Which of the following statements regarding c | vedclass

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(B) The correct answer is $B$. Cilia are fine,hair-like,vibratile cytoplasmic processes found on certain cell types. Their movement either propels the

Vedclass · Accepted Answer

The organized beating of cilia is controlled by fluxes of $Ca^{2+}$ across the membrane.

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(B) The correct answer is $B$. Cilia are fine,hair-like,vibratile cytoplasmic processes found on certain cell types. Their movement either propels the organism or moves the surrounding medium past a fixed cell. Cilia are enclosed by a unit membrane,which is an extension of the plasma membrane. Within the membrane is a fluid matrix containing a supporting axial shaft called the axoneme. The axoneme typically shows a $9+2$ arrangement,where nine doublets of microtubules are arranged in a ring around two central singlet microtubules. These microtubules are composed of globular units of the protein tubulin. The arms of the $A$ microtubules contain the protein dynein,which acts as an $ATPase$ enzyme to catalyze the hydrolysis of $ATP$ to $ADP$,providing energy for ciliary movement. Statement $B$ is incorrect because the beating of cilia is primarily driven by the sliding of microtubule doublets powered by dynein-mediated $ATP$ hydrolysis,not by $Ca^{2+}$ fluxes across the membrane.

Which of the following statements regarding cilia is not correct?

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