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 34 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
Great answer, keep it coming :)

AmberC1996

  • Member
  • Posts: 317
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

In women, pharmacodynamic differences include increased sensitivity to (and increased effectiveness of) beta-blockers, opioids, selective serotonin reuptake inhibitors, and typical antipsychotics.

Did you know?

Patients who have undergone chemotherapy for the treatment of cancer often complain of a lack of mental focus; memory loss; and a general diminution in abilities such as multitasking, attention span, and general mental agility.

Did you know?

Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.

Did you know?

A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.

Did you know?

To combat osteoporosis, changes in lifestyle and diet are recommended. At-risk patients should include 1,200 to 1,500 mg of calcium daily either via dietary means or with supplements.

Normal glomerulus. Acute glomerulonephritis. Normal glomerulus. Acute glomerulonephritis.
PET scan of a normal brain. PET scan of a normal brain.
Measuring Blood Pressure Measuring Blood Pressure
Connections of a nitric acid plant, intermediate pressure type Connections of a nitric acid plant, intermediate pressure type
Pressure Changes in Pulmonary Ventilation Pressure Changes in Pulmonary Ventilation
The traditional human karyotypes derived from a normal female and a normal male The traditional human karyotypes derived from a normal female and a normal male
Video: Status Epilepticus

For a complete list of videos, visit our video library