Upon hearing a loud noise,3-week-old Mia's arms and legs sprang out and her fist clenched.Her reaction best illustrated

Question

Quizplus · Accepted Answer

Mia's reaction of her arms and legs sprang out and her fist clenched in response to a loud noise is a typical example of a startle reflex, which is an automatic and involuntary response to a sudden, unexpected stimulus. This reflex is present in infants from birth and gradually disappears around 4-6 months of age. The other options, such as critical period, epigenetic mark, and stranger anxiety, do not apply to Mia's situation.

Upon Hearing a Loud Noise,3-Week-Old Mia's Arms and Legs Sprang