Secretion of hormones, Biology

Secretion of Hormones

The secretion of most hormones (except steroid) is by the process of exocytosis. Figure summarises the formation, transport, release and reconstitution of secretory vesicles. The release of hormones from the endocrine glands is controlled by nervous, hormonal or metabolic stimuli which also control the rate of release into the bloodstream. As with neurotransmitters, ca2+ seems to play an important role in the release of hormones. The secretion is not random but follows a certain pattern. This may be circadian (i.e. approximately a 24 hour cycle) or seasonal or may be periodical (e.g. the human menstrual cycle). Some hormones like the thyroxine or triiodothyronine are secreted continuously, by the thyroid gland).

Posted Date: 1/17/2013 1:09:50 AM | Location : United States







Related Discussions:- Secretion of hormones, Assignment Help, Ask Question on Secretion of hormones, Get Answer, Expert's Help, Secretion of hormones Discussions

Write discussion on Secretion of hormones
Your posts are moderated
Related Questions
Explain Some Ethological Activities Comparative studies of behaviour or activities are also used in systematic for identification of organisms. The comparative study of the beh

A fire hazards is any situation when there is a greater risk of harm to the people or the property due to fire. Causes 1.      Overloaded electricity systems. 2.      St

Q. What are the main prophylactic measures against schistosomiasis? The major measures to prevent schistosomiasis are information for infected individuals to look for treatment

two types of amoebas waste and how they get rid of them

What are the grasslands of North America and of South America respectively called? The steppe grasslands of North America are known as prairies. The grasslands of South America

NON-EDIBLE AND OTHER MINOR OILSEED CAKES Besides the annually cultivated oilseed crops namely, groundnut, sesame, mustard, linseed, coconut, cotton, sunflower and safflower, I

Define the Marasmic Kwashiorkor? In countries where the incidence of protein-calorie malnutrition (PCM) is high, a large number of cases show signs and symptoms of marasmus and

Explain the term - Muscle Contraction Headache This is one of the most common headaches. It is also known as tension or nervous headaches. They result from sustained contractio

Proteins of Plant Origin Vegetable Proteins: Fresh vegetables are not considered to be a very good source of proteins. On fresh weight basis, the average protein content of s

a) How would you destarch the leaves of a potted plant? b) How would you check that the destarching had been effective?   a) If a potted plant is kept in darkness for