If a patient with asthma experiences a severe allergic reaction after accidental exposure to peanuts, which consequence is most likely regarding airway constriction?

💡 Explanation

Histamine released from mast cells during an allergic reaction causes bronchoconstriction and inflammation in asthma. Because the initial bronchospasm further stimulates mast cell degranulation and histamine release, a positive feedback loop exacerbates the constriction; therefore, bronchospasm increases histamine, rather than decreasing or having other effects.

• Why does the oxygen saturation in arterial blood sometimes fail to fully equilibrate with alveolar oxygen partial pressure during intense exercise, even when ventilation rate is high?
• Which endocrine imbalance results if human chorionic gonadotropin (hCG) declines rapidly during early pregnancy?
• During prolonged exertion in a desert environment, what distinguishes the body's core temperature increasing above its hypothalamic set point, causing heatstroke, from successful thermoregulation?
• Why does selective hearing loss typically affect higher frequencies first, following damage to the cochlea?
• If a topical antiseptic significantly disrupts the stratum corneum's lipid matrix in skin, which consequence follows?
• If a researcher selectively deactivated filaggrin production in human epidermal cells cultured in vitro, which consequence is most likely?