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W. Crone (303 FTZ, 629-7439, cronewil@hvcc.edu, http://www.hvcc.edu/academ/faculty/crone/index.html)

WEEK 9: THURSDAY, MARCH 16, 7:50 - 9:55 AM. Bring sharpened #2 pencils.

This second lecture exam will cover the lecture/text material for weeks 6 through 9 (to complete through the renal and electrolytes section, or as least as much as we get through the Monday before in lecture!). It will be based on lectures discussed/touched on in lecture, although your understanding should be enhanced by your readings in the texts. Note that you will have two hours--given that Microbiology 03024 follows at 10 AM, you won't have"open-ended" time to finish the test!


30 multiple choice questions

worth two points each

60 points possible

6 short essay questions

worth fifteen points each

90 points possible

total possible for test

150 points possible

Weeks (6 and 7): Pulmonary System

Weeks (8 and 9): Renal System and Electrolytes

As you saw with the first physiology test, I intend to have the multiple choice questions to be thought-provoking. Problem-solving is at the heart of physiology as a discipline. If you know the material at the level of we're discussing it during lecture and recitation, you should be able to answer them. Examples from last year's test follow, with the answers at the bottom of the next page.

1. Lungs and airways that are inflated at birth normally do not collapse again because of all of the following except:

  1. cartilages and connective tissues hold the airways open
  2. surfactant prevents the alveoli from collapsing
  3. negative intrathoracic pressure prevents total elastic recoil of the lungs
  4. the lungs are compliant and a small amount of pressure will keep them inflated
  5. physiologic shunting of blood towards underventilated alveoli stimulates expansion


2. If the blood lacked red blood cells but the lungs were functioning normally,

  1. the arterial PaO2 would be normal
  2. the oxygen content of arterial blood would be normal
  3. both A and B would apply
  4. neither A nor B would apply


3. Increasing alveolar ventilation increases the blood pH because:

  1. it activates neural mechanisms that remove acid from the blood
  2. it makes hemoglobin a stronger acid
  3. it increases the PaO2 of the blood
  4. it decreases the PACO2 of the alveoli
  5. the increased muscle work of increased breathing generates more CO2.


4. The following renal function data were obtained for the substance"Ewerhea:"

urine flow rate: 90 ml/hr

urine concentration of ewerhea: 480 mg/ml

plasma concentration of ewerhea: 6 mg/ml

What is the clearance of ewerhea?

  1. 12 ml/min
  2. 100 ml/min
  3. 120 ml/min
  4. 240 ml/min
  5. 480 ml/min


5. Which of the following sets of lab values would be most consistent with a diagnosis of central (i.e., pituitary-based) diabetes insipidus? urine osmolality; flow rate

  1. 50 mOsm/kg H20, 18 L/day
  2. 50 mOsm/kg H20, 1.5 L/day
  3. 300 mOsm/kg H20, 1.5 L/day
  4. 300 mOsm/kg H20, 18 L/day
  5. 1,200 mOsm/kg H20, 0.5 L/day


answers: 1-E, 2-A, 3-D, 4-C, 5-A

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Please send comments and questions to: cronewil@hvcc.edu


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This web site last updated on March 14, 2000