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

Limitations in the diagnostic use of stress echocardiography, Q. Limitation...

Q. Limitations in the Diagnostic use of Stress Echocardiography? Although the presence of coronary artery disease is readily recognised in the setting of multivessel disease, a

State the benefit of the new brain imaging technology, Benefit of the new b...

Benefit of the new brain imaging technology Benefit from the new brain imaging technology, notably the CT scan, and the application of high speed computer technologies, permitt

X and y chromosomes determine only sex characteristics, Do the genes of the...

Do the genes of the X and Y chromosomes determine only sex characteristics? Moreover sex genes the sex chromosomes have also autosomal genes, genes that codify several proteins

Define inadequate calcium intake and iron deficiency anaemia, Determine Eff...

Determine Effect of Inadequate calcium intake and iron deficiency anaemia? The requirement of iron and calcium is at its peak in adolescence due to an increase in the skeletal

What is Implant Failure, What is Implant Failure Implant Failure : Th...

What is Implant Failure Implant Failure : The total failure of implant to fulfil its purpose which are49 Surgical Complications, Long Term Implant Failures and Ma

Pathology of aortic regurgitation, Q. Pathology of aortic regurgitation? ...

Q. Pathology of aortic regurgitation? In Post Inflammatory situations scarring and retraction of valve cusps lead to aortic regurgitation. Varying degrees of commissural fusion

Microfilament, Full Description about microfilament

Full Description about microfilament

How are gases exchanged in sponges, Q. How are gases exchanged in sponges? ...

Q. How are gases exchanged in sponges? The gas exchange in sponges happens by diffusion from the exterior to the cells that absorb molecular oxygen and liberate carbon dioxide.

What is specific gravity - properties of solutions, Specific Gravity Th...

Specific Gravity The density of a substance is defined as  mass per unit volume.  The density of a substance is a characteristic property and has a definite value at a given te

Microorganisms on on basis of nutrient degradation capacity, Q. Microorgani...

Q. Microorganisms on On basis of nutrient degradation capacity? On basis of nutrient degradation capacity: - Proteolytic: Microorganisms, which are capable of protein degra

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