Can anyone help me with these answers? Having a hard time. 1. With respect to th

Question

Can anyone help me with these answers? Having a hard time.

1. With respect to the air taken into the lungs

a. All of the air that enters the lungs is available for gas exchange with the blood
b. Some of the inhaled air remains in the airwarys and is not available for gas exchange with the blood
c. While most gas exchange with the blood takes place in the alveoli, exchange does take place across the airway walls

2. What happens the the amount of fresh air entering the alveoli when the tidal volume declines?

a. Decreases
b. Increases
c. No change

3. Tidal Volume is

The amount of air in which gas exchange can take place in the lungs during one complete breath
The amount of air that flows in and out of the lungs in one complete breath
The amount of air that enters the airways but not the alveoli during one complete breath

4. If a body needs more oxygen, the breathing pattern can change to increase

Tidal volume
Breathing rate
Both tidal volume and breathing rate

5. Alveolar ventilation rate is

a. The amount of air in which gas exchange can take place in the lungs
b. The amount of air that flows in and out of the lungs in one complete breath
c. The amount of air that enters the airways but not the alveoli during one complete breath

6. Alveolar ventilation is a function of (check all that apply)

a. Tidal volume
b. Breathing rate
c. Dead space

7. On a proportional basis, which parameter changes the most during exercise?

a. Volume
b. Rate

8. Which value best represents the amount of air available for gas exchange (i.e. a good estimate of usable oxygen for the body)?

a. Alveolar ventilation rate
b. Tidal volume
c. Dead space volume

9. The breathing pattern will remain steady during the recovery period after exercise.

a. True
b. False

10. The name for the excess respiratory activity during the recovery stage is called repaying the oxygen debt.

a. True
b. False

Explanation / Answer

1. With respect to the air taken into the lungs - b. Some of the inhaled air remains in the airwarys and is not available for gas exchange with the blood.

All the air which is inhaled that does not take part in the gas exchange, because it either remains in the conducting airways, or reaches alveoli that are not perfused or poorly perfused. So in a nutshell, not all the air in each breath is available for the exchange of oxygen and carbon dioxide.

2. The amount of fresh air entering the alveoli when the tidal volume declines – a. The volume of air entering the alveoli decreased

3. Tidal Volume is – b. The amount of air that flows in and out of the lungs in one complete breath.

4. If a body needs more oxygen, the breathing pattern can change to increase – c. Both tidal volume and breathing rate

5. Alveolar ventilation rate is – b. The amount of air that flows in and out of the lungs in one complete breath.

6. Alveolar ventilation is a function of – All the above.

Because alveolar ventilation = ([tidal volume ? dead space] × respiratory rate)

7. On a proportional basis, parameter changes the most during exercise - b. Rate

Because, exercise increased the breathing rate.

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