Multiple choice

The chest wall becomes stiff in old age, because

Directions: Read the passage and answer the question.

The functional declines of advancing age are depressing. The heart’s ability to pump blood drops about one per cent: blood flow to arms and legs decreases by thirty to forty per cent in old age. The amount of air a person can exhale after a deep breath lessens and the chest wall stiffens with age. However, recent studies have shown that most of these age associated declines can be delayed by exercise. Exercise lowers the resting heart - rate and increases the amount of blood pumped with each beat in older people. When stress is placed on bones through exercise, calcium content rises, with the result that resistance to fracture is improved.

  1. The heart’s ability to pump blood to it drops about one per cent

  2. The blood flow to various organs decreases

  3. The resting heart - rate becomes high

  4. The person’s ability to exhale sufficient air lessens
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Line 3 of the passage

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