In a normal individual, what is the oxygen cost of breathing as a ...

[lracut11]

In a normal individual, what is the oxygen cost of breathing as a percentage of the body's total oxygen consumption?
 
  a. 5
  b. 10
  c. 20
  d. 35

Question 2

Regional factors affecting the distribution of gas in the normal lung result in which of the fol-lowing?
 
  a. More ventilation goes to the apexes and lung periphery.
  b. More ventilation goes to the apexes and lung core.
  c. More ventilation goes to the bases and lung core.
  d. More ventilation goes to the bases and lung periphery.

[brittiany.barnes]

Answer to Question 1

ANS: A
The oxygen cost of breathing in healthy individuals averages from 0.5 to 1.0 ml of oxygen per liter of ventilation. Given a normal minute ventilation of 5 L/min, the oxygen cost of breathing would be 2.5 to 5 ml out of a total oxygen consumption of 250 ml/min. This represents less than 5 of the oxygen consumption of the body.

Answer to Question 2

ANS: D
In upright individuals, these factors direct more ventilation to the bases and periphery of the lungs.

[lracut11]

Gracias!

[amit]

Excellent