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 impaired hypothalamic function cause hypothermia despite normal shivering reflexes in a patient?
• A patient with advanced heart failure exhibits chronically elevated end-diastolic volume. What mechanism most directly diminishes cardiac output under these conditions?
• If a patient with a non-functional filaggrin gene (involved in keratinocyte aggregation) sustains a deep dermal abrasion, which consequence regarding healing is most likely?
• If a mutation disables the EGFR receptor's ability to internalize after growth factor binding in lung cancer cells, which consequence follows?
• A patient with thrombocytosis (excess platelets) experiences increased risk of vascular occlusion. Why does platelet aggregation cause this heightened occlusion risk?
• A woman experiences shortened luteal phase, with early menstruation occurring ten days after ovulation. Which mechanism explains this condition involving progesterone levels?