Why does a prolonged state of malnutrition hinder skin's ability to resist bacterial infection despite adequate sebum production?

💡 Explanation

Malnutrition reduces amino acid availability, which impairs collagen synthesis, a key component of skin barrier function. The impaired integrity allows bacterial penetration, because the structural barrier is weakened. Therefore, the skin is more susceptible to infection rather than histamine, lymphatic, or cortisol-mediated immune responses.

• What distinguishes the action of peptide hormones from steroid hormones in endocrine signaling?
• Why does cellular senescence increase in aging muscle tissue, contributing to sarcopenia?
• Why does chronically sun-exposed skin wrinkle and sag more readily than skin protected from the sun?
• A weightlifter attempting a maximal lift experiences muscle fatigue and complete lift failure. Which mechanism most directly explains why the muscle fails to maintain force during the lift?
• If an adjuvant is omitted from a vaccine administered to a patient, which consequence follows regarding B-cell response?
• Why does intense, prolonged exposure to jet engine noise potentially lead to permanent hearing loss?