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Adrenocortical Steroids - Vertebrates
The adrenal cortex secretes two types of steroid hormones:
This distinction between glucocorticoids and mineralocorticoids is found in mammals where as nonmammalian vertebrates do not maintain such distinction. In general the action of corticosteroids is adaptive. Salt output or retention is altered in accordance with environmental demands.
In mammals aldosterone, a mineralocorticoid is concerned with electrolytd balance. It is produced in response to adrenoeorticotropic hormone (ACTH) secreted by the pituittary. ACTH itself is released in response to a corticotropin releasing factor (CRF) from the hypothalamus. Glomerulotrophic hormone from the pineal gland is also known to stimulate aldosterone secretion. In nonmammalian vertebrates apart from aldosterone, another mineralocorticoid, cortisol is known to promote NaCl absorption. The mineralocorticoids increase the tubular absorption of sodium and promote the renal excretion of potassium.
Avian adenovirus infections EDS-76, an adenovirus, has been etiologically associated with drop in egg production. Other adenoviruses affecting chicken and other birds include
i want about superclass pisces
What is a terrestrial organism? 'Terra' is the Latin word for earth. Thus, an animal that lives on the surface of the earth is known as terrestrial. This is the similar root wo
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Define Energy Requirement for Cancer Patients? It must be clear to you that cancer imposes increased energy demands because of the hyper-metabolic state of the disease process
Explain the Management of Eating Disorders? We shall consider the components of the management of anorexia nervosa and bulimia nervosa together, since the nutritional consequen
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Define Absorption, Storage and Elimination of ascorbic acid? Ascorbic acid is rapidly absorbed from the intestines primarily by active transport. Simple diffusion or carrier-m
State the term in brief -Asconoid sponge? Of the three different sponge architectures, it is the simplest. It comrpsies a central choanocyte lined spongocoel which opens to the
cassification of mode of nutrition
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