NDA TBL 1 Chunk 3 The Composition_ Production and Functions of Saliva

Which of the following best describes saliva?

A dilute, clear secretion composed of more than 99% water

The normal pH range of saliva is approximately

6.0 to 7.0, making it slightly acidic

Which combination correctly lists major salivary glands?

Parotid, submandibular and sublingual

The parotid glands primarily produce which type of secretion?

Pure serous secretions that are clear to pale yellow

Which gland contributes the highest proportion of overall salivary volume?

Submandibular gland producing around 65%

Minor salivary glands are located in which of the following regions?

In the buccal mucosa, pharynx, tongue and lower lip

Which cells in the salivary gland are responsible for producing the primary secretion?

Acinar cells

Striated duct cells are primarily involved in which process?

Reabsorption of sodium for electrolyte regulation

Myoepithelial cells function mainly to:

Contract to squeeze saliva from acinar units

Which major component of saliva plays the greatest role in buffering acids?

Bicarbonate diffusing into plaque during meals

Which of the following best describes demineralisation?

The removal of calcium and phosphate from the enamel matrix

Remineralisation of enamel is facilitated by:

Salivary delivery of calcium and phosphate ions

Mucins primarily assist with which of these actions?

Lubrication, tissue protection and microorganism adherence

Which category of salivary function includes the role of mucins?

Lubrication and protection of oral surfaces

Which of the following salivary functions is MOST influenced by secretory immunoglobulins?

Antibacterial activity and infection defence

Salivary amylase is primarily responsible for:

Early partial breakdown of starch during mastication

Which gland contains the highest proportion of mucous acinar cells?

Sublingual gland along the floor of the mouth

Which type of duct is the final segment before saliva enters the oral cavity?

Excretory duct

Which component is MOST responsible for neutralising acid within dental plaque?

Bicarbonate entering plaque during eating