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18 Questions

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Oral Health and Composition of Saliva

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Questions and Answers

What is a common consequence of the absence of salivation?

Ulcerated and infected oral tissues (correct)

Improved oral health

Increased saliva production

Enhanced esophageal peristalsis

What is a characteristic of saliva composition at the lowest flow rate?

Highest K+ concentration

Composition closest to that of plasma

Lowest osmolality, lowest Na+, Cl-, and HC03- concentrations (correct)

Highest osmolality and highest Na+, Cl-, and HC03- concentrations

What is the primary function of the enzyme ptyalin in saliva?

Digesting starches (correct)

Digesting proteins

Regulating salivary gland function

Lubricating and surface protection

What is the effect of aldosterone on ductal cells in salivary glands?

Increase Na+ and Cl- reabsorption Signup and view all the answers

What is the primary function of the mucus secretion in saliva?

Lubricating and surface protection Signup and view all the answers

What is the characteristic of saliva after it passes through the ducts?

Hypotonic and has a lower osmolality than plasma Signup and view all the answers

What is the primary function of salivary amylase in the digestive process?

Initial digestion of starch Signup and view all the answers

Which of the following is NOT a function of saliva in oral hygiene?

Providing metabolic support for bacteria Signup and view all the answers

What is the primary site of action of lingual lipase in the digestive process?

Mouth Signup and view all the answers

What is the role of mucus in saliva during the digestive process?

Lubrication of ingested food Signup and view all the answers

Which of the following does NOT stimulate pancreatic secretions?

Atropine Signup and view all the answers

What is the function of lysozyme in saliva?

Destroying bacteria Signup and view all the answers

What is the primary nervous system responsible for controlling salivary secretion?

Parasympathetic nervous system Signup and view all the answers

Which of the following factors decreases saliva production?

Sleep Signup and view all the answers

What is the effect of sympathetic stimulation on salivary secretion?

Increases production of thick, mucous saliva Signup and view all the answers

What is the primary function of the parasympathetic nervous system in salivary secretion?

Promoting glandular growth and metabolism Signup and view all the answers

What is the effect of anticholinergic drugs on salivary secretion?

Decreases production of saliva Signup and view all the answers

What is the second messenger involved in the parasympathetic stimulation of salivary secretion?

Inositol triphosphate (IP3) Signup and view all the answers