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Digestion > 2 Response To Gastrointestinal Tract To A Meal > Flashcards

2 Response To Gastrointestinal Tract To A Meal Flashcards

1
Q

What does reclaimed mean

A

Reabsorbed back into circulation

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2
Q

4 major functions of gut

A

Secretion
Digestion
Absorption
Motility

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3
Q

What is one of the most important sphincters

A

Lower esophageal sphincters

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4
Q

What does nerve causes receptive relaxation in the proximal stomach

A

Vagus nerve

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5
Q

What area does all the mixing and grinding in the stomach

A

Antrum and pelorus

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6
Q

What area is the reservoir of the stomach

A

Fundus and body

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7
Q

What keeps food particles from passing out of the stomach

A

Pylorus

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8
Q

What are the 3 phases of gastric acid secretion

A

Cephalic
Gastric
Intestinal

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9
Q

What is the major regulator of your response to a meal

A

Brain

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10
Q

What produces pepsinogin

A

Chief cell

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11
Q

What cell produces acid in the stomach

A

Parital

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12
Q

What are some characteristics of pepsinogin

A

Secreted by Chief cell inactive form

When enters stomach activates and becomes pepsin which breaks down food

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13
Q

What does pepsin break down

A

Proteins

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14
Q

Endocrine

A

Hormone produced, goes through circulation to target cell

Uses receptors

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15
Q

Neurocrine

A

Uses acetylcholine

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16
Q

Paracrine

A

Goes to nearby cells

17
Q

What does parietal cell produce

A

HCl

18
Q

What is important about the triggering mechanism of parietal cell

A

There are 3 ways to stimulate it as back ups

19
Q

What part of the stomach produces secretions

A

Glandular part

20
Q

What part of the stomach in the horse is more susceptible to ulcers

A

Nonglandular

21
Q

Why does the nonglandular part of the stomach get ulcers

A

Mucus layer produces bicarbonate to counter the acid. Nonglandular part of the stomach does not have bicarbonate

22
Q

What stops the production of acid

A

Negative feedback by acid to inhibit gastrin release

Acid stimulates somatostatin to block G cell

23
Q

What causes gastric emptying

A

Intragastric pressure exceeds duodenal and pyloric pressure.

Influenced by physical and chemical composition of a meal

24
Q

What is CCK released in response to

A

amino acids and fatty acids

25
Q

What does CCK do

A

Inhibit gastric emptying

26
Q

What must the tonicity of a meal be before entering small intestine

A

Isotonic

Regulated by duodenum

27
Q

What does the pancreas do

A

Produces enzymes

28
Q

What are the two parts of the pancreas

A

Exocrine: into duodenum, digestive function
Endocrine: into blood, not as important for class

29
Q

Why are enzymes secreted in an inactive form

A

Keeps organs from digesting themselves before the enzyme can reach the stomach

30
Q

Main function of the gastrointestinal tract

A

Extract water, nutrients, and electrolytes and expel undirected residue as feces

Digestion (6 decks)

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