Practice Specialized Cells: Cells That Perform Specific Functions (e.g., Muscle Cells, Nerve Cells, Red Blood Cells). (5.1)

Practice: Specialized Cells: Cells that perform specific functions (e.g., muscle cells, nerve cells, red blood cells).

Lesson 5.1Cell Biology

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10 questions

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6 sample questions

Question 1.
Name three specialised animal cells and state the function of each.
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Think of the three examples in the lesson title.
Question 2.
Why do mammalian red blood cells have no nucleus?
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What fills a red blood cell?
3Question 3.
Which feature helps a red blood cell take up oxygen quickly?
- Its biconcave disc shape
- Its long axon
- Its beating cilia
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Think about surface area.
4Question 4.
What does the myelin sheath do?
- It insulates the axon and speeds up impulses
- It stores oxygen for the nerve cell
- It helps the nerve cell divide
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Compare it with the coating on an electrical cable.
Question 5.
Choose either the sperm cell or the palisade mesophyll cell. Describe three of its features and explain how each one suits the cell to its function. Then explain why a "general-purpose" cell would do the job less well.
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For each feature, say what it is and then how it helps the cell's function.
Question 6.
Assume an adult has about 25 trillion red blood cells and that each lives for about 120 days. Roughly how many new red blood cells must the bone marrow produce every second to keep the number steady? Show your working.
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Convert 120 days into seconds first.

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