The nurse is teaching a new mother about the drastic growth and developmental changes her infant will experience in the first year of life. Which statement describes a developmentalmilestone occurring in infancy?
The heart triples in size over the first year of lifE. the average pulse rate decreases from 120 to 140 in the newborn to about 100 in the 1-year-old.
Most infants triple their birth weight by 4 to 6 months of age and quadruple their birth weight by the time they are 1 year old.
By 6 months of age, the infant's brain weighs half that of the adult brain; at age 12 months, the brain weighs 2.5 times what it did at birth.
The head circumference increases rapidly during the first 6 months: the average increase is about 1 in per month.
The Correct Answer is B
A. The heart triples in size over the first year of lifE. While cardiac growth occurs during infancy, the described change is not specific to a developmental milestone.
B. Most infants triple their birth weight by 4 to 6 months of age and quadruple their birth weight by the time they are 1 year olD. This statement accurately describes a significant developmental milestone related to physical growth during infancy.
C. By 6 months of age, the infant's brain weighs half that of the adult brain; at age 12 months, the brain weighs 2.5 times what it did at birth: This statement describes brain growth rather than a
milestone related to physical growth or development.
D. The head circumference increases rapidly during the first 6 months: the average increase is about 1 in per month: While head circumference growth is important, it does not specifically relate to the described developmental milestone of weight gain during infancy.
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Related Questions
Correct Answer is C
Explanation
A. Carotid artery: The carotid artery is not typically used to assess heart rate in infants due to its location and difficulty in palpation.
B. Radial artery: The radial artery is not typically used to assess heart rate in infants, especially in non-cooperative or newborn infants.
C. Apex of the heart: Assessing the heart rate by auscultating the apex of the heart with a stethoscope is the most accurate method for infants.
D. Brachial artery: The brachial artery is not typically used to assess heart rate in infants. It is commonly used to measure blood pressure.
Correct Answer is B
Explanation
A. At 3 months, infants are not expected to have the fine motor skills necessary to pick up objects with their fingers.
B. By 3 months, infants should be able to lift their head and chest during tummy time, and the inability to do so could indicate developmental delays or other health issues.
C. Infants typically cannot sit without support until they are around 6 months old.
D. The ability to bring objects to the mouth develops around 4 months of age, so it is not expected for a 3-month-old infant to do this consistently.
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