A nuclear stress test is similar to the exercise stress test or pharmacological (chemical) stress test, but a small amount of radioactive substance is used to determine the health of the heart and blood flow to the heart.
The following are the four basic types of economics resources: Land â natural resources such as iron ore, gold, diamonds, oil, etc. Labor â human resources such as wage-earning workers. Capital â plants and equipment used in the production of final goods, such as assembly lines, trucks, heavy duty machinery, factories, etc.
What are four sectors of the economy? A: Four sectors of the economy are the primary sector, the secondary sector, the tertiary sector and the quaternary sector. The various sectors are defined by population engagement and by relationship to the Earth's raw materials. Keep Learning.