An increase in the partial pressure of oxygen causes pulmonary arterioles to , thereby altering to make gas exchange more efficient. constrict; ventilation dilate; ventilation constrict; perfusion dilate; perfusion

1- dilate

2- perfusion

Explanation

when blood pressure increase the arterioles dilate (become smaller) so that cells can absorb the oxygen from the blood easily. perfusion will be altered or slowed down. (The perfusion is the passage of fluid through the circulatory system. )

a.) a destruction fo cells by viral reproduction

the generally accepted parts of modern cell theory include: all known living things are made up of one or more cells. all living cells arise from pre-existing cells by division. the cell is the fundamental unit of structure and function in all living organisms.