During inhalation, the pressure in the thoracic cavity: (2022)
Practice Questions
Q1
During inhalation, the pressure in the thoracic cavity: (2022)
Increases
Decreases
Remains constant
Fluctuates
Questions & Step-by-Step Solutions
During inhalation, the pressure in the thoracic cavity: (2022)
Step 1: The diaphragm, a muscle under your lungs, moves downwards.
Step 2: When the diaphragm moves down, it makes more space in the thoracic cavity (the area where your lungs are).
Step 3: As the space increases, the pressure inside the thoracic cavity decreases.
Step 4: Because the pressure is lower inside the thoracic cavity than outside, air from outside flows into the lungs.
Inhalation Mechanics – Inhalation involves the contraction of the diaphragm, which increases thoracic cavity volume and decreases pressure, facilitating air intake.
Pressure-Volume Relationship – According to Boyle's Law, an increase in volume leads to a decrease in pressure, which is crucial for understanding respiratory mechanics.
