What is the normal range for mean pulmonary artery pressure in a healthy adult?

Diseases caused by a combination of genetic and environmental factors are called:

a. multisystem failure. c. multiple defect. b. multifactorial disorders. d. geno-environmental.

The lung condition cause by inhalation of various dust particles such as coal or iron dust is known as:

a. pneumonia. b. pneumoconiosis. c. pneumothorax. d. hemopneumothorax.