If a person has a blood pressure of 120/90, his mean arterial pressure would be ________ mm Hg.Question 7Select one:a.210b.100c.93d.105e.90Clear my choice

1. Break Down the Problem

To find the Mean Arterial Pressure (MAP), we use the formula:

$MAP = DBP + \frac{1}{3}(SBP - DBP)$

Where:

• $DBP$ = Diastolic Blood Pressure
• $SBP$ = Systolic Blood Pressure

Given:

• $SBP = 120 \, mm \, Hg$
• $DBP = 90 \, mm \, Hg$

2. Relevant Concepts

We are applying the MAP formula to calculate the mean arterial pressure based on the given systolic and diastolic values.

3. Analysis and Detail

Substituting the known values into the MAP formula:

$MAP = 90 + \frac{1}{3}(120 - 90)$

Calculating the difference:

$120 - 90 = 30$

Now substituting back into the formula:

$MAP = 90 + \frac{1}{3}(30)$

Calculating $\frac{1}{3}(30)$:

$\frac{30}{3} = 10$

Now add this value to the diastolic pressure:

$MAP = 90 + 10 = 100 \, mm \, Hg$

4. Verify and Summarize

We have calculated the Mean Arterial Pressure as $100 \, mm \, Hg$. The calculations were straightforward and verified.

Final Answer

The mean arterial pressure is 100 mm Hg. Therefore, the correct option is b. 100.