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Questions and Answers
What is the defining characteristic of an animal cell?
What is the defining characteristic of an animal cell?
- Enclosed by a rigid cell wall
- Contains chloroplasts for food formation
- Similar in size to plant cells
- Lacks a cell wall (correct)
What is the primary function of collagen in animal cells and tissues?
What is the primary function of collagen in animal cells and tissues?
- Aiding in cell division
- Facilitating photosynthesis
- Storing excess nutrients
- Binding cells together in an extracellular matrix (correct)
What is the role of sodium and potassium in cells?
What is the role of sodium and potassium in cells?
- Transmission of nerve impulses and muscle contraction (correct)
- Facilitating cell wall formation
- Aiding in photosynthesis
- Assisting in protein synthesis
Which elements form 95% of the cell's structure?
Which elements form 95% of the cell's structure?
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What distinguishes the binding of plant and fungal eukaryotic cells from animal cells?
What distinguishes the binding of plant and fungal eukaryotic cells from animal cells?
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Study Notes
Cell Structure and Components
- The defining characteristic of an animal cell is the absence of a cell wall.
Collagen Function
- The primary function of collagen in animal cells and tissues is to provide structural support and maintain tissue integrity.
Ion Function
- Sodium and potassium play a crucial role in cells, maintaining the proper balance of electrolytes and regulating various cellular processes, including nerve impulses and muscle contractions.
Cell Composition
- Carbon, oxygen, nitrogen, and hydrogen form 95% of the cell's structure, highlighting the importance of these elements in cellular makeup.
Cell Wall Differences
- Unlike plant and fungal eukaryotic cells, which have a rigid cell wall composed of cellulose and chitin, respectively, animal cells lack a cell wall, distinguishing them from other eukaryotic cells.
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