Question

The inspiratory reserve volume + tidal volume + expiratory reserve volume is that the similar as
 (A) inspiratory capacity + expiratory reserve volume
 (B) total lung capacity - functional residual capacity
 (C) inspiratory capacity + functional residual capacity
 (D) inspiratory capacity + residual volume

Answer 1

Hint: capacity is that the total amount of air exhaled after a maximal inhalation. The worth is about 4800mL and it varies consistent with age and body size. It's evaluated by totalling tidal volume, inspiratory reserve volume, and expiratory reserve volume.
VC=TV+IRV+ERV

Complete answer:
Lung volumes also are referred to as respiratory volumes. It refers to the quantity of gas within the lungs at a given time during the respiratory cycle. Lung capacities are derived from a summation of various lung volumes. These volumes tend to vary, figuring on the profoundness of respiration, nationality, gender, age, body composition.
Lung volumes:
> Tidal volume (TV) : it's the quantity of air that will be inhaled or exhaled during one respiratory cycle. This depicts the functions of the respiratory centers, respiratory muscles, and therefore the mechanics of the lung and chest wall.
> Inspiratory Reserve Volume (IRV) : it's the amount of air that will be forcibly breathed after a conventional tidal volume. IRV is typically kept in reserve but is employed during deep breathing. the traditional adult value is 1990-3300 ml
> Expiratory Reserve Volume (ERV) : it's the quantity of air that will be exhaled forcibly after exhalation of regular tidal volume. The traditional adult value is 700-1200ml.
> Residual volume (RV) : Volume of air remaining within the lungs after a maximal exhalation.
Lung capacities:
> Inspiratory capacity (IC) : Maximum volume of air which will be inhaled following a resting state.
> Total Lung capacity (TLC) : Maximum volume of air the lungs can accommodate or sum of all volume compartments or volume of air within the lungs after a maximum inspiration.
> Vital Capacity (VC) : Total amount of air exhaled after a maximal inhalation.

Option A- inspiratory capacity + expiratory reserve volume
Inspiratory reserve volume (IRV) + tidal volume + expiratory reserve volume (ERV) represents capacity . Now, inspiratory capacity is the total volume of air that will be inhaled after a traditional expiration. It includes tidal volume and inspiratory reserve volume that's IC= TV+IRV

Option B- total lung capacity - functional residual capacity
This option isn't correct because the above value and capacity are explained

Option C- inspiratory capacity +functional residual capacity
This possibility is additionally not correct.

Option D- inspiratory capacity + residual volume
This option isn't an accurate answer

Thus the right option may be a which says that capacity is IRV+TV+ ERV=IC + ERV

Note: The capacity represents the change in volume from completely emptied lungs to completely filled lungs. In humans, capacity may be a crucial measure of an individual's respiratory health.