This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Which of the following statements about alveolar pressure (Palv) during normal quiet breathing is ... (Read 69 times)

go.lag

  • Hero Member
  • *****
  • Posts: 667
on: Jul 16, 2018
Which of the following statements about alveolar pressure (Palv) during normal quiet breathing is true?
 
  a. It is positive during inspiration and nega-tive during expiration.
  b. It is the same as intrapleural pressure (Ppl).
  c. It is negative during inspiration and posi-tive during expiration.
  d. It always remains less than atmospheric pressure.

Question 2

Which of the following pressure gradients is responsible for maintaining alveolar inflation?
 
  a. Transpulmonary pressure gradient (Palv  Ppl)
  b. Transthoracic pressure gradient (Ppl  Pbs)
  c. Transcardiac pressure gradient (Pca  Palv)
  d. Transrespiratory pressure gradient (Palv  Pao)


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

coyin

  • Sr. Member
  • ****
  • Posts: 334
Reply #1 on: Jul 16, 2018
Answer to Question 1

ANS: C
During inspiration the pleural pressure drops, the transpulmonary pressure gradient widens, caus-ing the alveoli pressure to become sub-atmospheric and gas to enter the lung. During expiration the passive recoil of the lungs cause a supra-atmospheric pressure in the alveoli that causes gas to exit the lung.

Answer to Question 2

ANS: A
Transpulmonary or PL is the pressure difference that maintains alveolar inflation.


go.lag

  • Member
  • Posts: 667
Reply 2 on: Jul 16, 2018
Gracias!

bitingbit

  • Member
  • Posts: 323
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Hip fractures are the most serious consequences of osteoporosis. The incidence of hip fractures increases with each decade among patients in their 60s to patients in their 90s for both women and men of all populations. Men and women older than 80 years of age show the highest incidence of hip fractures.

Did you know?

Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.

Did you know?

The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.

Did you know?

A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.

Did you know?

About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.

A parish nurse checks the blood pressure of a church member A parish nurse checks the blood pressure of a church member
Mechanism involved in renal control of blood pressure Mechanism involved in renal control of blood pressure
Normal lung volumes and capacities. Normal lung volumes and capacities.
Adult Blood Pressure Guidelines Adult Blood Pressure Guidelines
Examples of Mission Statements Examples of Mission Statements
Normal and abnormal corneal light reflection test Normal and abnormal corneal light reflection test
Video: Membrane transport proteins - pores, gated channels and pumps

For a complete list of videos, visit our video library