Syncope is due to a temporary reduction in blood flow and therefore a shortage of oxygen to the brain. This leads to lightheadedness or a black out episode, a loss of consciousness. Non-cardiac causes: Syncope is most commonly caused by conditions that do not directly involve the heart.
Metric system basics. The simplicity of the metric system stems from the fact that there is only one unit of measurement (or base unit) for each type of quantity measured (length, mass, etc.). The three most common base units in the metric system are the meter, gram, and liter.The meter is a unit of length equal to 3.28 feet; the gram is a unit of mass equal to approximately 0.0022 pounds (about the mass of a paper clip); and the liter is a unit of volume equal to 1.05 quarts.he three most common base units in the metric system are the meter, gram, and liter. The meter is a unit of length equal to 3.28 feet; the gram is a unit of mass equal to approximately 0.0022 pounds (about the mass of a paper clip); and the liter is a unit of volume equal to 1.05 quarts.
Learn more about measurement units and how to use them with NPL e-Learning. 1  The ampere (A) The ampere is the SI base unit of electrical current. 2  The candela (cd) The candela is the SI base unit of luminous intensity. 3  The kelvin (K) The kelvin is the SI base unit of thermodynamic temperature. The kilogram (kg) The kilogram is the SI base unit of mass. The metre (m) The metre is the SI base unit of length. The mole (mol) The mole is the SI base unit of amount of substance. The second (s) The second is the SI base unit of time.