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drug dependence -some drugs are prescribed by doctor for the prevention or treatment of a diseasesome drugs are used for long periodsa person becomes
psychological disorders -1 anxiety disorders2 obsessive compulsive disorders3
types of mental disorder -1 psychosis2 neurosis3 personality amp character
mental healthfor physiological health amp social status it is necessary to maintain mental healthmental illness is characterised by
census -counting by government of each decade is called censuspopulation of world -in 2000 - 61 billionin children birth per day - 336960population
consequence of over population -with increase in population the available natural resources will fall short of requirementsa severe competition will
reasons for growth of population -the human population explosion is mainly a result of reduced death ratemain reasons for it are
malthus theory of human population growth -malthus put forward in 17781 population grows in geometrical ratio where as the
demographic cycle -1 first stage -bhigh - dhigh 02 second stage -bhigh -
natural control of population growth -1 biotic potential -it is capacity of population to increase its number by
characteristics of population -each population envolves adaptations suited to its own localitypopulation is unit of evolutionpopulation is also an
demography -scientific study of vital amp social statistics such as births deaths disease etc of human population is called demographyit deals with
population was defined by clarke in 1954the term population refers to the total number of individuals of a sp occupying a particular geographic aera
skin grafting -skin for grafting is taken from another part of body of the same personsnow it is possible to grow a sheet of skin in culture from a
bone marrow transplant -it is transplanted to treat leukemiahere graft itself causes immune rejectionbefore transplant the recipients bone marrow
organ transplant rejection -major histocompatibility complex is responsible for stimulating the rejection of tissue mhc is set of genes that code for
transplantation -it is implanting of a living or preserved tissue or organ from one site to another side in the same individual or from one
phobias -common phobias for -spiderslizardssnakescockroachcrowded placesvast open placesclosed small
psychosocial problems -1 accidental injury -automobile accidents are no 1 killers of adolescents as they drive often
adolescence -it is the period of growth from the onset of puberty to the completion of growth amp maturity it extends between 12- 20 yrsit is a
chorionic villus sampling cvs -cvs is done during 8th-10th week of pregnancy when abortion is safefor cvs cells are sucked into a catheter passed
amniocentosis -transabdominal aspiration of fluid from the amniotic sac of the foetus is called amniocentesis it is prenatal diagonestic technique to
test tube baby -ova are fertilized in laboratory dish in vitra containing a nutrient brothit may be artificial insemination donor aid artificial
permanent method -1 vasectomy in male2 tubectomy in female3 leproscopy is used in tubal ligation to ligate fallopian