Fulguration of a rectal polyp is an example of which Root Operation?

Which of the following enzymes breaks down arachidonic acid into prostaglandins?

a. phospholipase b. hyaluronic acid c. collagenase d. cyclo-oxygenase

Where are the receptors associated with the Hering-Breuer reflex located?

a. visceral pleura and walls of bronchi and bronchiole b. intercostal spaces and walls of the bronchi and bronchioles c. parietal pleura and walls of the bronchi and bronchioles d. visceral pleura and walls of the trachea, bronchi, and bronchioles