exam 4 a&p 2

Which is not a function of the digestive system?

• Absorption

• Ingestion

• Secretion

• Micturition

• Elimination

Which organ is not part of the gastrointestinal tract?

• Esophagus

• Large intestine

• Stomach

• Oral cavity

• Liver

Which organ is not considered an accessory digestive organ?

• Tongue

• teeth

• Pancreas

• Salivary glands

• Pharynx

A sphincter is a

• thickening of the longitudinal layer of the muscularis that propels materials through the GI tract.

• thickening of the circular layer of the muscularis that controls movement of materials through the GI tract.

• fold of the mucosa of the GI tract that increases the total surface area for absorption of nutrients.

• circle of adventitia that anchors the GI tract to neighboring structures.

Mechanoreceptors and chemoreceptors are found in the

• adventitia of the upper portion of the GI tract.

• epithelium of the inferior portion of the GI tract.

• mucosa and submucosa of the GI tract along its length.

• myenteric plexus of the mucosa of the intestine.

• muscularis interna of the entire length of the GI tract.

If a fatty meal has been ingested, the liver and gallbladder need to be alerted about the need for bile. The receptors that are responsible for sensing the fat in the ingested food are referred to as

• bilireceptors.

• Mechanoreceptors.

• chemoreceptors.

• omental neurons

• osmodetectors.

An enzyme found within saliva is salivary

• pancreatase.

• Nuclease.

• amylase.

• Protease.

• Pepsin.

The inferior esophageal sphincter is also known as the

• cardiac sphincter.

• pyloric sphincter.

• pharyngoesophageal sphincter.

• pharyngealgastric sphincter.

• esophageal hiatus.

Stenosis (constriction) of the pyloric sphincter would interfere with

• passage of bile and pancreatic juice into the duodenum.

• Peristalsis.

• passage of a bolus into the stomach.

• passage of chyme into the duodenum.

• mucus secretion.

Villi

• are found throughout the gastrointestinal tract.

• generate movement of materials in the large intestine.

• increase surface area in the small intestine.

• contain both smooth and skeletal muscle fibers.

• All of the choices are correct.