Chapter 23: Respiratory System Quiz

Exhalation during quiet breathing begins when a) Inspiratory muscles relax b) Diaphragm contracts c) Blood circulation is the lowest d) Both a and b e) All of the above

a) Inspiratory muscles relax

This is the direction of diffusion of gases at the alveoli of the lungs. a) Oxygen into blood, Carbon dioxide out of blood b) Oxygen into blood, Carbon dioxide into blood c) Oxygen out of blood, Carbon dioxide out of blood d) Oxygen out of blood, Carbon dioxide into blood

a) Oxygen into blood , Carbon dioxide out of blood

If you lacked pleural fluid which function would be most affected? a) The ability to inhale b) oxygen diffusion across the respiratory epithelium c) carbon dioxide diffusion d) The ability to exhale e) Immune function in the alveoli

a) The ability to inhale

This is the primary gas exchange structure. a) A b) B c) E d) C

c) E

This is the sum of the residual and the expiratory reserve volume. a) Minimal volume b) Vital capacity c) Functional residual capacity d) Total lung capacity e) Inspiratory capacity

c) Functional residual capacity

What percent of CO2 is transported as carbaminohemoglobin? a) 45 b) 70 c) 75 d) 23 e) 7

d) 23

The respiratory control center is located: a) In the hypothalamus b) In the thalamus c) In the spinal cord d) In the medulla and pons e) None of the above

d) In the medulla and pons

Where is the terminal bronchiole? a) D b) C c) B d) E e) A

e) A

Which of the following will decrease the affinity of hemoglobin for oxygen? a) Increased acidity b) Increased temperature c) Increased PCO2 d) None of the above e) A, B, and C

e) A, B, and C

Before your lungs can fill up with too much air this area inhibits inspiration a) Expiratory area b) Apneustic area c) Rhythmicity area d) The hypothalamus e) Pneumotaxic area

e) Pneumotaxic area