Apical ectodermal ridge or aer, Biology

Apical Ectodermal Ridge (AER)

We have described earlier that the AER persists at the tip until the last phalangeal cartilage begins differentiation. The following experiments have demonstrated that the AER is formed and then maintained under the influence of limb mesoderm:

1) When limb mesoderm is grafted under the ectoderm of any region of an early embryo it induces the formation of an AER in the overlying ectoderm.

2) When limb bud mesoderm is removed or separated from the AER by a barrier (e.g. a thin sheet of mica) or is replaced by non-limb mesoderm the AER flattens and disappears. It is believed that limb mesoderm secretes some substance called AER Maintenance Factor (AER MF) that sustains the integrity of the AER.

 

Posted Date: 1/29/2013 6:06:42 AM | Location : United States







Related Discussions:- Apical ectodermal ridge or aer, Assignment Help, Ask Question on Apical ectodermal ridge or aer, Get Answer, Expert's Help, Apical ectodermal ridge or aer Discussions

Write discussion on Apical ectodermal ridge or aer
Your posts are moderated
Related Questions
A question is flashed on a screen in the left visual world of right-handed person Z. Person Z is a healthy individual with an normal nervous system.  Person Z has a patch over Z's


What is Schistosomiasis? Explain in brief. A disease cause by the trematode parasite Schistosoma found around the world. Numerous species are responsible for diseases ranging f

AYou are a sergeant in a community relations unit in a mid-sized metropolitan police department. Your division commander sent you off to a 1-week ethics school run by the Justice D

What are alleles of a gene? Diploid individuals have paired chromosomes. For instance in humans there are 23 pairs of chromosomes totalling 46 chromosomes. Each pair comprehend

Describe about Acyanotic Congenital Heart Disease ? The following lesions will be discussed here: Left to right shunts: Atrial Septal Defect (ASD), Ventricular Septal Defect

Nutritional and functional role of minerals in foods Essential elements including the main elements and a number of trace elements fulfill various functions: as electrolytes, a

Explain Increased Fibrinogen Levels and Other Thrombogenic Factors ? Thsombogenesis is an important component in the pathological process of atherosclerosis and so it is not s

Glands A cell, tissue or organ which secretes specific chemical secretion is known as a gland. The glands develop from the epithelium tissues. The glands are classifi

CHF complicating IE is primarily the result of valve destruction or distortion or rupture of chordae tendinae. Intracardiac fistulas, myocarditis, or coronary artery embolization m