Part 4 of Chapter 6: Blood pressure🫀

Question 1

What is blood presusre?

Answer 1

• Blood pressure refers to the pressure that blood exerts on the walls of the blood vessels.
• E.g. Veins, arteries and capillaries.

Question 2

Where is blood taken from a person to measure their blood pressure?

Answer 2

• The blood pressure of a person is usually measured from the arteries of the upper arm and using the unit, millimetres of mercury (mmHg).

Question 3

What is the difference between the blood pressures in ventricular systole and ventricular diastole?

Answer 3

The graph is in the revision guide and notebook.

Question 4

What is a graph that shows the pressure changes that take place in the left side of the heart during the cardiac cycle?

Answer 4

The graph is in the revision guide and notebook.

Question 5

How is a blood pressure reading expressed in a ratio?

Answer 5

• Blood pressure readings are expressed as a ratio of the systolic pressure over the diastolic pressure.
• Blood pressure readings vary from person to person. (Some of the factors: Emotions, age, stress, illness, and incidents (trauma).)
• The systolic pressure of an adult ranges from 120-140 mmHg and the diastolic pressure ranges from 75-90 mmHg.
• A healthy blood pressure reading should he lower than 120/80 mmHg, while a blood pressure reading of 140/980 mmHg or higher indicates high blood pressure or hypertension.

Question 6

What are the causes of high blood pressure?

Answer 6

• High blood pressure may occur temporarily after a vigorous exercise or when a person is angry, but persistent high blood pressure is a dangerous medical condition that requires medical attention.