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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.
Why roots of many swamp plants have a special morphology? The Swamp and The marsh plants in general present supporting roots that ramify from portions of the stem above the gro
Q. What is the virus that causes flu? Why doesn't the body produce permanent immunity against that virus? How does the vaccine against flu work? Flu is a disease caused through
Define role of Vitamin D in controlling gene expression? Vitamin D is a secosteroid that is metabolically activated and degraded through the actions of three cytochrome P450 hy
Q. Which are the three parts of the small intestine? The small intestine is divided into three portions: duodenum, ileum and jejunum. Q. By generally dividing food into car
Slow Moving Waters - Biota of Rivers The habitat of a slowly moving part of the river is very different from the one just described. Here the water flow is comparatively slow
Q. What is Catharanthus roseus pharmaceutical compounds? This species yielded the alkaloids vincristine and vinblastine. Traditionally used by various cultures for the treatmen
What is syphilis? Syphilis, also known as lues, is a disease caused by the bacteria Treponema pallidum. Before the discovery of penicillin, syphilis was a fatal disease. Today
classificationof algae
CONDUCTIO N OF IMPULSE - IN NON-MYELINATED AXONS - The impulse moves along the axon as local effect by altering the permeability of neighbouring Na + channels and af
DIFFERENCE S BETWEEN MYOSIN AND ACTIN FILAMENTS Myosin filaments (primary filaments) Actinfilament s (secondary filaments)
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