1. Yellow follicle numbers when the first egg was laid were 6.3, 9.0 and 12.4 for ad libitum reared Leghorns, sexlinked Dwarf (AL Dwarf) and Normal broiler breeders respectively. Multiple ovulation resulted in low egg production and a high proportion of defective egg shells in AL Dwarf and ...
The electron micrographs of oogonia reveal a large... E. W. Anderson,HW Beams - 《Journal of Ultrastructure Research》 被引量: 231发表: 1960年 The fine structure of the ovarian follicle of the ovoviviparous poeciliid fish, Lebistes reticulatus. I. Maturation of follicular epithelium J Morphol...
Follicle-stimulating hormone (FSH) is central to reproduction in mammals. It acts through a G-protein-coupled receptor on the surface of target cells to stimulate testicular and ovarian functions. We present here the 2.9-Å-resolution structure of a partially deglycosylated complex of human FSH ...
Follicle-stimulating hormone (FSH) is central to reproduction in mammals. It acts through a G-protein-coupled receptor on the surface of target cells to stimulate testicular and ovarian functions. We present here the 2.9-Å-resolution structure of a partially deglycosylated complex of human FSH ...
Ovarian follicular and are controlled by the interaction of () and gonadotropins. The objective was to determine the temporal and spatial relationships for gonadotropin receptor, steroidogenic enzyme, and system during the development of preovulatory porcine follicles. Sows (n = 18) were weaned and ...
The space between these membranes is known as perivitelline space. Final outer layer of the membrane is known as the corona radiata, and it is made up of layers of epithelial cells as the ovum exit the ovarian follicle. Ovum Structure...
Neither nurse cells nor follicle cells are present around all the oocytes. Oogonia are not found in the adult ovary, indicating the lack of a continued supply of oocytes. The ovarian lumen is connected with the lumens of the lateral and common oviducts, and then with the genital pore. Modes...
Structure of Hair Follicle The portion of a hair above the skin is called the shaft, and all that beneath the surface is the root. The root penetrates deeply into the dermis or hypodermis and ends with a dilation called the hair bulb. The only living cells of a hair are in and near ...
Despite intensive investigation over the past century, much remains mysterious about the structural changes in the ovarian follicle that result in ovulation in response to luteinizing hormone. Both the theca and mural granulosa layers of the follicle thin, and clearly this is essential for the follicl...
1)The original polarity of the sea-urchin egg is dueα)to the elongation of the growing oocyte at right angles to the wall of the ovarian follicle,β)to the position of the nucleus near the free end,γ)to the formation of the micropyle at the free end,δ)to the breaking down of the...