Bio 2301 Digestion and Nutrition Review UPDATED ACTUAL Exam Questions and CORRECT Answers

Bio 2301 Digestion and Nutrition Review
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Chemical digestion of Carbohydrates begins in the ______ by the ______ ______ ______ -
CORRECT ANSWER - Oral Cavity (Mouth)
Salivary Amylase Enzyme


Acid Reflux into the esophagus is normally prevented by the - CORRECT ANSWER -
Lower Esophageal Sphincter


The Physiological process of swallowing is coordinated by the center found in the - CORRECT
ANSWER - Medulla



From External to Internal, the layers of the stomach are: - CORRECT ANSWER - Serosa
Muscularis
Submucosa
Mucosa


Gastric Mixing changes a bolus into - CORRECT ANSWER - Chyme



Protein Digestion begins where in the digestive tract? - CORRECT ANSWER - The
Stomach


Bile from the liver AND digestive juices from the pancreas enter which section of the small
intestine? - CORRECT ANSWER - Duodenum



Bile is produced by the - CORRECT ANSWER - Liver

, Bile is stored in the - CORRECT ANSWER - gallbladder



What is the function of bile? - CORRECT ANSWER - To emulsify fat (Making fat water-
soluble)


90% of absorption happens in the - CORRECT ANSWER - Small Intestine



The three phases of gastric secretion are: - CORRECT ANSWER - Cephalic
Gastric
Intestinal


Motility and secretion in the stomach happens in the - CORRECT ANSWER - Cephalic
Phase


What stimulates the cephalic phase of gastric secretion? - CORRECT ANSWER -
Thought, smell, sight, and taste


The ______ phase inhibits gastric secretion - CORRECT ANSWER - intestinal


Involuntary muscle contractions which move a bolus through the gastrointestinal tract are called
- CORRECT ANSWER - Peristalsis


When chyme enters the duodenum, gastric secretion (Increases/Decreases)? - CORRECT
ANSWER - Decreases


The enzyme pepsin is formed from pepsinogen through the action of ______ - CORRECT
ANSWER - hydrochloric acid (HCl)



Which enzyme functions at the lowest pH? - CORRECT ANSWER - pepsin