The Question is from neet-zoology locomotion-and-movement , and it was created by the author Mr. BALACHANDRA.N

Question

A unique characteristic of the ciliary movement is its:

Mr. BALACHANDRA.N · Accepted Answer

## CORE INFORMATION
✓ **Answer**: D
## CONCEPT FRAMEWORK
 **Primary Concept**: Ciliary movement and its characteristics
 **Related Topics**: Microtubules, flagella, cell motility
 **Prerequisites**: Basic understanding of cell biology and movement mechanisms.
## SOLUTION PATHWAY
**Given Information**:
  The question asks for a unique characteristic of ciliary movement.
**Method & Steps**:
 1. Analyze each option to determine if it's a characteristic of ciliary movement and if it's unique.
  Reasoning: We need to compare the given options with the known mechanisms of ciliary movement and other cellular movement mechanisms.
 2. Evaluate each option against the characteristics of ciliary movement.
  Working:
  A. Dependence on calcium ions for power stroke: While calcium ions play a role in various cellular processes including ciliary movement, it's not unique to cilia.  Other cellular movements also utilize calcium.
  B. Presence of a central sheath connecting microtubule doublets: This is a structural feature of cilia, but not unique. Flagella also possess a similar structure.
  C. Sliding filament mechanism involving actin and myosin: This is characteristic of muscle contraction and some other forms of cellular movement, but not cilia. Cilia utilize microtubules, not actin and myosin.
  D. Metachronal rhythm leading to unidirectional flow: This is a unique characteristic of cilia. The coordinated beating of cilia in a wave-like pattern creates a unidirectional flow of fluid.
 3. Identify the unique characteristic.
  Result: The metachronal rhythm leading to unidirectional flow is the unique characteristic of ciliary movement.
  Verification:  The coordinated, wave-like beating pattern of cilia is well-established and distinguishes it from other forms of cellular movement.
 ## OPTION ANALYSIS
A :x: Dependence on calcium ions is not unique to ciliary movement.
B :x: The presence of a central sheath is a structural feature shared with flagella.
C :x: Ciliary movement utilizes microtubules, not the actin-myosin system.
D ✓: Metachronal rhythm and resulting unidirectional flow are unique to ciliary movement.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing ciliary movement with other forms of cellular movement (e.g., muscle contraction): Understanding the distinct mechanisms involved is crucial.
  2.Failing to recognize the significance of metachronal rhythm: This is the key distinguishing feature of ciliary movement.
 **Quick Tips**:
  1.Remember the key structural components of cilia (microtubules) and how they are arranged.
  2.Visualize the coordinated wave-like beating of cilia to understand metachronal rhythm.

Mr. BALACHANDRA.N · Answer

Dependence on calcium ions for power stroke

Mr. BALACHANDRA.N · Answer

Presence of a central sheath connecting microtubule doublets

Mr. BALACHANDRA.N · Answer

Sliding filament mechanism involving actin and myosin

Mr. BALACHANDRA.N · Answer

The correct Option is "Metachronal rhythm leading to unidirectional flow"

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