Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Endocrine Organs
Endocrine organs, as explained earlier are those organs or tissues, which release chemical substances directly into blood stream. Not like exocrine glands they do not have ducts to carry their secretion, and are hence considered ductless glands. Table lists the endocrine glands of the higher invertebrate groups, the secretions they generate and the functions of the secretions. Among non-chordates neurosecretory cells (NSCs) form a significant constituent of the endocrine system.
Table: Endocrine Organs
These are nerve cells specialised for hormone production. Thus they combine neural and endocrine properties. Apart from this, endocrine glands may arise from the nervous system, by complete modification. Corpus cardiacum of insects is one such gland. Several non-chordates have also epithelial endocrine glands derived from embryonic ectoderm, mesoderm or endoderm layers. The optic glands of cephalopod molluscs, androgenic glands and Y-organs of crustaceans, and the corpus allatum and prothoracic glands of insects are some instances. You will be studying these structures and their functions in detail. But previous to we proceed further, let us look into the concept of neurosecretion a little more elaborately, since neurosecretion plays a significant role in regulating metabolic and reproductive functions in non- chordates.
The left atrio-ventricular aperture in man is guarded by
Fusion of Sperm and the Egg After the penetration of the extracellular layers by sperm there occurs the fusion of the - sperm plasma membrane with that of the egg. In mammals
Mycotoxicoses Mycotoxicoses cause heavy economic loss due to high morbidity and consequent production loss. Low grade mortality is also recorded. The main toxins involved are
Techniques : Depending on the type of surgery planned, the heart may be approached through median sternotomy, left or right thoracotomy. The problems encountered could be due to
Define about the Carbohydrates? In the previous unit we have studied about the energy requirements. You now know that energy must be supplied regularly to individuals through t
Ethylene - Plant Hormones Amongst hormones in both plant and animal kingdoms, ethylene, a gaseous hydrocarbon, is unique. Despite its chemical simplicity, it is a potent growt
Problem 1: How do you differentiate between a dossier and a submission document? Define dossier Define submission document differentiate between a dossier and a
Biological Conduits : Freeze dried arterial, bovine MA, human umbilical vein, cryo preserved umbilical vein or artery and omniflow sheep collagen tube grafts also have poor
In the scientific competition against fixism what are the main arguments that favor evolutionism? The major arguments in favor of evolutionism are paleontological, from the stu
Q. Explain about Individual consciousness? The physical brain is not a source of experience as some current neuroscientists now mistakenly believe. While areas of the brain are
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd