Questions and Answers
What is the defining characteristic of an animal cell?
Lacks a cell wall
What is the primary function of collagen in animal cells and tissues?
Binding cells together in an extracellular matrix
What is the role of sodium and potassium in cells?
Transmission of nerve impulses and muscle contraction
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?
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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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