Adrenocortical steroids - vertebrates, Biology

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.

Posted Date: 1/16/2013 3:01:11 AM | Location : United States







Related Discussions:- Adrenocortical steroids - vertebrates, Assignment Help, Ask Question on Adrenocortical steroids - vertebrates, Get Answer, Expert's Help, Adrenocortical steroids - vertebrates Discussions

Write discussion on Adrenocortical steroids - vertebrates
Your posts are moderated
Related Questions
What is Flap tearing Poor preoperative surgical planning can result in flap of small size with inadequate exposure of the underlying bone. In an effort to increase the visibili

Structure of the Conduction System of the Heart Sinoatrial (SA) Node is the pacemaker node located in the right atrium near the opening of superior venacava. It is called

Explain the Fistulative surgery - Endodontic Surgery = (Incision and drainage) 1 Cortical trephination 2 Decompression 3

Biotolerant materials, are characterized by a thin fibrous tissue interface. The fibrous tissue layer develops as a result of the chemical products from leaching processes, leading

Explain the Procedure for Preparation of General Purpose Media Procedure: Now prepare the media following the steps enumerated herewith: 1. Weigh and dissolve each ingredien

XYY humans are fertile males. XXX humans are fertile females. What do these observations reveal about the mechanisms of sex determination and dosage compensation?

Name the proteins used in oteoblast Some of these proteins include fibronectin, thrombospondin, osteopontin and osteoadherin (most of them have RGD cell binding peptide for bin

Sickling occurs in deoxyhemoglobin, but not in oxyhemoglobin. Normal deoxyhemoglobin (HbA and HbS) molecules have a small hydrophobic "pocket" on the surface of a ? chain. In oxyhe

Which one of the following does not follow the central dogma of molecular biology? 1. Pea 2. Mucor 3. Chlamydomonas 4. HIV HIV is the central dogma of molecular bi

What is heterophagic intracellular digestion? How is this process accomplished? Heterophagic intracellular digestion is the breaking into minor substances of external substance