The Question is from neet-zoology breathing-and-exchange-of-gases , and it was created by the author T HARITHA

Question

A unique feature of the avian respiratory system is the presence of air sacs. Which of the following is NOT a function of these air sacs?

T HARITHA · Accepted Answer

## CORE INFORMATION
✓ **Answer**: C
## CONCEPT FRAMEWORK
 **Primary Concept**: Avian Respiratory System
 **Related Topics**: Air sacs, unidirectional airflow, gas exchange, bird physiology
 **Prerequisites**: Basic understanding of respiratory systems and gas exchange.
## SOLUTION PATHWAY
**Given Information**:
  The question asks to identify the function NOT performed by avian air sacs.
  Options describe potential functions: weight reduction, airflow management, gas exchange, and unidirectional airflow maintenance.
**Method & Steps**:
 1. Analyze each option to determine its validity as a function of avian air sacs.
  Reasoning: Avian air sacs are known to play a crucial role in efficient respiration in birds, enabling unidirectional airflow and efficient gas exchange.
  Formula/Rule: N/A
 2. Identify the option that does not accurately describe a function of the air sacs.
  Working: Let's examine each option:
      a) Reduce the weight of the bird: Air sacs are lightweight and contribute to overall bird weight reduction.
      b) Act as bellows to move air through the lungs: Air sacs act as bellows, driving air flow through the lungs in a unidirectional manner.
      c) Direct gas exchange with the blood: Gas exchange primarily occurs in the parabronchi (tiny air capillaries) within the lungs, not directly within the air sacs.
      d) Help maintain a unidirectional airflow through the lungs: Air sacs are essential for maintaining this unidirectional flow.
  Key Point:  Air sacs themselves do not participate in direct gas exchange; that happens in the lungs.
 3. Select the option that is NOT a function of the air sacs.
  Result: Option C (Direct gas exchange with the blood) is not a function of the air sacs.
  Verification: The other options are well-established functions of avian air sacs.
 ## OPTION ANALYSIS
A ✓: Air sacs are lightweight and contribute to the bird's overall low weight.
B :x: Air sacs act as bellows, helping to move air through the lungs.
C :x: Gas exchange occurs primarily in the parabronchi within the lungs, not in the air sacs themselves.
D :x: The air sacs play a vital role in maintaining unidirectional airflow through the avian respiratory system.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing the role of air sacs with the lungs: Air sacs are not the primary site of gas exchange; the lungs are.
      [How to avoid]: Remember that air sacs primarily manage airflow, while the lungs are responsible for gas exchange.
  2.Overlooking the unidirectional flow:  The unique unidirectional flow is a key feature of the avian respiratory system, facilitated by the air sacs.
      [How to avoid]: Understand how the air sacs contribute to this efficient system.
 **Quick Tips**:
  1.Visualize the avian respiratory system: Diagrams can help understand the flow of air through the lungs and air sacs.
  2.Remember the key function: Air sacs are primarily for efficient airflow, not direct gas exchange.

T HARITHA · Answer

Reduce the weight of the bird

T HARITHA · Answer

Act as bellows to move air through the lungs

T HARITHA · Answer

The correct Option is "Direct gas exchange with the blood"

T HARITHA · Answer

Help maintain a unidirectional airflow through the lungs

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