Prokaryotes are cells without a distinct nucleus.They have genetic material but that material is not enclosed within a membrane. Prokaryotes include bacteria and cyanophytes. The genetic material is a single circular DNA strand and is located within the cytoplasm.
Healthcare providers consider a normal blood pressure reading to be 120/80 or below. However, normal blood pressure can actually fall anywhere in a range from 90/60 to 120/80 -- it's not just one set number. The top number of the blood pressure reading is called the systolic pressure.
Normal blood pressure is a measurement of less than 120/80. Hypertension is defined as a reading of 140 over 90 or greater. Those with blood pressure readings between normal blood pressure and high blood pressure are considered to have prehypertension. The researchers measured the men's blood pressure following a 40-minute brisk walking session and four, 10-minute brisk walking bouts.