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Questions and Answers
Which salivary gland is responsible for secreting a serous secretion containing ptyalin?
What is the pH range of saliva, which is favorable for the digestive action of ptyalin?
Which type of protein secretion in saliva contains mucin for lubricating and surface protective purposes?
Which organic constituent of saliva serves to initiate digestion, particularly of starch, mediated by amylase?
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What is the daily secretion range of saliva under normal conditions?
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Which salivary gland is responsible for secreting a serous secretion containing ptyalin?
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What is the function of mucins in saliva?
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What is the pH range of saliva, which is favorable for the digestive action of ptyalin?
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Which organic constituent of saliva serves to initiate digestion, particularly of starch, mediated by amylase?
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What is the daily secretion range of saliva under normal conditions?
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Which type of compound contains the carboxyl group –COOH?
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What is the common name for 4-methyl pentanoic acid?
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Which compound is a long chain carboxylic acid also called fatty acids such as palmitic, stearic, and oleic acids?
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What do carboxylic acids form with bases?
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What type of bonds do carboxylic acids form, making them soluble in water?
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Study Notes
- Salivary Glands: There are three major paired salivary glands - Parotid, Submandibular (Submaxillary), and Sublingual. In addition, there are smaller salivary glands named based on their position in the oral cavity, such as labial, buccal, palatal, and lingual.
- Characteristics of Saliva: Daily secretion of saliva ranges from 1000 to 1500 milliliters. Saliva contains two types of protein secretions: serous, which contains ptyalin (an a-amylase) for starch digestion; and mucus, which contains mucin for lubrication and surface protection. Saliva has a pH between 6.0 and 7.0 (alkaline) and is hypotonic compared to plasma.
- Function of Saliva for Oral Hygiene: Initiates digestion, particularly of starch, through organic constituents like amylase. Protects the oral cavity from bacteria by maintaining cleanliness and reducing the risk of dental caries in patients with deficient salivation (xerostomia). Lubricates food bolus for easier swallowing with the aid of mucins.
- Carboxylic Acids and Derivatives: Compounds that contain a carboxyl group (–COOH). Boiling points are greater than alkenes with similar molecular weight and are soluble in water due to strong hydrogen bonds. Weaker than mineral acids and stronger than alcohols. They react with bases to form salts (carboxylates).
- Properties of Carboxylic Acids: Strong hydrogen bonds, soluble in water, and are weaker than mineral acids and stronger than alcohols with Ka values. They can be categorized as aliphatic, aromatic, or long-chain fatty acids. React with bases to form salts. Examples include formic acid, acetic acid, and propionic acid.
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Description
Test your knowledge of the salivary glands anatomy with this quiz. Identify the chief paired salivary glands and their locations within the oral cavity.
