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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.
Modified or Semi-synthetic Gums These are natural polymers, which are chemically modified to give a new product with improved functional properties. These also fall into severa
Explain Acute Infections Fever Acute Infections Fever: Acute fevers are of short duration with acute symptoms, the body temperature may rise to above 104°F. Examples of such i
Why is it significant that exact copies of DNA are produced during replication? Producing exact copies make sure that when a cell divides, the offspring cells will receive the
Q. List principles to keep in mind for designing the messages? o Develop a positive theme. Approaches are more effective when they promote positive messages that state clear
Define Preoperative Nutritional Care during Surgery? It can be provided only to prospective candidates of elective surgery and is not feasible for emergency cases. Preoperative
Illustrating how neuropsychologists evaluate young preschool children, older children, youngster adults, and elderly adults. The brain is an evolving organ and functions very
The process of fatty acid elongation is similar to fatty acid synthesis as it also requires both: -malonyl CoA and NADPH -malonyl CoA and NADH -Acetyl CoA and NADH
Define Reagents Estimation of Iron in the Solution? 1. Conc. sulphuric acid (iron free) 2. Conc. potassium permanganate solution 3. Saturated potassium persulphate (K 2 S
how to test for water in a leaf?
Explain Rickets Rickets:- A condition in children due to vitamin D deficiency.
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