Marine Corps Physical Fitness Test. Fitness is essential to the day-to-day effectiveness and combat readiness of the Marine Corps. The Marine Corps considers physical fitness an indispensable aspect of leadership.
A: Chemical energy is for producing heat in the human body to sustain vital functions, converting solar energy in plants through photosynthesis, producing electrical energy in batteries to power devices and burning fossil fuels in combustion engines to produce heat or motion.
All chemical reactions in your body are started by chemicals called enzymes. For example, if you convert chemical A to chemical B and release energy, enzymes must start these reactions. All enzymes function in a very narrow range of acidity. (The degree of acidity or alkalinity is expressed as pH.).