or deoxygenated blood, we
would have to change the name(s) of
a. the hepatic portal vein to a hepatic portal artery.
b. The hepatic and renal systems; they would have to be switched.
c. The pulmonary artery and vein; they would have to be switched.
d. The coronary artery and vein; they would have to be switched.
e. Non, since the aorta and vena cava do not have “artery” and “vein in their
name.
4. The vessels in our circulatory system that allow molecules to diffuse across to
tissues are
a. Arteries.
c. capillaries.
e. venules.
b. veins.
d. lymph vessels.
5. The coronary circulation serves the
a. Intestine and liver.
c. lungs.
b. Brain.
d. heart.
e. urinary tract.
6. Which statement is NOT true about human red blood cells?
a. They are biconcave disks that lack nuclei.
b. They are mainly produced in the liver.
c. Their normal life span is about 120 days.
d. Hemoglobin is a protein that binds oxygen loosely to transport it.
e. There are about 4-6 million red blood cells per cubic millimeter of whole
blood.
7. Which of the following blood components would interfere with the functioning of
an open circulatory system but NOT a closed one?
a. Electrolytes
c. red blood cells
e. antibodies
b. Water
d. amino acids
8. Which one of the following animals would have the highest heart rate?
a. Rat
b. cat
c. human
d. horse
e. elephant
9. Most of the carbon dioxide carried by the blood in humans is carried as
a. Bicarbonate ions in the plasma.
b. CO2 attached to hemoglobin.
c. Carbonic acid in the erythrocytes.
d. CO2 dissolved in the plasma.
e. Bicarbonate attached to hemoglobin.
10. What is the reason why fluid is forced out of systemic capillaries at the arteriolar
end?
a. The osmotic pressure of the interstitial fluid is greater than that of the
blood.
b. The hydrostatic pressure of the blood is less than that of the interstitial
fluid.
c. The hydrostatic pressure of the blood is greater than the osmotic pressure
of the interstitial fluid.
d. The osmotic pressure of the interstitial fluid is greater than the hydrostatic
pressure of the blood.
e. The osmotic pressure of the blood is greater than the hydrostatic pressure
of the interstitial fluid.
11. Which of the following is FALSE concerning the hemoglobin molecule?
a. It contains amino acids.
b. It contains iron.
c. It is composed of four polypeptide chains.
d. It can bind four O2 molecules.
e. It is found in humans only.
Use the following diagram for questions 12 – 14.
12. Chambers or vessels that carry oxygenated blood include which of the following?
a. 1 and 2 only
c. 5 and 6 only
e. 3,5, and 6
b. 3 And 4 only
d. 1,2, and 4
13. Blood is carried directly to the lungs from which of the following?
a. 2
b. 3
c. 4
d. 5
e. 6
14. The CORRECT sequence of blood flow, beginning at the pulmonary artery and
passing through the systematic circulation, is
a. 2-1-4-systematic-3-6-5.
b. 3-6-5-systematic-4-1-2.
c. 4-5-6-3-systematic-2-1
d. 4-6-3-systematic-2-1-5.
e. 5-6-3-systematic-2-1-4-3.
15. Which of the following sequences does NOT indicate a DIRECT pathway that
blood might follow in mammalian circulation?
a. Left ventricle  aorta
b. Right ventricle  pulmonary vein
c. Pulmonary vein  left atrium
d. Vena cava  right atrium
e. Right ventricle  pulmonary artery
16. Which of the following are the only vertebrates in which blood flows directly
from respiratory organs to body tissues without first returning to the heart?
a. amphibians
c. fishes
e. reptiles
b. Birds
d. mammals
17. Which of the following is CORRECT for blood pressure of 130/80?
I.
The systolic pressure is 130.
II.
The diastolic pressure is 80
III.
The blood pressure during heart contraction is 80.
a. I only
b. III only
c. I and II only
d. II and III only
e. I, II, and III
18. The meshwork that forms the fabric of a blood clot mostly consists of which
protein?
a. fibrinogen
c. thrombin
e. collagen
b. fibrin
d. prothrombin
19. Human plasma proteins include which of the following?
I. fibrinogen
a. I only
b. II only
II. hemoglobin
c. I and III only
d. II and III only
III. immunoglobulin
e. I, II, and III
For questions 20 - 22, refer to the following answers.
a. low-density lipoproteins
b. immunoglobulins
c. erythropoietin
d. epinephrine
e. platelets
20. speeds up heart rate
21. stimulates the production of red blood cells
22. an early participant in the clotting process
23. If the atrioventricular node could be surgically removed from the heart without
disrupting signal transmission to the Purkinje fibers,
a. no apparent effect on heart activity would be observed.
b. the heart rate would be decreased.
c. only the ventricles would contract.
d. only the atria would contract.
e. atria and ventricles would contract at about the same time.
24. Average blood pressure is lowest in
a. The aorta.
c. arterioles.
b. Arteries.
d. capillaries.
e. veins
25. Plasma proteins in humans have many functions. Which of the following is NOT
one of these functions?
a. Maintenance of blood osmotic pressure
b. Transport of water-insoluble lipids
c. Blood clotting
d. Immune responses
e. Oxygen transport
26. Which of the following is NOT a normal event in the process of blood clotting?
a. Production of erythropoietin
b. Conversion of fibrinogen to fibrin
c. Activation of prothrombin to thrombin
d. Adhesion of platelets
e. Clotting factor release by clumped platelets
27.Organisms in which a circulating body fluid is distinct from the fluid that directly
surrounds the body’s cells are likely to have
a. an open circulatory system
b. a closed circulatory system
c. a gastrovascular cavity
d. gills.
28.To adjust blood pressure independently in the capillaries of the gas-exchange
surface and in the capillaries of the general body circulation, an organism would need
a. An open circulatory system.
b. A hemocoel.
c. A lymphatic system.
d. A two-chambered heart.
e. A four-chambered heart.
29. Which is a CORRECT statement concerning the insect system?
a. Circulating fluid bathes tissues directly.
b. Blood is always contained in a system of tubes called tracheae.
c. Blood transports oxygen and nutrients to all the tissues.
d. There is no heart, pump.
e. There is no blood, or circulating fluid.
30.The sinoatrial node in humans
a. Delays the transmission in the cardiac conduction system after
the pacemaker has fired.
b. Is the valve between the left atrium and the left ventricle.
c. Is found in the lymphatic system.
d. Is the heart’s pacemaker.
e. Monitors blood pressure in the aorta.
31.Three-chambered hearts generally consist of the following numbers of
atria and ventricles:
a. One atrium; one ventricle; an accessory chamber.
b. Two atria; one ventricle.
c. Three atria; no ventricles.
d. No atria; three ventricles
e. One atrium; two ventricles.