Estrus - estrous cycle, Biology

Estrus - Estrous cycle

This is the period of heat, and copulation is permitted only at this time. This condition lasts from 9 to 15 hours and is characterised by a high rate of running activity. Under the influence of EPH, a dozen or more ovarian follicles grow rapidly: estrus is thus a period of heightened estrogen secretion. Behavioural changes include quivering of the ears, and lordosis (arching the back in response to handling or to approaches by the male). The uteri undergo progressive enlargement and become distended owing to the accumulation of luminal fluid. Many mitosis occur in the vaginal epithelium and as new cells accumulate, the superficial layers become squamous and cornified.

The latter cells ah exfoliated into the vaginal lumen, and their presence in vaginal smears is indicative of estrus. During late estrus, there are cheesy masses of cornified cells with degenerate nuclei present in the vaginal lumen, but few if any leukocytes are found during estrus. Ovulation occurs during estrus and is preceded by histologic changes in the follicle suggestive of early luteinisation. Much of the luminal fluid in the uteri is lost before ovulation.

Posted Date: 1/16/2013 11:25:18 PM | Location : United States







Related Discussions:- Estrus - estrous cycle, Assignment Help, Ask Question on Estrus - estrous cycle, Get Answer, Expert's Help, Estrus - estrous cycle Discussions

Write discussion on Estrus - estrous cycle
Your posts are moderated
Related Questions
heating a food sample with Benedict''s solution is a test for...

T he effects of unlimited population growth are as follows: 1.         Increase in unemployment. 2.          Low per capita income. 3.         Low living standard

Why is the reaction of ethane and chlorine not a free-radical addition reaction? Because no free radicals are include in the reaction process only carbo cations and Cl- are evo

Define influence of polyphenols on Carbohydrates? Binding of proteins may indirectly affect carbohydrate absorption. Inhibition of amylolytic enzymes and subsequent reduction o

Person Z swallowed a large amount of substance X and, as a result, has convulsions (abnormal violent contractions of skeletal muscles).  Swallowing which of the following substance

Define Nutritional Needs during Exercise? During Exercise: Addressing the nutritional needs during training is essential for optimal performance. The focus should be to:

Q. What is the morphological characteristic that evolutionarily approximates the beings of the phylum Annelida to arthropods? The metameric feature that is the body segmentatio

EXAMPLES OF NATURAL SELECTION - 1 .       INDUSTRIAL MELANISM - First studied by Fischer & Ford (1845) on pepperd moth (Biston betularia) of two types : grey moth (B.


Define Functions of Protein? Each of the various proteins in the body serves a specific function in the maintenance of life. Any loss in body protein, in reality, means a loss