The Question is from neet-zoology breathing-and-exchange-of-gases respiratory-volumes-and-capacities, and it was created by the author K SUNKANNA

Question

During strenuous exercise, which of the following respiratory volumes increases significantly compared to its resting value?

K SUNKANNA · Accepted Answer

## CORE INFORMATION
✓ **Answer**: C
## CONCEPT FRAMEWORK
 **Primary Concept**: Respiratory volumes and their changes during exercise
 **Related Topics**: Pulmonary ventilation, gas exchange, oxygen consumption, carbon dioxide production
 **Prerequisites**: Understanding of tidal volume, inspiratory reserve volume, expiratory reserve volume, and residual volume.
## SOLUTION PATHWAY
**Given Information**:
  The question asks which respiratory volume increases significantly during strenuous exercise compared to rest.
  We need to consider the changes in lung volumes during increased physical activity.
**Method & Steps**:
 1. Analyze the impact of exercise on breathing.
  Reasoning: During strenuous exercise, the body's demand for oxygen increases significantly.  To meet this increased demand, the rate and depth of breathing increase.
 2. Consider how each respiratory volume changes.
  Working: 
            * **Tidal Volume (TV):** This is the volume of air inhaled and exhaled during a normal breath.  During exercise, both the rate and depth of breathing increase, leading to a substantial increase in tidal volume.
            * **Inspiratory Reserve Volume (IRV):** This is the extra volume of air that can be inhaled beyond a normal breath. While it might increase slightly during exercise, the increase is not as significant as that of tidal volume.
            * **Expiratory Reserve Volume (ERV):** This is the extra volume of air that can be exhaled beyond a normal breath.  This volume may decrease slightly during exercise as the body focuses on efficient inhalation.
            * **Residual Volume (RV):** This is the volume of air remaining in the lungs after maximal exhalation.  This volume remains relatively constant and is not significantly affected by exercise.
 3. Identify the respiratory volume with the most significant increase.
  Result: Tidal volume (TV) shows the most significant increase during strenuous exercise.
  Verification:  The increased demand for oxygen necessitates a larger volume of air exchanged with each breath, which directly translates to a larger tidal volume.
 ## OPTION ANALYSIS
A :x: Residual volume remains relatively constant and is not affected significantly by exercise.
B :x: Expiratory reserve volume may slightly decrease during exercise.
C ✓: Tidal volume increases significantly during exercise to meet the increased oxygen demand.
D :x: Inspiratory reserve volume increases, but not as significantly as tidal volume.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing tidal volume with other respiratory volumes:  Understanding the definition of each volume is crucial.
  2.Failing to consider the physiological changes during exercise:  Remember the increased oxygen demand and its impact on breathing.
 **Quick Tips**:
  1.Focus on the changes in breathing rate and depth during exercise.
  2.Remember that tidal volume is the volume exchanged per breath.

K SUNKANNA · Answer

Residual volume

K SUNKANNA · Answer

Expiratory reserve volume

K SUNKANNA · Answer

The correct Option is "Tidal volume"

K SUNKANNA · Answer

Inspiratory reserve volume

NEET Zoology Breathing And Exchange Of Gases Respiratory Volumes And Capacities MCQs

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