To solve this problem, let's analyze each statement about blood pressure and determine which one is correct based on medical standards.
Blood pressure is measured in millimeters of mercury (mm Hg) and recorded as two numbers: - Systolic pressure (top number): Pressure when the heart beats - Diastolic pressure (bottom number): Pressure when the heart rests between beats
According to the American Heart Association: - Normal: Below 120/80 mm Hg - Elevated: 120-129/<80 mm Hg - Hypertension Stage 1: 130-139/80-89 mm Hg - Hypertension Stage 2: 140+/90+ mm Hg - Hypertensive Crisis: 180+/120+ mm Hg (requires immediate medical attention)
Partially correct but not entirely accurate. While 130/90 is considered Stage 1 Hypertension, treatment decisions depend on overall cardiovascular risk. Lifestyle changes are typically recommended first.
Incorrect. While this is within normal range, ideal blood pressure is typically considered around 120/80 mm Hg. 100/55 might be too low for some individuals.
Incorrect. This is hypotensive (low blood pressure) and might actually cause dizziness or fatigue rather than increased activity.
Correct. This is a hypertensive crisis that can damage organs (brain, heart, kidneys) and requires immediate medical attention.
Extremely high blood pressure (190/110 mm Hg): - Can cause stroke or heart attack - May lead to kidney damage - Can result in vision problems - Puts excessive strain on arterial walls
The correct statement is: "190/110 mm Hg harm vital organs", as this represents a dangerous hypertensive crisis that can cause immediate damage to organs.
What is the voltage across the inductor at $t=0$? (Circuit diagram provided: A 60V voltage source in series with a switch that closes at $t=0$, a 30 ohm resistor, and a 15H inductor.) 