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.
2. Blood pressure and heart rate have ânormalâ target numbers. False: There are guidelines, but whatâs normal varies from person to person. Optimal blood pressure typically is defined as 120 mm Hg systolic â which is the pressure as your heart beats â over 80 mm Hg diastolic â which is the pressure as your heart relaxes. For your resting heart rate, the target is between 60 and 100 beats per minute (bpm).