Metamorphic changes of dermis in skin of frog larvae exposed to thyroxine☆
[摘要] LarvaeofRanapipiensimmersedinastrongthyroxinesolutionatTaylor-KollrosstagesVI–VIIIsurvivedupto7–8days.Samplesofheadskinwerefixeddailyandpreparedforelectronmicroscopy.Protoplasmicprocessesfrommesenchymecellsprotrudeintothebasementlamellaincontrolanimalsnotexposedtothyroxineandinthoseexposedbut1day.Channelscontaininggroundsubstanceandfinefilamentsareorientedverticallyinthelamella.By2daysafterimmersioncellbodiesofmesenchymecellshavemovedintothebasementlamella.Mesenchymecellsarefoundclosertotheepidermisafter3–4days.Bydays5–7mesenchymecellshavemovedoutwardtoformthestratumspongiosumseparatingbasementlamellafromepidermis.
[发布日期] [发布机构]
[效力级别] [学科分类] 生物科学（综合）
[关键词] [时效性]
