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Human Respiratory System Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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Question 1 1. Contraction of which muscle results in inspiration?

Question 2 2. During gas exchange _____ moves into the blood and _____ out of the blood across the respiratory membrane in the lungs. 

Question 3 3. Homeostasis can be defined as _____.

Question 4 4. The gas exchange in metabolizing tissues is known as _____.

Question 5 5. As we climb a mountain, the atmospheric pressure _____ and this makes it _____ to breath and obtain oxygen.

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Question 6 6. Even though carbon dioxide is a cellular waste product, it is converted through a reaction with water to create bicarbonate. The bicarbonate then performs an important role after it diffuses back into the plasma. What is it?

Question 7 7. Through the same reaction that forms bicarbonate, something else is produced. What is it and how is it utilized?

Question 8 8. Which molecule decreases surface tension and thus makes ventilation possible?

Question 9 9. Carbon dioxide is a waste product created during ATP synthesis. As it is being transported from our tissues back to the lungs, some of it is dissolved in plasma, the rest is converted and transported as other substances. Most of the carbon dioxide is converted into which of these substances?

Question 10 10. Which of the following best explains how 2,3-BPG works to help unload oxygen from hemoglobin?

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Question 11 11. Identify the molecule to which oxygen binds within red blood cells.

Question 12 12. What is transpulmonary pressure?

Question 13 13. Consider the receptors that are part of the homeostatic system for regulation of ventilation. Which of the following are the central chemoreceptors sensitive to?

Question 14 14. Which of the following events occurs first during inspiration?

Question 15 15. The partial pressure of the gases we breathe in from the air is the pressure contributed by a single gas in a mixture of multiple gases. The partial pressure of a gas is _____ to the concentration of the gas.

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Question 16 16. Carbon dioxide is a cellular waste product that our bodies remove though _____.

Question 17 17. What is the integration center for the homeostatic regulation of ventilation?

Question 18 18. The upper respiratory system includes the mouth, nose and _____.

Question 19 19. Which of the following is NOT true concerning ventilation?

Question 20 20. At high temperatures hemoglobin unloads oxygen; this means that at high temperatures the affinity of hemoglobin for oxygen _____.

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Question 21 21. Which of the following is true about transpulmonary pressure?

Question 22 22. Consider the following mixture of gases: 20% oxygen, 40% carbon dioxide, and 40% nitrogen. If the total pressure is 1000 mmHg, then what is the partial pressure of oxygen?

Question 23 23. High carbon dioxide levels in the blood or _____ can stimulate ventilation in a healthy person.

Question 24 24. Which of the following best explains why someone may experience shortness of breath on top of a mountain?

Question 25 25. Why does the process of gas exchange need to be efficient?

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Question 26 26. What would be the symptoms of low levels of hemoglobin?

Question 27 27. Which of the following is the best description of blood leaving the metabolizing tissues and returning to the lungs?

Question 28 28. Oxygen is transported in the blood bound to a protein called _____.

Question 29 29. Water has a high surface tension; this means that it can _____.

Question 30 30. Oxygen must first be dissolved in the _____ before it can enter the red blood cell and be transported throughout the body.

Human Respiratory System Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next question. You can skip questions if you would like and come back to them later with the "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. You will lose your work if you close or refresh this page. Good luck!

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