Exam 21: The Digestive System

Construct a functional map showing the relationships of the following terms involved with gastric secretion. chief cell D cell ECL cell enteric sensory neuron G Cell gastrin H? histamine parietal cell pepsin pepsinogen somatostatin vagus nerve Where appropriate, indicate stimulatory or inhibitory effect.Terms may be added as needed.

Powerful contractions that occur a few times each day in the colon are called

Which of the following statements is True about GI muscle contractions?

During defecation,

A(n)________ digests terminal peptide bonds to release amino acids.

Diagram typical intestinal absorption of peptides.Begin with the arrival of a protein in the lumen of the small intestine, and continue the diagram until the absorbed peptides reach the hepatic portal vein.Include in your diagram the enzymes and transporters that might be involved; and label the intestinal lumen, the apical and basolateral membranes the peptides might cross, and the anatomical pathway the absorbed peptides would take to reach the hepatic portal vein.

Match the hormone with the correct statement. -smooth muscle of duodenum is a target

Vitamin ________ must be complexed with a protein called ________ to be absorbed from the small intestine.

The release of many GI tract hormones is stimulated by a particular food or substance.Which hormone is INCORRECTLY paired with its stimulus?

The exocrine portion of the pancreas consists of lobules called ________, which secrete ________.

The ________ is a "housekeeping function" that sweeps food remnants and bacteria out of the upper GI tract and into the large intestine.

Match the hormone with the correct statement. -inhibits gastric emptying

Defects in which channel lead to the disease cystic fibrosis? Which ion does this channel transport?

The three sections of the small intestine, in order according to movement of its contents, are

In the body, 80% of all lymphocytes, a type of immune system cell, are thought to be present in the

Match the hormone with the correct statement. -stimulates insulin release

Match the hormone with the correct statement. -secreted by cells in the stomach

The primary products of protein digestion are ________, ________, and ________.

Decreased levels of bile salts in the bile would interfere with digestion of

Draw a cell that secretes HCl into the lumen of the stomach, selecting transporters and/or enzymes from the following list (you may or may not need them all): chloride channel CFTR channel GLUT4 carbonic anhydrase H⁺-K⁺-ATPase Cl⁻ - HCO₃⁻ Antiport Cl⁻ - HCO₃⁻ Symport Na⁺-K⁺-ATPase Label the cell showing the lumen, interstitial fluid, the basolateral membrane, and the apical membrane.