The resting cardiac rate or pulse rate, measured in beats per minute, is maintained in a state of dynamic constancy by negative feedback loops initiated by sensors in response to changes in blood pressure and other factors.herefore, the resting pulse rate is not absolutely constant but instead varies about a set-point value. This exercise will demonstrate that your pulse rate is in a state of dynamic constancy (implying negative feedback controls).
A fleet is defined as a group of ships, vessels or vehicles that operate together or that are under the control of one person. 1  An example of fleet is a group of ships. 2  An example of fleet is all of the cars owned by a rental car agency.  a number of warships under one command, usually in a definite area of operation.
In the time of Mesopotamia, Ancient Persia, Ancient Greece and the Roman Empire, warships were always galleys (such as biremes, triremes and quinqueremes): long, narrow vessels powered by banks of oarsmen and designed to ram and sink enemy vessels, or to engage them bow-first and follow up with boarding parties.