Exam 40: Digestion and Absorption

Which of the processes of mechanical digestion involves the esophagus?

The hormone thought to be a messenger causing release of digestive enzymes from the intestinal mucosa is:

The main proteases found in gastric juice are pepsin and trypsin.

Substances that activate proenzymes are often called kinases.

The enzyme amylase is produced by the:

Which of the following is not true of enzymes?

Explain the difference between transcellular absorption and paracellular absorption. What can be absorbed by means of paracellular absorption?

Secretin causes the production of pancreatic fluid high in enzyme content but low in bicarbonate.

Rotavirus can cause what life-threatening condition in infants?

The disaccharide maltose is made up of which two saccharide units?

Chewing and swallowing are both considered mechanical digestion.

Zymogenic cells secrete enzymes into the lumen of the small intestines.

Explain the mechanism of absorption for water-soluble nutrients.

Match each primary mechanism of the digestive system with its corresponding definition. -Movement of digested nutrients through the GI mucosa and into the internal environment

Match each primary mechanism of the digestive system with its corresponding definition. -Process of taking food into the mouth, starting it on its journey through the digestive tract

Which of the following is not one of the openings that must be blocked when food moves from the pharynx into the esophagus?

Amino acids are the end products of protein digestion.

Both simple sugars and amino acids are absorbed into the blood in the intestinal capillaries.

Segmentation is different from peristalsis because:

Mechanical digestion reduces the size of ingested food, which increases the surface area of the food making chemical digestion more efficient.