The epithelial extensions that interdigitate into the underlying connective tissue of the oral mucosa, helping to anchor the epithelium and resist mechanical stress, are known as:

True or False – Negative selection in the thymus requires a moderate degree of binding between TCR and MHC-antigen peptide complex.  

True or False – Positive selection of T cells in the thymus can induce self-tolerance to protect normal organs from T cell attacks.

True or False – CAR-T cells do not require major histocompatibility complexes (MHC) matching to activate.

Which of the following defines the role of opsonization?

Match the cytokine with its function.  (Choose only one answer for each cytokine; not all functions will be used)

True or False – CD4+ T cell recognizes the MHC II-antigen peptide complex.

Nutrients that encourage the growth of beneficial microbes in the intestines are known as_________.

The use of a drug to prevent a person at risk of an imminent infection is called_________.

Vials of microorganisms that undergo the freeze-drying process called_________ will remain preserved and viable for years.