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Name the important parts involved in cre...

Name the important parts involved in creating a pressure gradient between lungs and the atmosphere during normal respiration.

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To answer the question regarding the important parts involved in creating a pressure gradient between the lungs and the atmosphere during normal respiration, we can break down the process into several key components: ### Step-by-Step Solution: 1. **Diaphragm**: - The diaphragm is a dome-shaped muscle located at the base of the thoracic cavity. During inhalation (inspiration), the diaphragm contracts and moves downward, increasing the volume of the thoracic cavity. This action decreases the pressure inside the lungs compared to the atmospheric pressure, allowing air to flow into the lungs. 2. **Intercostal Muscles**: ...
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Knowledge Check

  • Assertion : The abdominal muscles are primarily involved in generating pressure gradient between the lungs and the atmosphere. Reason : The strength of inspiration and expiration can be increased by abdiminal muscles in diaphragm and intercostal muscles.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion
    B
    If both assertion and reason are true and reason is not the correct explanation of assertion
    C
    If assertion is true but reason is false.
    D
    If both assertion and reason are false.

  • The amount of air that enters lungs during normal respiration is :

    A
    tidal volume
    B
    vital capacity
    C
    total lung capacity
    D
    inspiratory capacity

  • A partial pressure gradient of oxygen exists between :

    A
    the atmosphere and the lungs
    B
    lungs and metabolically active tissues
    C
    air at sea level and air at high altitudes
    D
    all of the above

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    Movement of air into and out of the lungs is carried out by a creating____ between the lungs and atmosphere.

    Fill up the blanks in the following paragraph by selecting the correct option. The movement of air into and out of the lungs is carried out by creating a (i).____ between the lungs and the atmosphere. Inspiration can occur if intra-pulmonary pressure is (ii).____ Expiration takes place when the intra-pulmonary pressure is (iii).____ than the atmospheric pressure. Expiration takes place when the intra-inspiration is initiated by the (iv).____ of diaphragm which (v).____the volume of thoracic chamber in the antero-posterior axis.

    Asertiion : Inspirations occurs when there is a negative pressure in the lungs with respect to the atmospheric pressure. Reason : During inspiration, a decrease in pulmonary volume increases the intre-pulmonary pressure than atmospheric pressure which forces the air from outside to moe into the lungs.

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