Chapter 23 Lab Quiz
The exocrine cells of the pancreas are called ___ and secrete ___. The endocrine cells of the pancreas called ___ and secrete ____.
Acrinar cells, pancreatic jucices, islets, insulin and glucagon
Why is the digestion and absorption of lipds more complex than the digestion and absorption of carbohydrates and proteins?
Because lipids are nonpolar molecules that do no dissolve in the water-based environment of the small intestine
Emulsifies/emulsify fats
Bile Salts
Digestive enzymes associated with the enterocytes of the small intestine
Brush border enzymes
Protein-coated lipid droplets that are absorbed
Chylomicrons
The gallbladder produces and stores bile
False, get rid of produces
The peritoneal cavity is located between the visceral peritoneum and the mesentery.
False, parietal peritoneum
The longest segment of the small intestine is the duodenum
False, smallest
Which of the following organs is not part of the alimentary canal? -Esophagus -Gallbladder -Cecum -Ileum
Gallbladder
Required to activate pepsinogen
Hydrochloric Acid
The structure(s) into which lipids are absorbed
Lacteal
How does the absorption of lipids differ from the absorption of carbohydrates and proteins?
Lipid absorption is more complicated because lipids are nonpolar and cannot be transported as free fatty acids through the water-filled plasma of the blood. Carbs and proteins are broken down by enzymes and then are digested in the small intestines.
Clusters of bile salts and digested lipids
Micelles
Enzymes that digests lipids into free fatty acids and monoglycerides
Pancreatic lipase
Protein-digesting enzyme produced by the stomach
Pepsin
Begins carbohydrate digestion in the mouth
Salivary Amylase
The liver consists of plates of hexagonal liver lobules
True
The small intestine features three sets of progressively smaller folds that increase surface area for absorption.
True
The stomach has three layers of smooth muscle that contract to churn food into chyme.
True
Protein-digesting enzyme produced by the pancreas
Trypsin