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GI System > Lctcure 1 > Flashcards

Lctcure 1 Flashcards

1
Q

what is the two parts of the Digestive system

A

alimentary Tracts and GI tract

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2
Q

what are the accessory organs

A

liver, pancreas, salivary glands and gallbladder

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3
Q

what are the 4 functions of the GI tract

A

absorption, digestion, secretion and motility

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4
Q

what are the two ways food is digested

A

mechanically and chemically

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5
Q

why is food converted into macromolecules

A

due to the osmolarity of the cell

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6
Q

what is osmolarity dependant on

A

the amount of molecules

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7
Q

what are the two types of digestive absorption

A

diffusion (passive) and active transport

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8
Q

what are lymphatic vessels

A

tube like structures that carry blood away from the tissues and back into the bloods’ circulation

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9
Q

what is motility

A

the ability of an organism to move independently, using metabolic energy

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10
Q

what type of gland is the liver

A

exocrine gland

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11
Q

what is the main function of the liver

A

to store and concentrate bile

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12
Q

what are the 4 main layers of the GI tract

A

mucosa, submucosa, muscularis externa and serosa/adventitia

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13
Q

what are the 3 sub-layers of the mucosa

A

epithelium, lamina propria and muscularis mucosae

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14
Q

what is the purpose of the submucosa

A

to act as a thick, connective tissue that supports the mucosa

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15
Q

what does the submucosa contain

A

large blood vessels, that supply the muscularis externa and serosa, lymphatic vessels and nerves

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16
Q

what is the purpose of the muscularis externa

A

controls the contractility of the GI tract

17
Q

what are the two types of muscle in the muscularis externa

A

circular and longitudinal

18
Q

what a are the two types of GI tract motility

A

peristalsis and segmentation

19
Q

what is the purpose of the adventitia/serosa

A

connective tissue that links the GI tract to the peritoneal cavity

20
Q

what is the function of the mucosa epithelium

A

to absorb nutrients and water from the lumen, and secretion happens

21
Q

what is the lamina propria

A

thin, loose connective tissue and also supplys blood to the epithelium

22
Q

what is the purpose of the muscularis mucosae

A

thin, smooth muscle that controls contractility of the GI tract

23
Q

what does stratified mean

A

more than one layer

24
Q

why does the stomach, small and large intestine have simple cells and not stratified

A

to allow maximum and faster absorption of nutrients

25
Q

what is the submucosal plexus

A

a network of neurons between the submucosa and muscularis externa

26
Q

what is the network of neurons called that is between the muscularis externa and serosa/adventitia

A

myenteric plexus

27
Q

what is the enteric NS (ENS)

A

the two network of neurons within the GI tract

28
Q
A

GI System (5 decks)

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