The Question is from neet-zoology chemical-coordincation-and-integration , and it was created by the author K SUNKANNA

Question

What is the primary function of the zona pellucida?

K SUNKANNA · Accepted Answer

## CORE INFORMATION
✓ **Answer**: B
## CONCEPT FRAMEWORK
 **Primary Concept**: Female reproductive physiology, fertilization
 **Related Topics**: Oocyte development, sperm-egg interaction, acrosome reaction
 **Prerequisites**: Basic understanding of human reproductive system
## SOLUTION PATHWAY
**Given Information**:
The question asks about the primary function of the zona pellucida.
**Method & Steps**:
1. Understanding the zona pellucida:
  Reasoning: The zona pellucida is a glycoprotein layer surrounding the oocyte (egg cell).
  Formula/Rule: N/A
2. Analyzing the options:
  Working:  Let's evaluate each option:
  Option A (Nourishes the developing oocyte): While the zona pellucida provides some structural support, its primary function is not nourishment.
  Option B (Facilitates sperm binding and acrosomal reaction): This is the correct answer. The zona pellucida contains specific receptors that bind to sperm, triggering the acrosomal reaction, which is essential for fertilization.
  Option C (Triggers ovulation): Ovulation is triggered by a surge in luteinizing hormone (LH), not the zona pellucida.
  Option D (Forms the corpus luteum): The corpus luteum is formed from the remnants of the follicle after ovulation.
 3. Final Step:
  Result: The primary function of the zona pellucida is to facilitate sperm binding and the acrosomal reaction.
  Verification: This aligns with established knowledge of human reproductive biology.
## OPTION ANALYSIS
A :x: Nourishing the oocyte is a secondary function at best; the primary function is related to fertilization.
B ✓: Correctly identifies the primary role of the zona pellucida in facilitating sperm-egg interaction.
C :x: Ovulation is a hormonal process, not a function of the zona pellucida.
D :x: The corpus luteum formation is a post-ovulatory event, unrelated to the zona pellucida's function.
## LEARNING AIDS
 **Common Mistakes**:
  1. Confusing the zona pellucida's function with other processes in the reproductive cycle (e.g., ovulation, corpus luteum formation):  Focus on the specific interactions between sperm and egg.
  2. Overlooking the acrosomal reaction: Remember that sperm binding is not the only function; the triggering of the acrosomal reaction is equally crucial.
 **Quick Tips**:
  1. Remember the 'Z' in zona pellucida as a reminder of its role in the 'Zygote' formation.
  2. Visualize the sperm penetrating the zona pellucida during fertilization.

K SUNKANNA · Answer

Nourishes the developing oocyte

K SUNKANNA · Answer

The correct Option is "Facilitates sperm binding and acrosomal reaction"

K SUNKANNA · Answer

Triggers ovulation

K SUNKANNA · Answer

Forms the corpus luteum

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