Final answer:
The lowest blood pressure reading is called diastolic pressure. It typically has a desirable value of less than 80 mm Hg and is measured when the heart is resting between beats,the correct option is D).
Step-by-step explanation:
The lowest blood pressure reading is called diastolic pressure. It represents the arterial pressure of blood during ventricular relaxation, or diastole, when the heart is at rest between beats. Diastolic pressure is usually lower than systolic pressure, which is the arterial pressure resulting from the ejection of blood during ventricular contraction, or systole. The desirable diastolic pressure is typically less than 80 mm Hg, whereas common arterial blood pressure measurements produce values of 120 mm Hg for systolic and 80 mm Hg for diastolic pressures.
These blood pressure measurements are important indicators of cardiovascular health, providing information about fluid balance and the condition of the blood vessels. High diastolic pressure can suggest problems such as fluid overload in the circulatory system or issues with blood vessel dilation, and it can strain the heart. On the other hand, a very low diastolic pressure might indicate hemorrhaging or other health issues.