Chapter 24: The Digestive System Flashcards
What ligament attaches the liver to the anterior abdominal wall and diaphragm
Falciform ligament
What are the three stages of Deglutition?
1) Voluntary
2) Pharyngeal
3) Esophageal
What secretes Gastrin? What is Gastrins Fx. ?
G cells of the gastric glands in stomach
Fx. Secrete gastric juice, contracts (LES), increases motility of stomach, relaxes pyloric sphincter
Alimentary Canal is another name for
A) gastrointestinal tract
B) Accessory Digestive Tract
A) GI tract
True or False, mechanical digestion is the breakdown of large carbohydrates, lipids, and proteins into smaller molecules
False: Mechanical digestion involves cutting of food by teeth and movement through the GI tract
True or False the Teeth Are part of the alimentary canal
False they are considered an accessory digestive organ
What are the 4 Layers of the GI tract from deep to superficial
Mucosa->submucosa->muscularis->serosa
What ENS plexus controls GI motility? What ENS plexus controls secretion?
Motility->Myenteric Plexus
secretion->submucosal plexus
What plexus is found btw the 2 layers of the muscularis?
Myenteric plexus
What cells produce hydrochloric acid ?
Parietal cells
What does the pancreatic duct travel with as it enters the duodenum?
Common bile duct
Pancreatic amylase acts on food where? What does is break down?
it acts on food in duodenum and it continues breakdown of starch
What enzymes get released from the pancreas and function to breakdown protein?
Trypsin
Chymotrypsin
Carboxypeptidase
Elastase
What brush border enzyme will activate trypsinogen to form trypsin?
Enterokinase
What two enzymes in pancreatic juice digest nucleic acids?
Ribonuclease and deoxyribonuclease
