Sample Midterm Questions 09

# Sample Midterm Questions 09 - MCB32 Sample Midterm F09 1...

This preview shows pages 1–5. Sign up to view the full content.

MCB32 Sample Midterm F09 1. Carbon dioxide diffuses from blood into lung in the: A. trachea B. bronchioles C. alveoli D. All of the above 2. Assume that air at the top of Mt Everest contains only the following gases: P O2 = 46 mm Hg P N2 = 180 mm Hg With the assumption that the air at the top of Mt Everest does not contain any water, what is the atmospheric pressure at the top of Mt Everest? A. 46 mm Hg B. 180 mm Hg C. 226 mm Hg D. Cannot determine from the information given Data below is for the next 2 questions. A chamber contains the following: 22% O 2 78% N 2 3. If the total pressure in the chamber is 730 mm Hg, what is the partial pressure of N 2 ? A. 150 mm Hg B. 159 mm Hg C. 570 mm Hg D. 730 mm Hg 4. The partial pressure of water at 37 o C is 47 mm Hg. If the chamber described above became saturated with water at 37 o C, what will the partial pressure of O 2 be? A. 47 mm Hg B. 150 mm Hg C. 178 mm Hg D. cannot determine from information given

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
5. The presence of surfactant on the inner surface of the alveoli will: A. increase surface tension B. prevent smaller alveoli from collapsing C. decrease CO 2 exchange D. increase the P CO2 in larger alveoli 6. The residual volume: A. is the amount of air expired in one breath B. is the amount of air left in the lungs after normal expiration C. is the amount of air left in the lungs after maximal expiration D. is the amount of air in the lungs after maximal inspiration 7. The partial pressure of CO 2 in the atmosphere just outside of this building is closest to? A. 0 mm Hg B. 47 mm Hg C. 159 mm Hg D. 40 mm Hg 8. Most O 2 in the body is: A. dissolved in plasma B. bound to hemoglobin C. in the form of HCO 3 - D. in the form of CO 2
9. Figure 1 shows two oxygen hemoglobin dissociation curves. The % O 2 saturation and the partial pressure of O 2 in the veins of an individual are described by point A. Which of the following has occurred if % O 2 saturation and the partial pressure of O 2 in the veins shift to the values described by point B. A. plasma pH levels have increased and oxygen consumption has increased B. body temperature has decreased and the plasma oxygen concentration has increased C. the plasma concentration of CO 2 has increased and oxygen consumption has increased D. less O 2 has been unloaded to the tissues 10. In Figure 2 which of the following best shows the change that occurs in the veins when a person is exercising? A. A to B B. A to C C. D to E D. D to B 11. Please explain your choice for question 10, above. 12. Which of the following will trigger hyperventilation? A. high plasma O 2 B. low plasma pH C. high plasma pH D. low plasma CO 2 13. As a result of hyperventilation a patient will have: A. hypercapnia B. hypocapnia C. high plasma O 2 D. high plasma H + concentration

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
14. Peripheral chemoreceptors that respond to pH are located in the: A. carotid and aortic bodies B. medulla oblongata C. rythymicity center
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 11

Sample Midterm Questions 09 - MCB32 Sample Midterm F09 1...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online