“Cellular & Sexual Reproduction

[Pages:26]"Cellular & Sexual Reproduction"

Class R1

Warm-up

Complete the cryptogram on Cell Reproduction Review

CELLS ARE PRODUCED BY MITOSIS OR MEIOSIS

Cellular Growth Objectives ? Explain why cells are relatively small.

? Summarize the primary stages of the cell cycle.

? Describe the stages of interphase.

Cellular Growth

? When the cell reaches its size limitation: ?It will stop growing ?It will divide

Tik Tok Mitosis Mitosis Rap



Cell Size Limitations

? Most cells are less than 100um (100 x 10-6m)in diameter.

Ratio of surface area to volume ? Key factor that limits cell size ? Surface area ? area covered by the plasma

membrane ? Equation: length x width x # of sides ? Volume ? space taken up by the inner contents of the cell (organelles, cytoplasm, & nucleus) ? Equation: length x width x height

Cell Size Limitations

If a cell has a high surface area to volume ratio, then it can more effectively:

? Transport food & oxygen in the cell ? Transport waste & carbon dioxide out of the cell ? Communicate within the cell

Why are cells small?

Why are cells small?

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