How do Americans show respect to others, if they choose to show respect?

In Asia, we bow to our elders and superiors, in religious occasions, we kowtow. Some Europeans, like French use “vous” to address superiors respectfully. How would Americans show respect to their superiors, elders, teachers? Is there a cultural expectation for Americans to show respect in their actions and in their language? The closest I’ve seen for Americans showing respect is in old movies, where people take off their hats and hold them in their hands when speaking with important people.