Gastrointestinal System Worksheet

In which region of the gastrointestinal system tract are Peyer's patches common?

• stomach

• sigmoid colon

• ileum

• jejunum

Which of the following organs has 3 layers of smooth muscle in its muscularis externa?

• small intestine

• esophagus

• rectum

• stomach

The __________ cells secrete _____________, the enzyme precursor which begins the chemical digestion of proteins.

• parietal, HCl

• Parietal, gastrin

• chief, gastrin

• Chief, pepsinogen

The muscularis externa of the upper third of the esophagus is controlled by _____________.

• voluntary action (swallowing)

• involuntary movements only

• facilitated action

• both voluntary and involuntary movements

Most of the nutrient absorbtion along the alimentary canal occurs in the _______________.

• ascending colon

• cecum

• stomach

• jejunum

The specific tissue type of the submucosa is _________________.

• dense irregular connective tissue

• simple squamous epithelium

• adipose tissue

• hyaline cartilage

The enzyme which begins carbohydrate digestion is named ____________ _____________.

• salivary amylase

• trypsin

• lipase

• nuclease

Chemical digestion of carbohydrates begins at ____________.

• oral cavity

• stomach

• duodenum

• jejunum

The G cells of the stomach secrete the hormone ____________, which stimulates the __________ and __________ cells.

• gastrin, chief, parietal

• lipase, parietal, D cells

• secretin, chief, parietal

• gastrin, D cells, parietal