Problem 46 - Objective Biology for NEET

Question

Match the following: 1\. Tidal Volume - A. \(2500-3000 \mathrm{ml}\) of air 2\. Inspiratory reserve volume B. \(1000-1100 \mathrm{ml}\) of air 3\. Expiratory reserve volume C. \(500 \mathrm{ml}\) of air 4\. Residual volume D. \(3500-4600 \mathrm{ml}\) of air 5\. Vital capacity - E. \(1100-1200 \mathrm{ml}\) of air (a) \(1-\mathrm{C}, 2-\mathrm{D}, 3-\mathrm{B}, 4-\mathrm{A}, 5-\mathrm{E}\) (b) \(1-\mathrm{C}, 2-\mathrm{A}, 3-\mathrm{B}, 4-\mathrm{E}, 5-\mathrm{D}\) (c) \(1-\mathrm{C}, 2-\mathrm{A}, 3-\mathrm{D}, 4-\mathrm{E}, 5-\mathrm{B}\) (d) \(1-\mathrm{E}, 2-\mathrm{A}, 3-\mathrm{B}, 4-\mathrm{E}, 5-\mathrm{D}\)

Step-by-Step Solution

Answer

The correct matching is option (b): \(1-\mathrm{C}\), \(2-\mathrm{A}\), \(3-\mathrm{B}\), \(4-\mathrm{E}\), \(5-\mathrm{D}\).

Step 1: Understand the Definitions

Before proceeding, it's critical to understand what each term means: \n Tidal Volume is the amount of air inhaled or exhaled during regular breathing. \n Inspiratory Reserve Volume is the extra amount of air that can be inhaled beyond regular inspiration. \n Expiratory Reserve Volume is the additional amount of air that can be exhaled beyond normal exhalation. \n Residual Volume is the volume of air remaining in the lungs after a maximal exhalation. \n Vital Capacity is the total amount of air that can be exhaled after maximal inspiration.

Step 2: Match the Values

By comparing the values to the typical volumes and capacities, the correct associations are: Tidal Volume of 500 ml (\(1-\mathrm{C}\)), Inspiratory Reserve Volume of 2500-3000 ml (\(2-\mathrm{A}\)), Expiratory Reserve Volume of 1000-1100 ml (\(3-\mathrm{B}\)), Residual Volume of 1100-1200 ml (\(4-\mathrm{E}\)), and the Vital Capacity of 3500-4600 ml (\(5-\mathrm{D}\)). Therefore, the correct match is option (b).

Step 3: Confirm the Answer

It's always good practice to confirm the answer by checking if it makes sense. Here, the values for each term in option (b) align with the general knowledge of lung volumes and capacities, confirming that it is indeed the correct answer.

Key Concepts

Tidal Volume

Tidal Volume is a fundamental concept in understanding lung volumes and capacities. It refers to the amount of air you inhale or exhale with each regular breath. This volume is typically about 500 milliliters (ml) in a healthy adult.
During tidal breathing, your body maintains a balanced intake and release of air, making this process effortless.

• Tidal Volume allows for the exchange of oxygen and carbon dioxide between the lungs and the atmosphere.
• It is stable and changes significantly only during intense physical activity.

This measurement serves as a baseline for evaluating other respiratory volumes and understanding overall lung function.

Inspiratory Reserve Volume

Inspiratory Reserve Volume (IRV) represents the additional air that you can inhale after taking a normal breath. It's like having a spare capacity for your lungs when you need it. Typically, this extra volume ranges from 2500 to 3000 ml in adults.
The inspiratory reserve is crucial during situations demanding more oxygen, such as exercising or when holding your breath.

• It highlights the lung's ability to stretch and expand beyond normal levels.
• IRV is tested in medical settings to assess lung elasticity and strength.

Understanding IRV helps predict how well your lungs can cope with increased demands.

Expiratory Reserve Volume

Expiratory Reserve Volume (ERV) is the amount of air you can force out of your lungs after a normal exhalation. This volume usually ranges from 1000 to 1100 ml.
By fully utilizing ERV, you maximize the expulsion of carbon dioxide from your body.

• ERV shows your lung's efficiency in expelling air.
• It helps in evaluating obstructive lung conditions where exhalation becomes difficult.

A good expiratory reserve indicates a healthy and responsive respiratory system capable of adjusting to various conditions.

Residual Volume

Residual Volume (RV) is the air that remains in your lungs even after you've exhaled as much as you can. This volume is about 1100 to 1200 ml in a healthy adult.
Residual volume ensures that there's always a buffer of air in the lungs, preventing their collapse.

• Maintains a reserve of oxygen essential for continuous blood oxygenation even between breaths.
• Provides structural stability to the lungs and prevents conditions like atelectasis.

Knowing your RV is important for understanding your lung's basal capacity and overall respiratory health.

Vital Capacity

Vital Capacity (VC) is defined as the total amount of air that can be exhaled after a maximal inhalation. Typically, this value ranges from 3500 to 4600 ml.
Vital capacity is an indicator of lung health, reflecting both the volume of air inhaled and the strength of exhalation.

• It's used to assess the physical capability of lungs, especially in athletic performance and respiratory rehabilitation.
• Vital capacity can vary with age, sex, body size, and physical fitness.

It is an essential measurement in diagnosing and monitoring lung diseases, giving a comprehensive overview of how well the lungs function.