The oral mucosa covering the base of the alveolar bone

• is normally non-keratinized but can become keratinized in response to physiological stimulation.

• is closely bound to underlying muscle and bone.

• does not contain elastic fibres.

• Correct answer

  merges with the keratinized gingiva at the mucogingival junction

• has a tightly woven dense collagenous corium.