Related Experiment Video

Updated: Jul 12, 2026

Measurement of the Pressure-volume Curve in Mouse Lungs
09:49

Measurement of the Pressure-volume Curve in Mouse Lungs

Published on: January 27, 2015

Genetic influence on normal variability of maximum expiratory flow-volume curves

S F Man, N Zamel

    Journal of Applied Physiology
    |December 1, 1976
    PubMed
    Summary

    Genetic factors significantly influence the geometry of large airways, as indicated by more similar maximum expiratory flow-volume (MEFV) curves in identical twins. This suggests a hereditary component in airway structure affecting airflow dynamics.

    More Related Videos

    Combining Volumetric Capnography And Barometric Plethysmography To Measure The Lung Structure-function Relationship08:25

    Combining Volumetric Capnography And Barometric Plethysmography To Measure The Lung Structure-function Relationship

    Published on: January 8, 2019

    Employing the Forced Oscillation Technique for the Assessment of Respiratory Mechanics in Adults06:11

    Employing the Forced Oscillation Technique for the Assessment of Respiratory Mechanics in Adults

    Published on: February 9, 2022

    Related Concept Videos

    Respiratory Volumes01:15

    Respiratory Volumes

    Respiratory volumes are crucial metrics, meticulously measured to quantify the air exchanged in and out of the lungs during various phases of the breathing cycle. These precise measurements are vital for assessing lung function, diagnosing respiratory conditions, and monitoring overall respiratory health. Each parameter provides specific insights into the mechanics of breathing and the functional capacity of the lungs.
    Tidal Volume (TV) Tidal volume (TV) is the air inhaled or exhaled in a...
    Respiratory Capacities01:24

    Respiratory Capacities

    Respiratory capacities are crucial indicators of lung function, representing the maximum amount of air an individual's respiratory system can handle during various breathing phases.
    One key metric is the Inspiratory Capacity (IC), which represents the maximum amount of air that can be inhaled with full effort. IC is calculated by summing the tidal volume and inspiratory reserve volume, typically ranging from 2.4 to 3.6 liters.
    The Functional Residual Capacity (FRC) represents the air in the...
    Pressure Relationships in Thoracic Cavity01:24

    Pressure Relationships in Thoracic Cavity

    Breathing, otherwise known as pulmonary ventilation, is the process of air movement into and out of the lungs. The main mechanisms propelling pulmonary ventilation are atmospheric pressure (Patm), intra-pulmonary (Ppul ) or intra-alveolar pressure (Palv) within the alveoli, and intrapleural pressure (Pip) within the pleural cavity.
    Breathing Mechanisms
    Both intra-alveolar and intrapleural pressures rely on specific lung properties. The ability to breathe—allowing air to enter the lungs during...
    Factors Affecting Pulmonary Ventilation01:19

    Factors Affecting Pulmonary Ventilation

    Besides the pressure difference between the external environment and the lungs, the airflow rate and ease of pulmonary ventilation are also influenced by three other factors: surface tension of the fluid in the alveoli, compliance of the lungs, and airway resistance.
    Alveolar Surface Tension
    The alveolar fluid lines the luminal surface of the alveoli and exerts a force called surface tension. This force is caused by the polar water molecules in the liquid being more strongly attracted to each...
    Respiratory Volumes and Capacities01:22

    Respiratory Volumes and Capacities

    The respiratory system is responsible for the intake of oxygen and the expulsion of carbon dioxide from the body. Respiratory volumes describe the volume of air in the lungs at different phases of the respiratory cycle. Tidal volume is the air breathed in and out during normal, quiet breathing. Inspiratory reserve volume is the air that can be forcefully inspired beyond the tidal volume. In contrast, expiratory reserve volume refers to the air that can be expelled from the lungs after a normal...
    Gene-Environment Interactions01:20

    Gene-Environment Interactions

    Gene expression is a dynamic process that is significantly influenced by environmental factors. This interaction underlies the complex nature of biological development and the phenotypic differences observed among individuals, even among those with identical genetic makeups. Factors such as radiation, temperature, behavior, nutrition, and stress play pivotal roles in determining how genes are expressed. The concept of the reaction range is central to understanding this interaction. It posits...