18 Questions
What is a common consequence of the absence of salivation?
Ulcerated and infected oral tissues
What is a characteristic of saliva composition at the lowest flow rate?
Lowest osmolality, lowest Na+, Cl-, and HC03- concentrations
What is the primary function of the enzyme ptyalin in saliva?
Digesting starches
What is the effect of aldosterone on ductal cells in salivary glands?
Increase Na+ and Cl- reabsorption
What is the primary function of the mucus secretion in saliva?
Lubricating and surface protection
What is the characteristic of saliva after it passes through the ducts?
Hypotonic and has a lower osmolality than plasma
What is the primary function of salivary amylase in the digestive process?
Initial digestion of starch
Which of the following is NOT a function of saliva in oral hygiene?
Providing metabolic support for bacteria
What is the primary site of action of lingual lipase in the digestive process?
Mouth
What is the role of mucus in saliva during the digestive process?
Lubrication of ingested food
Which of the following does NOT stimulate pancreatic secretions?
Atropine
What is the function of lysozyme in saliva?
Destroying bacteria
What is the primary nervous system responsible for controlling salivary secretion?
Parasympathetic nervous system
Which of the following factors decreases saliva production?
Sleep
What is the effect of sympathetic stimulation on salivary secretion?
Increases production of thick, mucous saliva
What is the primary function of the parasympathetic nervous system in salivary secretion?
Promoting glandular growth and metabolism
What is the effect of anticholinergic drugs on salivary secretion?
Decreases production of saliva
What is the second messenger involved in the parasympathetic stimulation of salivary secretion?
Inositol triphosphate (IP3)
Test your knowledge of the importance of saliva in oral health, including the effects of its absence and the composition of saliva in relation to flow rate. Learn about the characteristics of saliva, its components, and how it compares to plasma.
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