Q. Which of the following statements regarding cilia is not correct?
A) The organised beating of cilia is controlled by fluxes of $Ca^{+}$across the membrane
B) Cilia are hair-like cellular appendages
C) Microtubules of cilia are composed of tubulin
D) Cilia contain an outer ring of nine doublet microtubules surrounding two single microtubules
Explanation
The mechanism of ciliary movement is not completely under stood. It is known that the microtubules behave as sliding filament that move past one another much like the sliding filaments of vertebrate skeletal muscle. The fluxes of $Ca^{2 +}$across the membrane is not responsible for controlling the organised beating of cilia.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.