« previous next »

Author Question: In what portion of the lungs does alveolar dead space normally occur? a. Apexes b. Bases c. ... (Read 74 times)

mynx

  • Hero Member
  • *****
  • Posts: 555
on: Jul 16, 2018
In what portion of the lungs does alveolar dead space normally occur?
 
  a. Apexes
  b. Bases
  c. Middle portions of the lungs
  d. Terminal respiratory units

Question 2

Which is the correct formula to calculate the alveolar minute ventilation of a spontaneously breathing subject?
 
  a. f  VDS/VT
  b. f  VT
  c. f  (VT  VDSphys)
  d. f  (VT + VDSphys)


micaelaswann

  • Sr. Member
  • ****
  • Posts: 314
Reply #1 on: Jul 16, 2018
Answer to Question 1

ANS: A
In the normal upright subject at rest, alveoli at the apexes of the lungs have minimal or no perfu-sion, and thus contribute to the total volume of dead space ventilation.

Answer to Question 2

ANS: C
Physiologic dead space includes both the normal and abnormal components of wasted ventila-tion. VDphy is the preferred clinical measure of ventilation efficiency. Measuring VDphy more accu-rately assesses alveolar ventilation.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

mynx

  • Hero Member
  • *****
  • Posts: 555
Reply #2 on: Jul 16, 2018
Thank you :)


micaelaswann

  • Sr. Member
  • ****
  • Posts: 314
Reply #3 on: Jul 16, 2018
Happy to help you


« previous next »
 

Did you know?

Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.

Did you know?

When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).

Did you know?

Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.

Did you know?

Excessive alcohol use costs the country approximately $235 billion every year.

Did you know?

Elderly adults are at greatest risk of stroke and myocardial infarction and have the most to gain from prophylaxis. Patients ages 60 to 80 years with blood pressures above 160/90 mm Hg should benefit from antihypertensive treatment.

Changes that occur during an action potential. Changes that occur during an action potential.
Because of the hazards of a vacuum, astronauts must wear a pressurized space suit while outside thei Because of the hazards of a vacuum, astronauts must wear a pressurized space suit while outside thei
Hip Typically occurs as a result of a fall; with osteoporosis, hip fractures can occur as a result o Hip Typically occurs as a result of a fall; with osteoporosis, hip fractures can occur as a result o
A 1998 false-colour near-infrared image of Uranus showing cloud bands, rings, and moons obtained by A 1998 false-colour near-infrared image of Uranus showing cloud bands, rings, and moons obtained by
Joseph Moore and His Family (1839), by Erastus Salisbury Field, reflects the emerging middle-class f Joseph Moore and His Family (1839), by Erastus Salisbury Field, reflects the emerging middle-class f
Hubble Space telescope Hubble Space telescope
Video: Red Blood Cells - Erythropoietin (EPO)

For a complete list of videos, visit our video library