A researcher observes that neutrophils exposed to interferon-gamma (IFN-γ) exhibit enhanced phagocytosis of Staphylococcus aureus. Why does this occur in the immune response?

💡 Explanation

IFN-γ enhances the immune system by promoting antibody-dependent cell phagocytosis. It upregulates Fcγ receptors on neutrophils, enabling increased binding to antibody-coated bacteria, because these receptors mediate the recognition and uptake of opsonized pathogens by phagocytes; therefore, phagocytosis increases, rather than decreasing due to other factors.

• Why does visual acuity decrease when the lens in the eye loses elasticity during the progression of presbyopia?
• What distinguishes the eye's lens accommodation in a young adult focusing on a near object from that of an older adult struggling with presbyopia?
• What causes reduced self-tolerance when molecular mimicry activates T cells in autoimmune thyroiditis?
• If a diabetic patient experiences prolonged elevated blood glucose after a surgical wound, which consequence follows regarding collagen synthesis?
• Following partial hepatectomy, which outcome is most promoted by the liver's regenerative response?
• Why does rheumatoid arthritis flare up after certain infections?