Final answer:
The effector T lymphocyte population produced via the activation of a naive T cell through antigen presented in MHC Class I is CTL (cytotoxic T lymphocytes).
Step-by-step explanation:
The effector T lymphocyte population that is produced via the activation of a naive T cell through antigen presented in MHC Class I is the CTL (cytotoxic T lymphocyte).
When a naive CD8+ T cell interacts with an antigen presented in MHC Class I on an antigen-presenting cell (APC), it becomes activated and differentiates into cytotoxic T lymphocytes (CTLs).
CTLs have the ability to directly kill infected cells by inducing apoptosis and also emit cytokines to amplify the immune response.