Which statement concerning physiological factors of infancy is true?
a. The infant has a slower metabolic rate than an adult.
b. An infant is not able to digest protein and lactase.
c. Infants have a slower circulatory response than adults.
d. The kidneys of an infant are less efficient in concentrating urine than an adult's kidneys.
D
The infant's kidneys are not as effective at concentrating urine compared with an adult's kidneys because of immaturity of the renal system and a slower glomerular filtration rates. The infant's metabolic rate is faster, not slower, than an adult's. Although the newborn infant's gastrointestinal system is immature, it is capable of digesting protein and lactase, but the ability to digest and absorb fat does not reach adult levels until approximately 6 to 9 months of age.
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