How does Shakespeare use short dialogue to create tension in Romeo and Juliet?

In the opening scene of the first act of Romeo
and Juliet, the staccato exchange of hostilities between Sampson and Gregory,
of the House of Capulet, with Abraham, a servant of the Montagues, serves well to create
tension and effectively set the tone of animosity between the two
families.

Again, the brief, but acrid verbal exchange
between Mercutio and Tybalt in Act III suggests that action will soon follow as,
obviously, the usually loquacious Mercutio is not interested in talking in this
scene:

readability="25">

Benvolio:  By my
head, here come the
Capulets.

Mercutio:  By my
heel, I care not.

Tybalt: 
Follow me close, for I will speak to them.

Gentlemen,
good-den--a word with one of
you.

Mercutio:  And but one
word with one of us?  Couple it with something--make it a word and a
blow

Tybalt:  you shall find
me apt enough to that, sir, an you will give me
occasion.

Mercutio:  Could ou
not take some occasion without giving?
(III,i,26-32)

Not only are
the exchanges brief, but the tone and implication of meaning are extremely hostile. 
With words, Mercutio and Tybalt warm up for the sword fight.