Shorts

Respiratory alkalosis is most commonly caused by hyperventilation, which can occur due to anxiety, pain, fever, hypoxia, and certain neurological conditions.

Bell's palsy typically involves the entire side of the face, not just the lower part. The affected side may become asymmetric and motionless, with wrinkles disappearing from the forehead and an inability to close the eye completely. Impaired articulation of labial sounds is a common symptom due to the involvement of the facial muscles used for speech.

tPA is a thrombolytic agent used to dissolve blood clots. In the treatment of pulmonary embolism, it is administered to break down the clot in the pulmonary artery, thereby improving blood flow and reducing the risk of complications.

Folic acid deficiency is most commonly due to inadequate dietary intake or increased metabolic demand, such as during pregnancy.

Rheumatic heart disease is most commonly associated with damage to the mitral valve, which is situated between the left atrium and left ventricle of the heart.

The initial event in a vasovagal syncope episode is an increase in catecholamine release, leading to a decrease in peripheral vascular resistance and tachycardia.

• Dilantin (phenytoin) therapy is associated with gingival hyperplasia (overgrowth of gum tissue), which is primarily fibrotic and not inflammatory.
• The other options (pregnancy, vitamin C deficiency, and puberty) are associated with primary inflammation, such as gingivitis or inflammatory responses in tissues.