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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.
Q. How does synaptic transmission between neurons take place? The propagation of the action potential along the axon reaches the region immediately anterior to the presynaptic
what is the classification of vertibrates
Body Fluids of Marine Teleost The body fluids of marine teleost are hypotonic to seawater, so these fishes lose water to the environment especially across the gill epithelium.
STRUCTURE Each chromosome composed of two interwoven (coiled) threads called Chromonema (Chromonemata) embeded in a matrix of semisolid protein. Surface of matrix is in
why does each muscle need an antagonistic partner
Metazoan Branches The Kingdom Animalia comprises all the multicellular animals (metazoans). These are divided into three branches: Mesozoa Parazoa Eumetazoa
Why does one need to study about soil and what is its importance? You would be aware that, from the dawn of agriculture, cultivators were attracted to fertile soils of river
Which invertebrate groups possess one, three, four or all of the features below? Segmented bodies, hard exoskeleton, jointed legs, compound eyes, three pairs of walkin
Explain the life cycle of Nitrogen ? Nitrogen cycle: Along with carbon, hydrogen, and oxygen, nitrogen is one of the most common elements that form biological molecules. Nitr
Q. What is Moderate level of Lactase activity? Intake of milk is restricted depending on the tolerance. Fermented and cooked form of milk should be preferred as it is better to
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