Function of epiglottis

prevents secretion of upper air passage

Explanation:

to prevent foods and drinks from falling down the airway which is called aspiration and may lead to pneumonia

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.