Final answer:
The preferred site for injection by the nurse during a pre-kindergarten physical is the vastus lateralis quadricep muscle on the lateral aspect of the thigh.
Step-by-step explanation:
The preferred site for injection by the nurse when administering the last series of vaccines to a 5-year-old during a pre-kindergarten physical is the vastus lateralis.
The vastus lateralis is a quadricep muscle located on the lateral aspect of the thigh. It is a common site for administering injections to young children because it has a large muscle mass and is easily accessible.
By injecting the vaccine into the vastus lateralis, the nurse ensures proper delivery and absorption of the vaccine.