An AC system has many components: compressor, condenser, receiver dryer, evaporator, and hoses. The compressor, the âheartâ of the carâs air conditioning system works like a pump taking refrigerant, (R-12 in older cars, R-134a in 1995 and newer cars) and pressurizing it, passing it along to the evaporator. The AC compressor has several moving parts (including pistons and valves).
They vary throughout the day. (Click here for a blood sugar chart.) For someone without diabetes, a fasting blood sugar on awakening should be under 100 mg/dl. Before-meal normal sugars are 70â99 mg/dl. âPostprandialâ sugars taken two hours after meals should be less than 140 mg/dl. Those are the normal numbers for someone without diabetes.
During aerobic, upright exercise, such as walking, people will experience an increase in systolic blood pressure and a slight decrease in diastolic blood pressure. Systolic blood pressure increases to improve blood flow, which is necessary to provide higher levels of oxygen to working muscles.lood pressure readings consider two numbers: systolic and diastolic pressure. Systolic blood pressure is the pressure in the arteries when the heart beats, while diastolic blood pressure is the pressure in the arteries between heartbeats when the heart is resting and refilling with blood.