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DRUG DEPENDENCE -
Some drugs are prescribed by doctor for the prevention or treatment of a disease.
Some drugs are used for long periods.
A person becomes addict to these drugs. This is called drug dependence or drug addiction or drug habituation.
Drug dependence is of two types -
(i) Psychological
(ii) Physical
Psychological dependence is a false need.
Physical dependence is a neuro adaptation.
Vivipary - Development Biology In flowering plants the seed or fruit generally is dispersed and germination occurs when the conditions are congenial for growth. However, in so
General characters of phylum protozoa
Unlike the phagocytosis, that is a regulated form of endocytosis carried out by a small number of cell category, pinocytosis is a constitutive process which happens continuously in
- Nuclear membrane disorganize at the beginning of this phase. - Spindle fibers originate and the kinetochore fibers attach to the kinetochore of homologous chromosomes from eac
You are working with plants that have either hairy (dominant) or 'bald' (recessive) flowers. Hairy flowers have little hairs on them that make the flowers look fuzzy, bald flowers
Q. Effect of Destruction of Microbial Barriers? Physical damage to the integument allows microbial invasion of the underlying nutrient-rich tissues and it is a common observati
What is Nerve Impulses in human biology? A nerve impulse is an electrical signal carried by a nerve cell. Unlike electrical transmission in wires, this impulse is non-decremen
Blastula is the ball of cells surrounding a fluid-filled cavity (known as blastocoel) which is produced by the cleavage of a zygote.
What are the main human diseases caused by virus? Between diseases caused by virus are common cold, flu, mumps, variola (considered eradicated nowadays), rubella, AIDS, measles
Tumor Suppressor Genes Tumor suppressor genes or anti-oncogenes generally inhibit cell division in cooperation with proto-oncogenes. The very existence of these genes prevent
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