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PINEAL GLAND (EPIPHYSIS CEREBRI) -
Hormone - Melatonin concentration in the blood appears to flow a diurnal (day-night) cycle as it arises, in the evening and through the night and drops to a low around noon. Because of this light mediated response, the pineal gland may act as a kind of "biological clock" which may produce circadian rhythms (variations following a 24 hour cycle).
Girls blind from birth attain puberty earlier than normal, apparently because there is no inhibitory effect of melatonin on ovarian function.
Explain the Ecological Approach in Taxonomy You already known that the use of ecological data in classification has been used since the time of Plato who considered aquatic, te
what are the two main subdivisions of the phylum chordata
Ventilation of Tracheal System - Diffusion Gaseous exchange due to diffusion generally takes care of the oxygen needs of most small insects. Similarly fairly large but inactiv
High salt concentrations can be toxic to plants as they have the potential to disrupt essential cell functions. Yet many halophytes sequester high amount of salt in their vacuoles,
A drug has a molec. weight of 200. How many grams would you use to make 100 ml of a solution that is isotonic (for man)? Assume that the diluent is distilled water and that the dru
how does it work
Amylase The presence of pancreatic amylase brings about the breakdown of starch and glycogen and its action is similar to salivary amylase. The hydrolysis of starch and gl
Define the effect of SCFA on Sodium Absorption? SCFAs (short chain fatty acids) have a stimulatory effect on sodium absorption from colonic lumen. The unionized SCFA crosses th
Explain Spread Plate Method - Pure Culture Techniques? In this method, diluted microbial suspension containing about 30 to 300 colonies is spread uniformly on the agar surface
Q What are some examples of tissues and organs where mitosis is more frequent, less frequent or practically absent? Generally in vertebrates mitosis is more frequent in tissues
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