Question 12

Loss of arterial wall elasticity is always caused by disease.

This statement is not supported by the passage, which indicates that loss of arterial wall elasticity can also occur due to aging, not solely due to disease.

A) Ventricular contracting injects roughly 70 mL of blood into the vascular system.

This statement is supported by the passage, which explicitly states that each contraction, known as ventricular contraction, ejects approximately 70 mL of blood into the vascular system. Therefore, this option is correct.

B) Blood pressure is typically measured in the brachial artery of the arm.

This statement is also supported by the passage, which mentions that blood pressure is commonly measured at the brachial artery. Thus, this option is correct.

C) Blood pressure is usually represented as a ratio of systolic pressure to diastolic pressure.

The passage confirms this statement by explaining that blood pressure is expressed as a ratio of systolic pressure over diastolic pressure. Therefore, this option is correct.

D) Loss of arterial wall elasticity is always caused by disease.

This statement is incorrect according to the passage, which notes that loss of arterial elasticity may arise due to aging as well. It does not state that this loss is exclusively due to disease, making this option unsupported by the text.

Conclusion

The correct answer is D, as the passage clarifies that loss of arterial wall elasticity can occur due to aging in addition to disease, making the statement inaccurate. Options A, B, and C are all supported by the passage, confirming their validity.