Vapour Pressure Changes in the Frog's Egg at Fertilization
نویسندگان
چکیده
منابع مشابه
Vapour Pressure Changes in the Frog ' S Egg at Fertilization
INTRODUCTION The suggestion has been made that the response of an egg to the action of a spermatozoon or parthenogenetic agent may be similar to that of a nerve to stimulation (Lillie, 1909). If this were so, it might be expected that activation, whether by a parthenogenetic agent or by a spermatozoon, would cause an increase in the permeability of the egg surface; although this increase in per...
متن کاملCell surface changes in the egg at fertilization.
An egg changes dramatically at fertilization. These changes include its developmental potential, its physiology, its gene expression profile, and its cell surface. This review highlights the changes in the cell surface of the egg that occur in response to sperm. These changes include modifications to the extracellular matrix, to the plasma membrane, and to the secretory vesicles whose contents ...
متن کاملChanges in actin distribution during fertilization of the mouse egg.
Unfertilized mouse oocytes and eggs 1-8 h after fertilization in vitro were examined at the light microscope level for structural changes, distribution of actin (as assessed by both antiactin antibodies and NBD-phallicidin), surface binding of concanavalin A (Con A) and chromosomal distribution and condensation. The influence of cytochalasin D on these events was also assessed. Changes in actin...
متن کاملIntracellular calcium release at fertilization in the sea urchin egg.
Fertilization or ionophore activation of Lytechinus pictus eggs can be monitored after injection with the Ca-sensitive photoprotein aequorin to estimate calcium release during activation. We estimate the peak calcium transient to reach concentrations of 2.5-4.5 & free calcium 45-60 set after activation and to last 2-3 min, assuming equal Ca2+ release throughout the cytoplasm. Calcium is release...
متن کاملRenovation of the egg extracellular matrix at fertilization.
Extracellular matrices are essential for cell survival and function. This is especially relevant for eggs, which establish a physical barrier at fertilization to protect a new embryo from additional sperm and pathogens. Formation of an extracellular matrix is most dramatic in sea urchins, in which fertilization was first observed in animals with the "sudden appearance of a perfectly transparent...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Experimental Biology
سال: 1948
ISSN: 1477-9145,0022-0949
DOI: 10.1242/jeb.25.3.227