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Bio 209 Digestive system lab quiz review
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This is a comprehensive and detailed Digestive system lab quiz review for Bio 209.
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Lab Quiz 1 ReviewDigestive system:
Structures of the gastrointestinal tract:
● Mouth
● Pharynx
● Esophagus
● Stomach
● Small intestine
● Large intestine
● Rectum
● Anus
What are the structures that make up the mouth?
● Incisors- chisel-shaped and adapted for cutting into food
● Cuspids (canine)- tear food
● Bicuspids (premolars)- crush and grind food
● Molars- grind food
Papillae are projections of the lamina propria there are 3 types:
o Filiform papillae- have no taste buds but create friction to move the food around your
mouth
o Fungiform papillae- these taste buds resemble mushrooms and are scattered all over the
o Circumvallate papillae- these taste buds form an inverted “V” on the posterior portion of
the tongue.
What part of the tongue senses taste? The anterior 2/3 of the tongue senses sweet, sour, and salty
tastes. The posterior 1/3 of the tongue senses bitter tastes.
What is Saliva? Saliva contains water, mucin, and salivary amylase. The pH of saliva is 6.35 to
6.85. There are 3 glands that secrete saliva into the mouth:
o Parotid gland
o Submandible gland
o Sublingual gland
What is the Pharynx and Where is it located? The Pharynx is the throat and has 3 regions:
● Nasopharynx- is located posterior to the nasal cavity
● Oropharynx- is located posterior to the oral cavity
● Laryngopharynx- is located posterior to the larynx and connects the mouth to the
esaphogas.
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