Table of contents

1. Introduction to Biology2h 42m
2. Chemistry3h 40m
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 12m
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

11. Cell Division

Introduction to Cell Division

General Biology

11. Cell Division

Introduction to Cell Division

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Multiple Choice

Which of the following best describes the zone of cell hypertrophy in an epiphyseal plate?

Chondrocytes undergo rapid mitosis to increase cell number.

Osteoblasts deposit bone matrix on calcified cartilage.

Chondrocytes enlarge and their lacunae expand, causing the matrix to thin.

Chondrocytes die and the matrix begins to calcify.

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Verified step by step guidance

Understand the context: The epiphyseal plate, also known as the growth plate, is a region of cartilage found in growing bones. It is responsible for longitudinal bone growth and consists of several zones, each with distinct cellular activities.

Identify the zone of cell hypertrophy: This zone is characterized by the enlargement of chondrocytes (cartilage cells). These cells increase in size rather than dividing, which is distinct from the rapid mitosis seen in the zone of proliferation.

Explain the process: In the zone of hypertrophy, the chondrocytes enlarge, and their lacunae (the spaces they occupy) expand. This enlargement causes the surrounding cartilage matrix to thin, preparing the area for subsequent calcification and ossification.

Clarify why other options are incorrect: For example, rapid mitosis occurs in the zone of proliferation, not hypertrophy. Osteoblast activity and matrix calcification occur later in the ossification process, beyond the hypertrophic zone.

Summarize the correct description: The zone of cell hypertrophy is best described as the region where chondrocytes enlarge, their lacunae expand, and the matrix thins, setting the stage for further bone development.