Aging Affects

Question 1

At birth about what percent of body weight is water

Answer 1

75

Question 2

Between ages 40 and 60, average total body water content declines to

Answer 2

55% males

47% females

Question 3

After age 60 the average total body water content is

Answer 3

50% males 45% females

Question 4

A decrease in the glomerular filtration rate and in the number of functional nephrons reduces the body’s ability to

Answer 4

Regulate pH through renal compensation

Question 5

Maintaining fluid balance requires a higher daily intake because

Answer 5

1. The bodies ability to concentrate urine declines, so more water is lost in urine.
2. Rate of insensible perspiration increases as skin becomes thinner and more delicate.
3. A reduction in ADH and Aldosterone sensitivity makes older people less able then younger people to conserve body water when losses exceed gains

Question 6

Many people over age 60 experience a net loss in

Answer 6

Body mineral content as muscle mass and skeletal mass decrease

Question 7

The reduction in vital capacity reduces the bodies ability to perform respiratory compensation, increasing the risk of

Answer 7

Respiratory acidosis