Table of contents

1. Introduction to Biology2h 42m
2. Chemistry3h 37m
3. Water1h 26m
4. Biomolecules2h 23m
5. Cell Components2h 26m
6. The Membrane2h 31m
7. Energy and Metabolism2h 0m
8. Respiration2h 40m
9. Photosynthesis2h 49m
10. Cell Signaling59m
11. Cell Division2h 47m
12. Meiosis2h 0m
13. Mendelian Genetics4h 44m
14. DNA Synthesis2h 27m
15. Gene Expression3h 6m
16. Regulation of Expression3h 31m
17. Viruses37m
- Viruses
  37m
18. Biotechnology2h 58m
19. Genomics17m
- Genomes
  17m
20. Development1h 5m
21. Evolution3h 1m
22. Evolution of Populations3h 53m
23. Speciation1h 37m
24. History of Life on Earth2h 6m
25. Phylogeny2h 31m
26. Prokaryotes4h 59m
27. Protists1h 12m
28. Plants1h 22m
29. Fungi36m
- Fungi
  19m
- Fungi Reproduction
  17m
30. Overview of Animals34m
- Overview of Animals
  34m
31. Invertebrates1h 2m
32. Vertebrates50m
33. Plant Anatomy1h 3m
34. Vascular Plant Transport1h 2m
- Water Potential
  1h 2m
35. Soil37m
- Soil and Nutrients
  20m
- Nitrogen Fixation
  16m
36. Plant Reproduction47m
- Flowers
  33m
- Seeds
  14m
37. Plant Sensation and Response1h 9m
38. Animal Form and Function1h 19m
39. Digestive System1h 10m
- Digestion
  1h 3m
- Blood Sugar Homeostasis
  7m
40. Circulatory System1h 49m
41. Immune System1h 12m
42. Osmoregulation and Excretion50m
- Osmoregulation and Excretion
  50m
43. Endocrine System1h 4m
- Endocrine System
  1h 4m
44. Animal Reproduction1h 2m
- Animal Reproduction
  1h 2m
45. Nervous System1h 55m
- Neurons and Action Potentials
  1h 8m
- Central and Peripheral Nervous System
  46m
46. Sensory Systems46m
- Sensory System
  46m
47. Muscle Systems23m
- Musculoskeletal System
  23m
48. Ecology3h 11m
49. Animal Behavior28m
- Animal Behavior
  28m
50. Population Ecology3h 41m
51. Community Ecology2h 46m
52. Ecosystems2h 36m
53. Conservation Biology24m
- Conservation Biology
  24m

39. Digestive System

Digestion

General Biology

39. Digestive System

Digestion

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1: minutes

Problem 2

Textbook Question

Evaluate the following statements regarding digestion; select True or False for each statement.
T/F Salivary amylase completes the digestion of starch into monosaccharides.
T/F Pepsin digests proteins in the stomach.
T/F Trypsin digests disaccharides into monosaccharides.
T/F Pancreatic lipase performs the majority of chemical digestion of lipids.

Verified step by step guidance

Understand the role of salivary amylase: Salivary amylase begins the digestion of starch in the mouth by breaking it down into smaller polysaccharides and maltose, but it does not complete the digestion into monosaccharides. Therefore, evaluate the statement about salivary amylase accordingly.

Examine the function of pepsin: Pepsin is an enzyme in the stomach that breaks down proteins into smaller peptides. It is active in the acidic environment of the stomach. Consider this information when evaluating the statement about pepsin.

Consider the role of trypsin: Trypsin is an enzyme produced by the pancreas and released into the small intestine, where it continues the digestion of proteins into smaller peptides. It does not digest disaccharides into monosaccharides. Use this knowledge to assess the statement about trypsin.

Analyze the function of pancreatic lipase: Pancreatic lipase is crucial for lipid digestion, breaking down triglycerides into fatty acids and glycerol in the small intestine. This enzyme performs the majority of chemical digestion of lipids. Reflect on this when evaluating the statement about pancreatic lipase.

For each statement, apply your understanding of the specific enzyme's function and location in the digestive process to determine whether the statement is true or false.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Salivary Amylase

Salivary amylase is an enzyme produced by the salivary glands that initiates the digestion of starches in the mouth. It breaks down starch into maltose and dextrins, but does not complete the digestion into monosaccharides, as further digestion occurs in the small intestine with other enzymes.

Pepsin

Pepsin is a protease enzyme that is active in the acidic environment of the stomach. It is responsible for breaking down proteins into smaller peptides, initiating protein digestion. Pepsin is secreted as pepsinogen and activated by stomach acid, playing a crucial role in the digestive process.

Pancreatic Lipase

Pancreatic lipase is an enzyme secreted by the pancreas into the small intestine, where it performs the majority of lipid digestion. It breaks down triglycerides into free fatty acids and monoglycerides, facilitating absorption. This enzyme is essential for the efficient digestion and absorption of dietary fats.

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