The average systolic blood pressure is mm Hg.

120

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150

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Solution

The correct option is A 120
Systolic blood pressure is the pressure of blood in the arteries when the ventricles are in systole, i.e., when they are contracting. Diastolic blood pressure is the pressure of blood in the arteries when the ventricles are in diastole, i.e., when they are relaxing. The average systolic and diastolic blood pressure of a human beings are 120 and 80 mm Hg respectively.

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Question 116 (iii)

Health Application A doctor reports blood pressure in millimetres of mercury (mm Hg) as a ratio of systolic blood pressure to diastolic blood pressure (such as 140 over 80). Systolic pressure is measured when the heart beats and diastolic pressure is measured when it rests. Refer to the table of blood pressure ranges for adults.
Manohar is a healthy 37 yr old man whose blood pressure is in the normal category.
Calculate the ratio of average systolic to average diastolic blood pressures in the prehypertension category.

Question 116 (ii)

Health Application A doctor reports blood pressure in millimetres of mercury (mm Hg) as a ratio of systolic blood pressure to diastolic blood pressure (such as 140 over 80). Systolic pressure is measured when the heart beats and diastolic pressure is measured when it rests. Refer to the table of blood pressure ranges for adults.
Manohar is a healthy 37 yr old man whose blood pressure is in the normal category.
If Manohar's systolic blood pressure is 102 mm Hg, then use the ratio from part (a) to predict his diastolic blood pressure.

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