INTRODUCTION
CELL ORGANELLES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which cell extension allows substances to move across the cell’s surface?
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flagella
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microvilli
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cilia
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None of the above
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Explanation:
Detailed explanation-1: ->Cilia:-Cilia are short hair like structures. They are used to move the entire cell or help in the movement of substances along the outer surface of the cell. Cilia are present in many numbers. They extend along the entire surface of the plasma membrane.
Detailed explanation-2: -20 Flagella and Cilia Flagella (singular = flagellum) are long, hair-like structures that extend from the plasma membrane and are used to move an entire cell, (for example, sperm, Euglena).
Detailed explanation-3: -The molecular motors, dyneins, power the ciliary beat. The dyneins are compacted into inner and outer dynein arms, whose activity is highly regulated to produce microtubule sliding and axonemal bending.
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