What would cause a pneumothorax?

Vascular resistance is affected by:

___________________ __________________ are effective against viruses, cancer cells, and transplanted tissue.  They contain granzymes, perforin, granulysin and lymphotoxin. They are involved in cell-mediated immunity. (Choose all that apply; no partial credit)

Determine if the underlined portion of the statement are true or false. The right lung is smaller than the left lung because of the position of the heart.

Materials digested by phagocytes and the phagocytes themselves that remain will often accumulate and are commonly referred to as:

Determine if the underlined portions of the statement are true or false. Expiration during normal quiet breathing is a passive process requiring no muscular contractions.

Determine if the underlined portions of the statement are true or false. If PCO2 is lower in the alveoli than in the blood, CO2 will diffuse from the blood in the pulmonary capillaries into the air in the alveoli.

Vascular resistance is affected by:

All of the following decrease the rate of gas exchange during external respiration EXCEPT:

Which statement(s) about venules is true?