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Regulation of Testicular
Activity The production of spermatozoa is under the influence of pituitary hormones and of androgens derived from the testis. The testicular tissue involute in the experimental animals deprived of pituitary hormones. FSH is required for the differentiation of spermatogonium into spermatozoa and LH (also known as interstitial cells stimulating hormone (ICSH) in males) to stimulate the Leydig cells for the production of androgens.
The increased levels of androgens in the blood suppress the synthesis and secretion of gonadotropins in the pituitary.You have studied earlier that the time required for the spermatogonia to differentiate into spermatozoa is a biologic constant, varying with the species and strain, which cannot be altered by hormones and other factors. On the other hand, the number of spermatozoa produced is dependent upon pituitary gonadotropins, androgens, nutritional factors. Temperature, light etc.
Explain the True indications of Endodontic Surgery 1. Failure of non-surgical endo. Re-treatment "persistent lesion" 2. Failure of initial and retreatment will not achieve b
DE A T H - It is terminal end of the degeneration changes of old age. Death occurs when vescular system & respiratory system stop working. Failure of nervous system ma
The various organs involved in the digestion process are: Alimentary tract which includes mouth, pharynx, esophagus stomach, small intestine, large intestine, appendix, rec
Different Feeding Habits Feeding habits of animals depend on the nature of the food consumed. Herbivorous : When plants are eaten. Examples - Horse, cow, rabbit, apes.
Pelagic Zone - Organisation of the Marine Ecosystem The waters contained in the sea basin, constitute the pelagic zone which is divided into The neritic zone situ
The initial evaluation of new onset heart failure should include an electrocardiogram, chest radiograph, and B-type natriuretic peptide assay. The cardiac rhythm may be normal sinu
introduction of safety measures of drug administration
why is epidermis peeledsuggest why a marine amoeba does not have a contractile vacuole
Describe the important factors of Hand washing Hand washing is an important practice to follow before doing any procedure for the patient. The infection can be transferred
Which of the following is not a type of mass movement that results from the force of gravity? A. Landslide B. Creep C. Deflation D. Mudflow
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