What physiological response would likely occur in a newborn crying when its feet are flicked?

When a newborn cries in response to a stimulus such as having its feet flicked, it demonstrates a physiological reaction characterized by increased muscle tone and resistance to movement. This is a reflexive response often associated with the infant's instinctual reactions to potential discomfort or perceived threats. As the newborn cries, their body prepares to react to the situation, which involves muscle engagement and an effort to resist movements that may be perceived as harmful or uncomfortable.

The crying itself is a complex response that activates various systems in the body, including the nervous and muscular systems, increasing alertness and readiness to engage or withdraw from the stimulus. This resistance to movement signifies a natural protective mechanism, indicative of the newborn's developing physiological responses to environmental stimuli.

In contrast, a strong pulse, weak muscle tone, or high blood pressure do not align with the expected response of a crying newborn reacting to mild stimulation, as the resistance to movement showcases the engagement and readiness of the infant’s muscular and neural systems.