« previous next »

Author Question: In what portion of the lungs does alveolar dead space normally occur? a. Apexes b. Bases c. ... (Read 61 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?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Did you know?

According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.

Did you know?

The types of cancer that alpha interferons are used to treat include hairy cell leukemia, melanoma, follicular non-Hodgkin's lymphoma, and AIDS-related Kaposi's sarcoma.

Did you know?

People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.

Did you know?

Addicts to opiates often avoid treatment because they are afraid of withdrawal. Though unpleasant, with proper management, withdrawal is rarely fatal and passes relatively quickly.

From space earth shows itself as a planet covered mostly by water. From space earth shows itself as a planet covered mostly by water.
Dried dead plants Dried dead plants
Lungs Anatomy Model Lungs Anatomy Model
Contested Space: Exclaves Contested Space: Exclaves
Create space between metatarsals by pulling sides of foot away from each other. Create space between metatarsals by pulling sides of foot away from each other.
Blood Supply to the Lungs Blood Supply to the Lungs
Video: HIV replication/ Replication cycle of HIV

For a complete list of videos, visit our video library