The Question is from neet-botany mineral-nutrition , and it was created by the author Mr. NARESH KUMAR K

Question

Root hairs are important for ion uptake primarily because they:

Mr. NARESH KUMAR K · Accepted Answer

## CORE INFORMATION
✓ **Answer**: C
## CONCEPT FRAMEWORK
 **Primary Concept**: Plant physiology, specifically nutrient uptake by roots.
 **Related Topics**: Surface area, diffusion, osmosis, active transport.
 **Prerequisites**: Understanding of plant root structure and function.
## SOLUTION PATHWAY
**Given Information**:
  The question asks about the primary reason for the importance of root hairs in ion uptake.
  Options describe different roles root hairs might play.
**Method & Steps**:
 1. Analyze the role of root hairs in ion uptake.
  Reasoning: Root hairs are long, thin extensions of epidermal cells in roots. Their main function is to increase the surface area available for absorption of water and nutrients from the soil.
  Formula/Rule:  No specific formula is applicable here.
 2. Evaluate each option against the primary function of root hairs.
  Working: 
       * Option A (Store absorbed ions): While root cells do store ions, this is not the primary reason root hairs are important for ion uptake. 
       * Option B (Actively transport ions into the xylem): Active transport is crucial for ion uptake, but it happens within the root cells, not solely due to the increased surface area provided by root hairs.
       * Option C (Increase the surface area for absorption): This directly relates to the primary function of root hairs. A larger surface area allows for greater contact with the soil solution, facilitating more efficient ion absorption.
       * Option D (Synthesize carrier proteins for ion transport): Carrier proteins are involved in ion transport, but their synthesis is not the primary reason root hairs are important for ion uptake. The increased surface area they provide is more crucial.
 3. Conclude based on the analysis.
  Result: The primary reason root hairs are important for ion uptake is that they increase the surface area for absorption.
  Verification: The large surface area of root hairs maximizes contact with the soil solution, allowing efficient absorption of ions through diffusion and active transport.
 ## OPTION ANALYSIS
A :x: Storing absorbed ions is a secondary function; increasing surface area is primary.
B :x: Active transport is important, but it’s not the main reason root hairs are essential for uptake. The increased surface area facilitates active transport, but is not the transport itself.
C ✓: Correct. The significantly increased surface area is the primary reason root hairs are crucial for efficient ion uptake.
D :x: While carrier proteins are needed for ion transport, it's the increased surface area provided by the root hairs that allows for more efficient use of these proteins.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing the role of root hairs with other functions of root cells (e.g., transport to xylem): Focus on the primary function of increasing surface area.
  2.Overlooking the importance of surface area in absorption processes: Remember that a larger surface area facilitates more efficient absorption.
 **Quick Tips**:
  1.Visualize the structure of root hairs and their extensive network in the soil.
  2.Remember that efficient absorption requires maximal contact between the root and the soil solution.

Mr. NARESH KUMAR K · Answer

Store absorbed ions

Mr. NARESH KUMAR K · Answer

Actively transport ions into the xylem

Mr. NARESH KUMAR K · Answer

The correct Option is "Increase the surface area for absorption"

Mr. NARESH KUMAR K · Answer

Synthesize carrier proteins for ion transport

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