Ch.24 Digestive System Flashcards
Structures of Digestive System(4)⭐️
-Ingestion of Food
-Digestion of Food into nutrients
-Absorption of Nutrients
-Removal of wastes(fecal matter)
2 Types of Digestion & meaning⭐️
• Mechanical: breaks large food particles to small (chewing)
• Chemical: breaking of covalent bonds by digestive enzymes (chewing w/ saliva)
Major Digestive Organs(OcPESSiLiRA)⭐️
Oral Cavity(mouth), Pharynx, Esophagus, Stomach, Small intestine, Large Intestine, Rectum, Anus
Accessory Digestive Organs(SgLGbP)⭐️
Salivary glands, Liver, Gallbladder, Pancreas
also: tongue, teeth, & secrete glands
Digestive Tract
Tube from mouth to anus, MD organs, also Gastrointestinal Tract or GI Tract
Subunits of Carbs, Proteins, Lipids
C- Monosaccharides
P- Amino Acids
L- Glycerol attached to fatty acids (Triglycerides)
Swallowing of food⭐️
Deglutition
Functions of Digestive System(7)⭐️
Ingestion: food into oral cavity/mouth
Mastication: process of chewing
Propulsion: food into GI Tract
Mixing: movement of food back & forth
Secretion: lubricate, liquefy, digest
Digestion, Absorption, & Elimination
Type of movement in large intestine
Mass movement of mixing waves in stomach
The Sequence of Secretion (lubricate, liquify, digest)
Mucus lubricates
Water liquifies
Enzymes digest
Digestive Tract food process between 1:oral cavity and 2:pharynx (Peristalsis)⭐️
Bolus of food
DT: Portions of 2:Pharynx (2)⭐️
3)Oropharynx
4)Laryngopharynx
DT: Sphincter between 5:Esophagus & 6:Stomach ⭐️
Cardiac Sphincter (involuntary control)
DT: Sphincter between 6:Stomach & (Small intestine) 7: Duodenum⭐️
Pyloric Sphincter (involuntary control)
DT: Portions of Small Intestine⭐️
7: Duodenum (proximal)
8: Jejunum (middle)
9: Ileum (distal)
DT: Food process between 7: Duodenum & 8: Jejunum ⭐️
Chyme
Portions of Large Intestine(10) ⭐️
(C,Ac,Tc,Dc,Hf,Sf,Sc,R,Ac,A)
10:Cecum 11: Ascending Colon
12: Transverse Colon 13: Descending Colon 14: Hepatic fixture 15: Splenic fixture 16: Sigmoid colon 17:Rectum
18: Anal canal 19: Anus
DT:Sphincter between (small intestine) 9:Ileum and 10: Cecum
Ileocecal sphincter (involuntary control)
DT: Food portion btw 13: Descending colon and 14: Sigmoid colon⭐️
Fecal matter
Duct T: Makes up the Biliary Tract near 7:Duodenum(3)⭐️
Liver, Gallbladder, Pancreas
Where is colon cancer normally in⭐️
Large intestine
DT:Bend between Ascending colon & Transverse colon⭐️
14:Hepatic Fixure (Right colonic flexure)
DT: Bend between Transverse colon and descending colon⭐️
15:Splenic flexure (left colonic flexure)
ToF: The Biliary Tract is part of Digestive Tract⭐️
False
5 major sphincters⭐️
Cardiac, Pyloric, Ileocecal, Internal anal, External anal
Another word for Cardiac Sphincter⭐️
Lower Esophageal Sphincter
What makes the stomach so acidic?⭐️
HCl (hydrochloric acid)
PH of stomach(HCl)⭐️
2
DT: Deeper Sphincter between Rectum and Anus⭐️
Internal Anal Sphincter (involuntary control)
DT: Superficial Sphincter between Rectum and Anus⭐️
External Anal Sphincter (voluntary control)
Only Sphincter with voluntary control⭐️
External Anal Sphincter
DT: Food Process Order ⭐️
Bolus of food 👉🏽 Chyme 👉🏽 Fecal matter
Layers in Mucosa (3)
Epithelium (innermost)
Lamina Propria (middle)
Muscularis mucosae (outermost)
Found In Submucosa layer
Submucosa glands
Found in Muscularis Externa(3)⭐️
Inner Oblique muscle layer
Middle Circular muscle layer
Outer Longitudinal muscle layer
Found in Serosa(2)⭐️
Connective tissue layer
Simple squamous epithelium
Exception of having smooth muscle in Muscularis externa⭐️
Esophagus (1/3) not smooth(striated)
ToF: Esophagus contains both striated and smooth muscles ⭐️
True, top 1/3 is striated
Portions of Esophagus⭐️
1/3: striated
————————————————
2/3: transitioning zone (to smooth)
3/3: smooth muscle
Digestive Tract Histology from Deepest to Superficial layer
Mucosa, Submucosa, Muscularis externa, Serosa
4 Mesenteries in Peritoneum⭐️
Greater Omentum
Lesser Omentum
Mesentary proper
Mesocolon
In Chemical regulation, what increases HCl secretion?
Gastrin
Stimulate pancreas to release bicarbonates to neutralize acid(s)
Secretin
Location of Lesser Omentum
Inferior aspect of liver & extends to medial curvature of stomach
Location of Greater Omentum
In between lateral curvature of Stomach & Transverse colon
Location of Mesocolon
Found in between portions of Large intestine & posterior wall of Abdomen, around transverse colon
Location of Mesentery proper (ac)⭐️
Small intestine against posterior wall of abdominal/abdomen cavity
Portions of the Oral Cavity(Anterior, Posterior, Superior, Inferior,Lateral)⭐️
Ant- lips
Post- fauces (opening of pharynx)
Sup- hard & soft palate
INF- tongue
Lat- buccinator
What cranial nerve for tongue movement?⭐️
Hypoglossal
What anterior nerve deals with taste buds?
Facial nerve
Posterior taste bud nerve is ⭐️
Glossopharyngeal nerve
Base of tongue nerve⭐️
Vegus nerve
Two sets of teeth & number
-Primary,Childhood,Deciduous(20)
-Secondary,Permeant(32)
Types and numbers in EACH
quadrant⭐️
• Incisors (2): Central and lateral
• Canines (1)
• Premolars (2): 1st and 2nd
• Molars (3): 1st, 2nd, and 3rd
What tooth is considered wisdom tooth?⭐️
3rd Molar
Tooth: Outermost layer of
anatomical crown. Non-living;
acellular. Protective.
Enamel
Tooth: living, cellular, calcified tissue
Dentin
Tooth: hold tooth in socket
Periodontal ligament
What are the 3 pairs of salivary glands from largest to smallest⭐️
parotid, submandibular, and sublingual
What is the hollow J-shape muscular organ?⭐️
Stomach
What prevents food from entering the nasal cavity?
Soft palate
When the cardiac sphincter opening is not tightly closed what happens?⭐️
Acid reflux(heartburn)
Stomach: Esophagus opens into this part (beginning)
Cardia
Stomach: To the left and above the cardia
Fundus
Stomach: largest part with greater and lesser curvatures
Body
Stomach: pyloric antrum (widest part) and pyloric canal – opens into the small intestine
through the pyloric orifice.
Pylorus
Ridges in stomach⭐️
Rugae
Name for Grooves in stomach⭐️
Gastric pits
What is GERD⭐️
Gastroesophageal Reflux Disease
Gastro-eso-phageal
Esophagus: Produces Mucus
Mucous producing cells
Stomach: Produce Mucus ⭐️
Mucus producing cells
Stomach: Produce Pepsinogen(bc of HCl)⭐️
Chief Cells
Stomach: Produces Hydrochloric acid(HCl) & Intrinsic Factor(IF)⭐️
Parietal cells
Stomach: Produces histamine that binds to H2 receptors(increase HCl production)⭐️
ECL cells
Enterochromaffin-like(ECL)
Stomach: Produces Gastrin(increase HCl production) ⭐️
G Cells
Stomach: Produces Somatostatin (DECREASES HCl production)⭐️
Delta Cells (&)
Stomach: Binds w/ vitamin B12(If)⭐️
Intrinsic Factor in Parietal cells
ToF: Histamine will increase HCl production⭐️
True
Function of HCl: Chief cells(3)⭐️
• Kills bacteria
• Denatures proteins
• Helps convert pepsinogen to pepsin
Which stomach curvature is medial⭐️
Lesser curvature
The presence of HCl acid turns on inactive pepsinogen to what⭐️
Active pepsin
EC: Gastric/peptic/duodenal ulcers are all most commonly caused by a bacteria. What bacteria is it (underline when writing)⭐️
Helicobactor pylori (underline)
—————— ——-
Helico-bactor py-lori
Which phase of stomach regulation is activated by the sight, smell, and anticipation of food⭐️
Cephalic Phase/ 1st phase
Which phase of stomach regulation has a continued production of HCl acid so it can digest food⭐️
Gastric phase /2nd phase
Which phase of stomach regulation begins emptying food into the duodenum and now decreases HCl production⭐️
Intestinal phase/ 3rd phase
T/F If HCl production decreases, that means somatostatin levels are high⭐️
True
What are the ridges and grooves called in the small intestine⭐️
plicae circulares
Small Intestine: produce mucus⭐️
Goblet cells
Small Intestine: immune cells⭐️
Paneth cells
Small Intestine: Produce Secretin, decrease HCI production, and promote bicarbonate ion secretion⭐️
S Cells
Which cells in the small intestine produce Cholecystokinin (CCK)⭐️
I Cells
Absorbs majority of nutrients⭐️
Small intestine
The __ produces bile, which gets sent to the __ to become concentrated and released into the __ by the biliary tract
Liver, gallbladder, duodenum
This causes contractions in gallbladder⭐️
Cholecystokinin
Liver: Lobes on the anterior view⭐️
Right lobe
Left lobe
Liver: Separates the right lobe and left lobe⭐️
Falciform ligament
Liver: Lobes in Inferior view (4)⭐️
Quad rate lobe
Right lobe
Caudate lobe
Left Lobe
Liver: Produces Bile(H) ⭐️
Hepatocyte
Liver: Where is Bile concentrated?⭐️
Gallbladder
Liver: Hepatic phagocytes ⭐️
Kupffer Cells
Liver: Makes up portal triad⭐️(3)
Hepatic duct
Hepatic portal vein
Hepatic artery
Functions of Liver(5)⭐️
-Bile Production(bile salts emulsify liquid)
-Storage of nutrients
-Processing of nutrients
-Detoxification
-Synthesis of new molecules
Nutrients the liver stores
Glycogen, fats, Vitamins A, B12, D, E, K
Nutrient that the liver hydroxylates⭐️
Vitamin D
Gallbladder stone located in the common bile duct⭐️
Choledocholithiasis
What is the exocrine function of the pancreas?⭐️
Produce digestive enzymes
Pancreas: Produce Glucagon / Endocrine function⭐️
Alpha cell
Pancreas: Produce insulin⭐️
Beta Cell
Pancreas: produce somatostatin⭐️
Delta cell
Pancreas: converts Trysinogen to Trypsin ⭐️
Enterokinase
Pancreas: converts Chymotrypsinogen to Chymotrysin & Procarboxypeptidase to Carboxypeptidase⭐️
Trypsin
Purpose of Pancreatic amylase & Pancreatic lipase⭐️
PA- digest carbs
PL- digest fat/lipids
In Pancreas, what duct merges w/ common bile duct⭐️
Main pancreatic duct
BT: Common hepatic duct + cystic duct =
Common bile duct
Large Intestine functions(3)⭐️
-Reabsorb water from fecal matter
-Form fecal matter
-Contain bacteria then produce vitamin K
Components of micelle(2)
Bile salts & fatty acids
Components of chylomicron⭐️
Protein coat & lipidd
What is a protein coated lipid?⭐️
Lipoprotein