Question

If a person has:

VT = 500 mL

VD = 100 mL

breath rate = 10 breaths per minute

then VE (respiratory minute volume) is ________

and VA (alveolar ventilation) is ________.

2)When a sedentary healthy person begins athletic training, which of these changes will occur over time?

a)resting cardiac stroke volume will increase

b) we increase the number of lymphocytes that recognize that specific pathogen

c)we recognize the feeling of the disease if we catch it a second time

d)all of our body's cells become stronger at resisting that pathogen

3)Emphysema os

a) arrises from weakening of the muscles of ventilation

b)  reduces lung compliance (making it harder to inhale)

c) reduces the respiratory surface area of the lungs

d) increases airway resistance

4) The diaphragm contracts (shortens) during:\

a. quiet exhalation

b. forced exhalation

c.all answers are true

d.inhalation

Answer 1

VE = VT ( tidal volume) x respiratory rate TV = 500mL

= 500mL x   10/min   

= 5000mL/min.

VA = (VD x VT )respiratory rate VD = 100mL

(500-mL —100mL) x 10 breath /min.

= 400mL x 10/ min = 4000mL/min.

2) Resting cardiac stroke volume will increase.
     
   The resting cardiac stroke volume is increased when a healthy person begins athletic training.

3) increases airway resistance ( d)

     The emphysema causes shortness of breath, which is due to the increased airway resistance.

4) inhalation (d)

   During inspiration, the diaphram contracts and the muscle pulls upward and muscles between the rib contracts.