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BIO 108 Exam 3 (100+ Questions) – Digestive System | Enzymes, GI Tract, Liver, Pancreas, Absorption

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This document features an extensive compilation of over 100 graded questions and verified answers from BIO 108 Exam 3 for the academic year 2025/2026. The content focuses entirely on the Digestive System, covering all major components of digestion, absorption, and organ structure-function relationships. It includes highly detailed material on digestive enzymes and substrates (e.g., amylase, lipase, pepsin, trypsin), biomolecule breakdown pathways (carbohydrates, proteins, lipids, nucleic acids), anatomy and physiology of the GI tract, as well as liver, gallbladder, and pancreas functions (including bile secretion, enterohepatic circulation, and hormonal control). The structure of the alimentary canal and the associated peritoneal layers and reflexes (ENS, myenteric and submucosal plexuses) are also thoroughly covered. This document is particularly valuable for undergraduate students in Human Biology, Anatomy & Physiology, Nutrition, Pre-Med, Pre-Nursing, Biological Sciences, or Health Sciences programs. It also serves as a practical resource for students preparing for practical exams, lab tests, and comprehensive finals. Each question is answered with clarity and precision, making it ideal for self-study, peer tutoring, or academic review sessions. Keywords: digestive enzymes, salivary amylase, pancreatic lipase, bile salts, carbohydrate digestion, protein digestion, lipid digestion, nucleic acids, pepsin, trypsin, duodenum, jejunum, ileum, brush border, liver function, hepatocytes, gallbladder, bile duct, pancreas, acini, islets of Langerhans, absorption, segmentation, peristalsis, GI tract, mucosa, serosa, muscularis, enteric nervous system, myenteric plexus, submucosal plexus, enterohepatic circulation, mechanical digestion, chemical digestion

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BIO 108
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BIO 108

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BIO 108 Exam 3 Digestive System
2025/2026 Exam Questions and Answers
| A+ Score Assured



carbohydrates substrates - 🧠 ANSWER ✔✔starch


dextrin

maltose

lactose

sucrose


carbohydrates enzymes - 🧠 ANSWER ✔✔amylase (salivary and

pancreatic)

dextrinase

maltase

,lactase

sucrase


carbohydrates: monosaccharides - 🧠 ANSWER ✔✔glucose, fructose,

galactose


carbohydrates: disaccharides - 🧠 ANSWER ✔✔sucrose, lactose, maltose


carbohydrates: polysaccharides - 🧠 ANSWER ✔✔dextrose, starch,

cellulose, glycogen

When amylase breaks down starch, what is produced? - 🧠 ANSWER

✔✔maltose and dextrin


what enzyme breaks down starch? - 🧠 ANSWER ✔✔amylase (salivary and

pancreatic)


where is salivary amylase released? - 🧠 ANSWER ✔✔oral cavity


where is salivary amylase functional? - 🧠 ANSWER ✔✔oral cavity


where is pancreatic amylase released? - 🧠 ANSWER ✔✔pancreas


where is pancreatic amylase functional? - 🧠 ANSWER ✔✔small intestine


what enzyme breaks down dextrine? - 🧠 ANSWER ✔✔dextrinase

, when dextrinase breaks down dextrin, what is the product? - 🧠 ANSWER

✔✔glucose x6


where is dextrinase released? - 🧠 ANSWER ✔✔small intestine (BB)


where is dextrinase functional? - 🧠 ANSWER ✔✔small intestine (BB)


which enzyme breaks down maltose? - 🧠 ANSWER ✔✔maltase


when maltase breaks down maltose, what is the product? - 🧠 ANSWER

✔✔glucose x2


where is maltase released? - 🧠 ANSWER ✔✔small intestine (BB)


where is maltase functional? - 🧠 ANSWER ✔✔small intestine (BB)


which enzyme breaks down lactose? - 🧠 ANSWER ✔✔lactase


when lactase breaks down lactose, what is the product? - 🧠 ANSWER

✔✔glucose and galactose


where is lactase released? - 🧠 ANSWER ✔✔small intestine (BB)


where is lactase functional? - 🧠 ANSWER ✔✔small intestine (BB)


which enzyme breaks down sucrose? - 🧠 ANSWER ✔✔sucrase


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