The pH is mentioned to be around 2.8 after 3 minutes, which indicates an acidic nature initially.

Prions are infectious agents composed solely of protein. They do not have nucleic acids like DNA or RNA and are responsible for several neurodegenerative diseases. The primary reservoir for prions is thus the proteinaceous particles themselves.

Tetany is a common symptom of low serum calcium levels, characterized by muscle cramps and spasms due to increased neuromuscular excitability.

The primary site of vitamin B12 absorption in the intestine is the ileum, where it binds to intrinsic factor for absorption.

Metastatic disease in the oral cavity typically occurs in the posterior mandible. This is because the bone in this area is relatively porous and has a rich blood supply, making it more susceptible to the spread of cancer cells from distant sites in the body.