Digestion And Absorption VSAQs. Flashcards
Give the dental formula of adult human being?
i= 2/2, c= 1/1, pm= 2/2, m= 3/3= 16 x 2 = 32.
Bile juice contains no digestive enzymes. Yet it is important for digestion. How?
a) Bile salts in bile juice emulsify fats.
b) Bile activates the lipases of pancreatic and intestinal juices.
What would happen if, HCL was not secreted in the stomach?
a) Microorganisms that enter the stomach along with food can cause health problems.
b) Pepsinogen and prorenin cannot be activated. Hence protein digestion does not occur in stomach.
Explain the terms thecodont and diphyodont dentitions.
1) If teeth are embedded in sockets of the jawbone, the dentition is described as thecodont dentition.
2) If two sets of teeth are formed in lifetime (milk teeth, which are replaced by permanent teeth), the dentition is described as disphyodont dentition.
What is autocatalysis? give two examples.
a) if one of the products obtained in the reaction functions as a catalyst in the same reaction, the product is an auto catalyst, and the process is called autocatalysis.
b) Trypsinogen gets converted to Trypsin under enterokinase.
Trypsinogen converts into Trypsin under Trypsin
Chym trypsinogen converted into Chymotrypsin under Trypsin.
What is chyme?
Food that enters the stomach is thoroughly mixed with the gastric juice by churning movements and thus it becomes a dense acidic fluid called chyme.
Name the different types of salivary glands of man and their locations in the human body.
a) Parotid glands - Located below the bases of the pinnae.
b) Sub maxillary glands - Angles of the lower jaw.
c) Sub lingual glands - Below the tongue.
Name different types of papillae present on the tongue of man ?
a) Fungiform papillae
b) Filiform papillae
c) Circumvallate papillae
What is the hardest substance in the human body? what is its origin?
Enamel is the hardest substance of the human body which is secreted by ameloblasts of ectodermal origin.
Distinguish between deglutition and mastication.
a) Mastication is the chewing of food among teeth. The tongue mixes saliva with the food during mastication.
b) The process of swallowing food through the oesophagus is known as deglutition.
