No abstract

Prolonged fasting caused a rise in blood glucose which reached a maximum above the prefast level on the 6th day. Concurrently the liver glycogen, rapidly depleted at the start of the fast, was partially replaced. Blood NPN increased continuously. Thus, gluconeogenesis appeared likely not only to be responsible for the blood glucose increase but also to play a role in the restoration of liver glycogen after initial glycogenolysis due to fasting. Fasting for 48 hours increased cardiac glycogen up to three times the prefasting level; a rapid decrease in this moiety occurred with further abstinence. Glucagon and growth hormone increased the cardiac glycogen of nonfasted birds; but had little, if any, influence on the effects of fasting. The daily injection of 60–70 u of either regular or HGF-free insulin per kilogram body weight resulted in an hyperglycemic rebound 24 hours after each injection. This rebound could be blocked completely by feeding Dibenzyline.

No abstract

A glandular region is described in the uterovaginal junction of the domestic fowl; the glands are residence sites for spermatozoa, which invade them rapidly and in large numbers after copulation or artificial insemination. Accumulations of spermatozoa are found in these glands, though in decreasing numbers, for as long as fertilized eggs are produced. The accumulations are similar in appearance to those previously described in infundibular glands, but spermatozoa can be made to penetrate the latter in considerable numbers only with special and unusual techniques. Consequently, it is suggested that the uterovaginal glands, not the infundibular glands, are the normal residence sites for those spermatozoa that are responsible for the continued fertilization of eggs after artificial insemination or when the hen is separated from the male.