Adrenocortical steroids - vertebrates, Biology

Assignment Help:

Adrenocortical Steroids - Vertebrates

The adrenal cortex secretes two types of steroid hormones:

  1. Glucocorticoids, concerned with regulation of glucose and
  2.   Mineralocorticoids, concerned with salt regulation.

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.


Related Discussions:- Adrenocortical steroids - vertebrates

Explain fluconazole, Fluconazole Fluconazole is active against most  Ca...

Fluconazole Fluconazole is active against most  Candida species other than C. krusei, which is intrinsically resistant, and many strains of C. glabrata, which are increasingly

Procedures for diagnosis - immune responses and biomarkers, Demonstration o...

Demonstration of immune responses and biomarkers: This may be done either on the basis of sero-conversion study on paired sera samples or by challenge (protection) test.

Define the meaning of goitrogens, Define the Meaning of Goitrogens? Goi...

Define the Meaning of Goitrogens? Goitrogens are substances that interfere with iodide metabolism in any way that inhibits thyroid hormone synthesis. As a result, there is augm

Describe the process of crassulacean acid metabolism, Describe the process ...

Describe the process of Crassulacean acid metabolism. a) How is it advantageous to plants? b) Describe the major steps in Krebs cycle. Why is this cycle also called citric a

Three irreversible reactions in the glycolytic pathway, Name the three irr...

Name the three irreversible reactions  in the glycolytic pathway. The three irreversible reactions in the glycolytic  pathway are : Glucose → Glucose-6-phosphate Fructose

Micro organisums, advantages and disadvantages of protozoa

advantages and disadvantages of protozoa

Macro taxonomy, what are the character selection criteria?

what are the character selection criteria?

Population, Population You must be familiar with the term 'population'. I...

Population You must be familiar with the term 'population'. It is one of the most talked about issues of this century. It is feared that the rapid growth of the world population

Explain the procedure estimation of the amount of bacteria, Explain the Pro...

Explain the Procedure Estimation of the Amount of Bacteria? Now carry out the exercise following the steps enumerated herewith. 1. Prepare ten fold dilutions of E. coli cult

Systmetic, Relation between taxonomy and ecology

Relation between taxonomy and ecology

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd