BIOD 151 EXAM 3 WITH ACTUAL
COMPLETE QUESTIONS AND CORRECT
SOLUTIONS | VERIFIED BY EXPERT|
NEWLY UPDATED 2025| GUARANTEED
A+.
Q: Explain why someone who has hypergastrinemia (excessive secretion of gastrin) might
develop gastric/stomach ulcers.
A: Gastrin stimulates the secretions of pepsinogens and hydrochloric acid. Excess amounts
would lead to erosion of the stomach lining. ✔✔
Q: Explain why a patient with liver disease would have intolerance to fatty foods.
A: The liver produces bile, which breaks down fats. If it is not producing bile (or less bile), fats
will not be broken down effectively. ✔✔
Q: Food enters the stomach from the __________ via the _________ sphincter. Food exits
the stomach via the ____________ sphincter into the___________.
A:
Food enters the stomach from the esophagus via the cardiac sphincter.
Food exits the stomach via the pyloric sphincter into the small intestine. ✔✔
Q: What are the functions carried out by the small intestine?
A:
Digestion: Chemical digestion continues with enzymes from pancreatic juices breaking
down starches, proteins, and beginning fat digestion. Mechanical digestion continues as
bile breaks down fat into smaller pieces.
Absorption: Digested food molecules, water, and fat are absorbed into the bloodstream.
✔✔
, Q: Name and explain the four main functions performed by the digestive system.
A:
Ingestion: The process of food entering the mouth.
Digestion: The breakdown of food through mechanical and chemical processes.
Absorption: The movement of digested food into the bloodstream.
Defecation: The excretion of indigestible food through the anus. ✔✔
Q: Describe parietal cells and chief cells: name their location, secretions, and purposes.
A:
Parietal cells: Located in the stomach body, secrete hydrochloric acid to generate a pH
of 1.3-3.5. This kills bacteria and stops salivary amylase activity. It is also essential for
activating pepsin.
Chief cells: Secrete pepsinogen, which is converted into the active enzyme pepsin by
hydrochloric acid, aiding in protein breakdown. ✔✔
Q: Match the digestive organ with the one substance it produces:
Pancreas: Lipase
Liver: Urea
Mouth: Salivary Amylase ✔✔
Q: What is the purpose of the hormone Leptin?
A: Decrease hunger, increase satiety. ✔✔
Q: What is the purpose of the hormone Ghrelin?
A: Increase hunger, decrease satiety. ✔✔
Q: Which of the following statements is false?
A. Taste buds are located on the surface of the mouth and the wall of the pharynx.
B. The ileocecal valve controls the entrance of chyme into the small intestine.
C. The gall bladder, teeth, and tongue are considered accessory organs to the digestive
system.
COMPLETE QUESTIONS AND CORRECT
SOLUTIONS | VERIFIED BY EXPERT|
NEWLY UPDATED 2025| GUARANTEED
A+.
Q: Explain why someone who has hypergastrinemia (excessive secretion of gastrin) might
develop gastric/stomach ulcers.
A: Gastrin stimulates the secretions of pepsinogens and hydrochloric acid. Excess amounts
would lead to erosion of the stomach lining. ✔✔
Q: Explain why a patient with liver disease would have intolerance to fatty foods.
A: The liver produces bile, which breaks down fats. If it is not producing bile (or less bile), fats
will not be broken down effectively. ✔✔
Q: Food enters the stomach from the __________ via the _________ sphincter. Food exits
the stomach via the ____________ sphincter into the___________.
A:
Food enters the stomach from the esophagus via the cardiac sphincter.
Food exits the stomach via the pyloric sphincter into the small intestine. ✔✔
Q: What are the functions carried out by the small intestine?
A:
Digestion: Chemical digestion continues with enzymes from pancreatic juices breaking
down starches, proteins, and beginning fat digestion. Mechanical digestion continues as
bile breaks down fat into smaller pieces.
Absorption: Digested food molecules, water, and fat are absorbed into the bloodstream.
✔✔
, Q: Name and explain the four main functions performed by the digestive system.
A:
Ingestion: The process of food entering the mouth.
Digestion: The breakdown of food through mechanical and chemical processes.
Absorption: The movement of digested food into the bloodstream.
Defecation: The excretion of indigestible food through the anus. ✔✔
Q: Describe parietal cells and chief cells: name their location, secretions, and purposes.
A:
Parietal cells: Located in the stomach body, secrete hydrochloric acid to generate a pH
of 1.3-3.5. This kills bacteria and stops salivary amylase activity. It is also essential for
activating pepsin.
Chief cells: Secrete pepsinogen, which is converted into the active enzyme pepsin by
hydrochloric acid, aiding in protein breakdown. ✔✔
Q: Match the digestive organ with the one substance it produces:
Pancreas: Lipase
Liver: Urea
Mouth: Salivary Amylase ✔✔
Q: What is the purpose of the hormone Leptin?
A: Decrease hunger, increase satiety. ✔✔
Q: What is the purpose of the hormone Ghrelin?
A: Increase hunger, decrease satiety. ✔✔
Q: Which of the following statements is false?
A. Taste buds are located on the surface of the mouth and the wall of the pharynx.
B. The ileocecal valve controls the entrance of chyme into the small intestine.
C. The gall bladder, teeth, and tongue are considered accessory organs to the digestive
system.
