Use the pace

Where is the pace maker situated :-

Assertion: SAN is also called pacemaker. Reason: SAN sets the pace of the activities of the heart.

(a) What is the duration of one complete heart beat (cardiac cycle) ? (b) When do the sounds 'lub' and 'dup' occur ? (c ) Name the pace maker of the heart.

He was asked to ACCELERATE the pace of work .

AT international level, various organisation exist for accelerating the pace of development and trade among the nations. Name one such organisation.