Through which of the following pas of nasal cavity does the main current of airflow occur during inspiration?: (A) Through olfactory area, (B) Superior pa of the cavity in the superior meatus, (C) Middle pa of the cavity in middle meatus in a parabolic curve, (D) Lower pa of the cavity in the inferior meatus in a parabolic curve
Answer is C. Airflow through the nose is a result of pressure difference created by a negative pressure gradient generated by the expanding intrathoracic volume during inspiration. Majority of air flows through the middle meatus of the nasal cavity and takes a parabolic curve, as the airflow curves inferiorly as it passes through the choanae into the nasopharynx.