Regulatory mechanisms, Biology

Regulatory Mechanisms

The immediate response to acute temperature chance is mediated through the central nervous system. The physiological thermostat has been located in the hypothalamus of the mammal and the spinal cord of the bird. These are the centres of reflex action and are activated by the temperature receptors of the skin or mucous membranes or directly through the changes in the temperature of the hypothlamus (or the blood circulating through it).

The physiological thermostat through the efferent nerve fibres stimulate the muscles for panting and shivering and through the autonomic system it regulates the cutaneous blood vessels, the sweat glands and so on. In some of the amniotes, the pineal and parapineal organs influence thermoregulatory behaviour and physiology. Cardiovascular and cutaneous responses are acute reactions to temperature change. If the exposure is more prolonged, the endocrine system enters the picture and the metabolism is altered particularly by way of the thyroid and adrenal glands.

Posted Date: 1/16/2013 6:04:59 AM | Location : United States







Related Discussions:- Regulatory mechanisms, Assignment Help, Ask Question on Regulatory mechanisms, Get Answer, Expert's Help, Regulatory mechanisms Discussions

Write discussion on Regulatory mechanisms
Your posts are moderated
Related Questions

Q. Embryology in relation to taxonomy? Embryological information has been used for taxonomic purposes at various levels of classification. You know of a very basic division of

Lysosomes Lysosomes are small vesicles which are bounded by a single membrane & contain hydrolytic enzymes in the form of minute crystalline or semi crystalline granules of

R a d i o g r a p h y: Radiograph or X-ray remains the most well-known and primary diagnostic tool of all the imaging modalities. It works b

Name the reserve food materials in pheophyceae Ans) Reserve food materials in pheophyceae are laminarin and mannitol

What is Biochemical Composition As life evolved on this planet, nature selected only a few elements, and life eventually came to be based essentially on carbon compounds. Out o

Explain what is tooth formula? Ans) Formulae of tooth is (2, 1, 3, 2)

Explain about the Adequate Intake (AI)? If sufficient data are not available to establish an EAR and hence RDA, the AI is derived instead. The AI is derived from observations o

Q. Why is the nickname "dark reactions" not completely correct for the chemical stage of photosynthesis? "Dark reactions" is not a correct name for the chemical phase of photos

Brooke's  Formula: a)  Fluid  requirement  b)  Estimate the accurate/approximate weight of the patient  c)  First  24  hours  Colloids (blood, plasma, dextran) 0.5 ml