Final answer:
Cricoid pressure is applied on the cricoid cartilage in the neck to prevent regurgitation and reduce gastric distention during rapid sequence intubation.
Step-by-step explanation:
To help prevent regurgitation and reduce gastric distention, cricoid pressure is applied on the cricoid cartilage. This procedure, also known as the Sellick maneuver, is used during rapid sequence intubation to prevent the backflow of gastric contents into the pharynx and lungs, which can cause aspiration pneumonia. The cricoid cartilage is a ring-like structure located in the neck, at the top of the trachea. Applying pressure here compresses the esophagus against the vertebrae. This obstruction prevents gastric contents from moving upwards, thus reducing the risk associated with regurgitation.