Lab 13.2

Explain how the forms of the stomach follow their functions.

3 layers of smooth muscle allow it to churn food

Peritonitis is an infection of the fluid in the peritoneal cavity. Why do you think this condition might be difficult to treat? Why would this condition have a wide ranging effects on the abdominal organs?

Because there is no direct blood supply to the peritoneal cavity. Because peritonial cavity contain many organs.

What will happen to these enzymes in the stomach? Will the enzymes continue to function once they reach the small intestine? Why?

Enzymes destroyed by pepsin in stomach. Useless.

How does the absorption of lipids differ from the absorption of carbohydrates and proteins?

Lipids are packaged different and don't fit into capillaries, must enter lacteal instead.

Why is the digestion and absorption of lipids more complex than the digestion and absorption of carbohydrates and proteins?

Lipids aren't water soluble and require an extra step to be broken down.

One of the common consequence of gallstones is blockage of the common bile duct, which prevents bile from being emptied into the duodenum. Predict the possible consequences of this condition.

Nonpigmented poop and undigested fats in poop.

The condition known as heart burn is most often caused by acid regurgitation from the stomach into the esophagus. Why do you think the acid tends to burn the esophagus and produce pain but does not similarly burn the stomach?

Stomach has goblet cells which secrete a mucus that lines the stomach and protects it. The esophagus doesnt have protective mucus.

The excorine cells of the pancreas are called _____________ and secrete___________, The endocrine cells of the pancreas are called _______________ and secrete __________.

acinar cells, enzymes and HCO3, pancreatic islets, hormones

Explain how the forms of esophagus follow their function.

muscular tube that allows it to perform peristalsis

Explain why detergents are able to remove both water based and oil base stains.

polar parts interact with water based stains, nonpolar parts interact with lipid based stains.

Explain how the forms of the small intestine follow their function.

small folds give it large surface area for absorption