Summary
The effect of salts on the pars distalis of R. cyanophlyctis was studied by placing them in sodium chloride, potassium chloride (0.5%), distilled
water and tapwater (control) for 15 days. In frogs kept in NaCl solution basophil
type 3 cells (B3) showed marked hypertrophy and degranulation, whereas the B3 cells
of frogs kept in KCI solution showed the hypertrophy and accumulation of secretory
granules inside their cytoplasm. The B3 cells of frogs kept in distilled water or
tapwater showed no changes. The other cell types of the pars distalis (A1 and A2 acidophils;
B1 and B2 basophils) remained unaffected. It is concluded that the B3 cells are the
probable source of adrenocorticotrophin and that the adenohypophyseal hormone(s) play
a role in the maintenance of water and salt balance in R. cyanophlyctis.
Key-Words:
Pituitary
-
Rana cyanophlyctis
-
Basophils
-
Salts
