Practice question

Integument of amphibians contains abundant epidermal glandular derivatives: widespread alveolar mucous glands secreting mucopolysaccharides maintaining thin moist surface essential for cutaneous gas exchange and thermoregulation, plus larger granular poison glands called parotoid or granular glands producing alkaloids, peptides like bradykinin, bombesin, bufotoxins milky defensive secretions deterring predators and antimicrobial magainins. Epidermis poorly keratinized, lacking hair-associated sebaceous and sweat or oil glands typical of mammals and reptiles. Mucous and poison combination reflects adaptation to moist habitats and chemical defence strategy. This concept holds high importance for NEET, CBSE board, CUET and competitive examinations focusing on comparative