The Gastrointestinal System

BIOL 2420 study group's GI system mindmap (up to March 31 session, up to G2 slide 25)

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The Gastrointestinal System by Mind Map: The Gastrointestinal System

1. Large intestine

2. Respiratory System

3. Renal System

4. Saliva

4.1. Control

4.1.1. Stimulation

4.1.1.1. Tactile

4.1.1.2. ANS

4.1.1.2.1. PNS

4.1.1.2.2. SNS

4.1.1.3. Cognitive

4.1.1.3.1. Conditioning

4.2. Functions

4.2.1. Lubrication & Moistening

4.2.2. Antibacterial

4.2.3. Digestion

4.2.3.1. Minor

4.2.3.2. Enzymes

4.2.3.2.1. Amylase

4.2.3.2.2. Lipase

5. Major Organs

5.1. Stomach

5.1.1. Gastric Rugae

5.2. Esophagus

5.3. Intestines

5.3.1. Small intestine

5.3.1.1. Duodenum

5.3.1.2. Jejunum

5.3.1.3. Ileum

5.3.2. Large intestine

5.3.2.1. Ascending Colon

5.3.2.1.1. Cecum (Caecum)

5.3.2.1.2. Appendix

5.3.2.2. Transverse Colon

5.3.2.3. Descending Colon

5.4. Rectum

5.5. Pharnyx

5.6. Anus

5.7. Mouth/Oral Cavity

6. Prevention of Acid Secretion

6.1. H2 receptor blockers

6.1.1. TZP

6.2. Proton pump inhibitors

6.2.1. PP

7. Cystic fibrosis (Mucoviscidosis)

7.1. Defective chloride channel

7.1.1. Gene mutation

7.1.2. water secretion

8. Anatomy

8.1. Accessory Organs

8.1.1. Pancreas

8.1.2. Oral Cavity

8.1.2.1. Teeth

8.1.2.2. Tongue

8.1.2.3. Salivary Glands

8.1.2.3.1. Submandibular

8.1.2.3.2. Parotid

8.1.2.3.3. Sublingual

8.2. Structure

9. Histology

9.1. Gastric Rugae

9.2. Small Intestine

9.3. Tissue Layers

9.4. Enteric Plexus

9.4.1. Myenteric plexus

9.4.2. Submucousal plexus

10. Functions

10.1. Secretion

10.1.1. Gastric

10.1.2. Lubrication

10.1.3. Liquifying

10.1.3.1. Aids absorption

10.1.3.2. Neutralization

10.1.4. Digestion

10.2. Storage and Elimination

10.3. Absorption

10.3.1. Water

10.3.1.1. Vital to survival

10.3.1.2. Major uptake in small intestine

10.3.2. Vitamin B-12

10.3.2.1. Intrinsic factor

10.3.2.1.1. Ileum

10.3.3. Transport

10.4. Digestion

10.4.1. Mechanical

10.4.2. Chemical

10.5. Propulsion/Motility

10.5.1. Reflexes

10.5.1.1. Peristalsis

10.5.1.1.1. Peristalsis reflex

10.5.1.1.2. Weak but repetitive

10.5.1.2. Enteroenteric

10.5.1.2.1. Inhibition of peristalsis

10.5.1.3. Ileogastric

10.5.1.3.1. No room

10.5.1.3.2. Gastric emptying slowed

10.5.1.3.3. similar to enteroenteric

10.5.1.4. Gastroileal

10.5.1.5. Colonileal

10.5.1.6. Gastrocolic

10.5.1.6.1. Defecation

10.5.1.6.2. IAS to relax

10.5.1.6.3. EAS -> voluntary

10.5.1.6.4. gastric/duodenal distension

10.5.2. Ingestion

10.5.2.1. Stomach

10.5.2.1.1. Wringing motion (oblique muscle)

10.5.2.1.2. Mixing and Churning

10.5.2.1.3. Gastrogastric reflex

10.5.2.1.4. Peristaltic waves

10.5.2.2. Esophagus

10.5.2.2.1. Weak peristalsis

10.5.2.2.2. UES under voluntary control (skeletal muscle)

10.5.2.3. Small intestine

10.5.2.3.1. Movements

10.6. Immune Barrier

11. Chemistry

11.1. Buffer Chemistry

12. Metabolism Contribution

13. Terms to Remember

14. Gastrointestinal Diseases/Conditions

14.1. Too much gastric secretion

14.1.1. H. pylori

14.1.1.1. Urease

14.1.1.2. Toxins

14.1.2. GERD

14.1.3. Peptic Ulcer Disease

14.2. Gallstones

14.2.1. 80% cholesterol

14.2.2. 20% bilirubin and calcium

14.2.2.1. pigment stones

14.2.3. Very painful

14.2.4. Surgical gallbladder removal

15. Other Body System Intergrations

15.1. Acid/Base Balance Mechanism

15.2. Endocrine System

15.2.1. GI Hormones

15.3. Immune Barrier

16. Secretion

16.1. Stomach

16.1.1. Gastric

16.1.1.1. Epithelium

16.1.1.1.1. Exocrine

16.1.1.1.2. Endocrine

16.1.1.2. Acid

16.1.1.2.1. Alkaline Tide

16.1.1.2.2. Protein digestion

16.1.1.2.3. Bacteriocidal

16.1.1.2.4. Bone digestion

16.1.1.2.5. K+/H+ ATPase

16.1.1.2.6. Secretagogues

16.1.1.2.7. Anti-secretagogues

16.1.1.3. Other

16.1.1.3.1. Gastric lipase

16.1.1.3.2. Gelatinase

16.1.1.3.3. Gastric amylase

16.1.2. Control

16.1.2.1. Cephalic Phase

16.1.2.1.1. sight

16.1.2.1.2. smell

16.1.2.1.3. thought

16.1.2.1.4. Medulla Oblongata

16.1.2.1.5. Histamine

16.1.2.1.6. Gastrin

16.1.2.2. Gastric Phase

16.1.2.2.1. Triggered by food

16.1.2.2.2. Gastrogastric reflex

16.1.2.2.3. Negative feedback at pH <2

16.1.2.3. Intestinal Phase

16.1.2.3.1. Enterogastric reflex

16.1.2.3.2. Anti-secreto.

16.1.2.3.3. motility

16.2. Small intestine

16.2.1. Pancreas

16.2.1.1. Endocrine

16.2.1.1.1. [Blood sugar] control

16.2.1.1.2. Insulin

16.2.1.1.3. Glucagon

16.2.1.2. Exocrine

16.2.1.2.1. Enzymes

16.2.1.2.2. Out through pancreatic duct

16.2.1.2.3. Aqueous

16.2.1.3. Control

16.2.1.3.1. secretion

16.2.2. Liver

16.2.2.1. Bile production

16.2.2.1.1. Bile acids

16.2.2.1.2. Bicarbonate

16.2.2.1.3. by Secretin

16.2.3. Gallbladder

16.2.3.1. Bile acids

16.2.3.1.1. Re-absorption

16.2.3.1.2. made by hepatocytes

16.2.3.1.3. oxidation of cholesterol

16.2.3.1.4. cholesterol synthesis = very energy consuming

16.2.3.1.5. 20-30 mg/day secreted

16.2.3.1.6. bile salts

16.2.3.2. Concentrated bile

16.2.3.2.1. 5-15x

16.2.3.3. stores 30-60 ml

16.2.3.4. ~500 ml/day

16.2.3.5. Emptying control

16.2.3.5.1. CCK

16.2.3.5.2. Weak vagus nerve stimulation

16.2.4. Paneth cells

16.2.4.1. Control

16.2.5. Control