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Respiratory / Circulatory Unit Multiple Choice
  • 1. These are tiny sacs in the lungs through which the exchange of oxygen and carbon dioxide takes place.
A) bronchi
B) alveoli
C) cilia
D) breathing
  • 2. The mechanical process of moving air into and out of the lungs; also called ventilation.
A) alveoli
B) breathing
C) cilia
D) respiration
  • 3. Tiny hairlike extensions of cells that line the respiratory tract. They move in a wavelike fashion to help eliminate dust and germs from the body.
A) alveoli
B) cilia
C) bronchi
D) breathing
  • 4. The amount of air the lungs can hold after taking as deep a breath as possible (the sum of vital capacity and residual volume).
A) total lung capacity
B) residual volume
C) breathing
D) vital capacity
  • 5. The total amount of air that a person can exhale after taking as deep a breath as possible.
A) residual volume
B) cilia
C) vital capacity
D) total lung capacity
  • 6. An organic chemical in which energy is stored and from which energy is released to meet the body’s needs.
A) calorie
B) cellular respiration
C) oxidation
D) ATP (adenosine triphosphate)
  • 7. A unit of heat energy. The amount of energy required to raise the temperature of 1 gram of water 1 degree Celsius.
A) calorie
B) cellular respiration
C) ATP (adenosine triphosphate)
D) oxidation
  • 8. The process by which glucose combines with oxygen to produce energy, carbon dioxide, and water.
A) cellular respiration
B) energy
C) calorie
D) ATP (adenosine triphosphate)
  • 9. A rapid form of oxidation that releases heat and, in many cases, light.
A) energy
B) combustion
C) ATP (adenosine triphosphate)
D) calorie
  • 10. The process by which substances combine with oxygen.
A) oxidation
B) calorie
C) energy
D) ATP (adenosine triphosphate)
  • 11. One of the two thin-walled upper chambers of the heart.
A) ventricle
B) atrium
C) aorta
D) villi
  • 12. The force exerted by blood against vessel walls.
A) pulse
B) blood pressure
C) calorie
D) atrium
  • 13. A transport system in which the fluid is confined within vessels.
A) open circulatory system
B) closed circulatory system
C) blood pressure
  • 14. A group of specialized cells in the right atrium of the heart that establish the basic rhythm of the heartbeat.
A) ventricle
B) valve
C) atrium
D) pacemaker
  • 15. The rhythmic expansion and recoil of arteries; initiated by the contractions of the ventricles of the heart.
A) valve
B) ventricle
C) pulse
D) villi
  • 16. A structure in the heart and some veins that prevents the blood from flowing backward.
A) valve
B) atrium
C) ventricle
D) villi
  • 17. One of the two thick-walled lower chambers of the heart; the pumping part of the heart.
A) villi
B) atrium
C) valve
D) ventricle
  • 18. When you inhale, your diaphragm
A) Moves down
B) Stays the same
C) None of the these
D) Moves up
  • 19. Risk factors for high blood pressure include all of these EXCEPT
A) Smoking
B) Obesity
C) Exercise
D) Excess cholesterol
  • 20. Which of the following statements best describes one step of gas exchange in the lungs?
A) Waste carbon dioxide passes into the bloodstream from the alveoli.
B) None of the these.
C) Waste carbon dioxide passes into the alveoli from the bloodstream.
D) Oxygen passes into the alveoli from the bloodstream.
  • 21. Which of the following DOES NOT happen during inhalation?
A) The pressure in the lungs decrease.
B) The diaphragm moves up.
C) Air moves into the lungs.
D) The ribs move upward and outward.
  • 22. The primary goal of cellular respiration is to release this from digested nutrients.
A) Carbon Dioxide
B) Water
C) Energy
D) Sugar
  • 23. What are the five main parts of the circulatory system?
A) heart, arteries, capillaries, blood and veins
B) arteriosclerosis, hypertension, heart attacks, edema and heart failure
C) pulmonary, systemic, lymphatic, circulatory and respiratory
D) oxygen, carbon dioxide, nitrogen, helium, and hydrogen
  • 24. The main functions of blood are to:
A) digest food and break it down to be used as energy
B) carry messages through all the body to direct body movement
C) carry messages to parts of cells to tell them how to develop
D) carry oxygen, nutrients, and wastes; fight disease; and regulate temperature
  • 25. Which of the following is NOT a respiratory disease?
A) SARS
B) asthma
C) emphysema
D) hypertension
  • 26. Oxygen-poor (carbon dioxide-rich) blood from the body returns to the heart's
A) left ventricle
B) right ventricle
C) left atrium
D) right atrium
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