Question

Which infant response to cool environmental conditions is either not effective or not available to them?

1) Constriction of peripheral blood vessels
2) Metabolism of brown fat
3) Increased respiratory rates
4) Unflexing from the normal position

Answer 1

Newborns do not have an effective response of constricting peripheral blood vessels to cool environmental conditions.

Step-by-step explanation:

Newborns have various physiological adjustments to cool environmental conditions. However, one response that is either not effective or not available to them is the constriction of peripheral blood vessels. Newborns have underdeveloped nervous systems, making it difficult for them to quickly constrict superficial blood vessels in response to cold. This is further compounded by their higher surface area to volume ratio and limited subcutaneous fat for insulation, making it harder for them to maintain their body temperature.