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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.
Indications i) When there is an abnormal rise in the bilirubin level which may be due to physiological or pathological jaundice or any other problem. ii) Prophylactic ph
Results : In the present day, surgical mortality with or without CABG is repture to be 5-7 per cent. The late survival is 85 per cent, 75 per cent and 65 per cent at 1, 3 and 5
State in brief about Gullstrands Theory A change in the lens is controlled by the balance between elasticity of the lens capsule and the pull of zonules. It is believed that on
Describe the structure of pectin Its structure is presented in the figures (a) and (b). Pectin is a polygalacturonic acid ester along with rhamnose, arabinose and galactose.
This method is used for the desalination of water i.e., for the removal of dissolved mineral salts, acids, alkalis and also the radioactive substances from the effluents. Electro d
What is the meaning of Chelicifore? These feeding mouthparts are found on most, pycnogonads. Though the proboscis is the main feeding structure in these animals when chelicifor
Various acute complications of diabetes mellitus are described in this unit. Acute complications develop within a short period of time. These are due to improper treatment of diabe
Cholesterol can be gained either from the diet or it can be synthesized de novo, mainly in the liver. Cholesterol is transported round the body in lipoprotein particles. The rate
Phototherapy As you know exposure of the jaundiced infant to blue, white or green light is effective in reducing the serum billirubin level. When bilirubin absorbs light, ser
Define Clinical progress for treatment for pem? Normally, clinical improvement is evident within a week with the disappearance of oedema, The appetite improves almost dramatica
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