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MEDSCI142 > Digestive System > Flashcards

Digestive System Flashcards

1
Q

Length of gut

A

5m

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2
Q

Two glands of gut

A

Pancreas and liver

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3
Q

Layers of a normal tooth

A

Enamel, dentin, pulp

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4
Q

What is inside the pulp of a normal tooth

A

Blood nerve and lymphatics

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5
Q

Two broad sections of a tooth

A

Crown and root

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6
Q

What is directly adjacent to the dentin in the root of the tooth (outward and inward)

A

Medial - pulp

Lateral - cementum

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7
Q

How are teeth anchored to gums

A

Cementum is linked to alveolar bone by the periodontal ligament

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8
Q

Characteristics of enamel

A

Hardest tissue of body, entirely extra-cellular, no sensation. Calcium phosphate and carbonate

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9
Q

Characteristics of dentin

A

Odontoblast cells

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10
Q

Characteristics of pulp

A

Softer tissue with blood nerve and lymphatics

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11
Q

Characteristics of cementum

A

Calcium protective connective tissue around root

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12
Q

Characteristics of periodontal ligament

A

Collagenous fibres link alveolar bone to cementum

Mechanoreceptors sense when to stop chewing, and how to spread force of bite across the tooth

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13
Q

Digestive significance of vitamin C deficiency

A

Ondontoblasts deficient in collagen production, scurvy

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14
Q

Muscles of the tongue

A

Longitudinal (forwards and backwards), vertical (thin and thick) and lateral (torsion)

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15
Q

Pipillae of tongue

A

Filiform - spikey, most common
Fungiform - mushroom shape, few taste buds
Vallate - Have a mote, most of taste buds

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16
Q

Major salivary glands of mouth

A

Parotid - serous gland (watery + amylase & Lysozyme) by ear
Sublingual - Muscosal, most anterior
Submandibular - inferior of parotid, anterior to sublingual, mucosal and serous

17
Q

How is surface area utilized in the gut

A

Gross convolutions
Evaginations like Villus
Invaginations like glands
Luminal folds

18
Q

4 tunics of the gut

A

Mucosa
Submucosa
Muscularis externa
Serosa

19
Q

Outline the mucosa

A

Has epithelium, protection and secretion/absorption
Lamina propria is the soft bed of nerves and capillaries beneath epithelium
Muscularis mucosae inner circular and outer longitudinal

20
Q

Outline the submucosa

A

Nerve plexus to control muscularis mucosae
Larger vessels
Connects mucosa to muscularis externa

21
Q

Outline muscularis externa

A

Myenteric nerve plexus controls muslces

Inner circular and outer longitudinal

22
Q

Outline serosa

A

Serous membrane of the gut

23
Q

What is the enteric nervous system

A

Autonomic nervous system of the gut

MEDSCI142 (9 decks)

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