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. )

label a cell membrane

label b cytoplasm

label c ribosomes

label d dna

the membrane forms the outside of the cell

cytoplasm is the liquid within

ribosomes are the components within that distribute rna

the dna is the genetic make-up

not too sure but maybe in the hot springs.