Biological Approach

Question 1

What are bases of biological approach

Answer 1

Everything in psychology has a biological basis
Our biology is determined by evolution and genetics
To look at mind we must investigate physical brain

Question 2

the genetic basis of behaviour A01

Answer 2

Section of dna used to make proteins or enzymes controls characteristics and can code for certain functions such As cans and spinal chord and production of neurotransmitters if problem occurs with genes it may affect neurotransmitters which may indirectly affect behaviour but directly affect our biology For example the 5htt gene increase the likelihood of developing ocd due to low levels of serotonin.

Question 3

The brain A01

Answer 3

Controls day to day behaviour and it’s responsible for the production of thoughts and emotion and sensations

Question 4

neurotransmitter A0 1

Answer 4

Nerve impulse reach end of neutrons neurotransmitter released and travel across synapse in vesicles triggering neutron to increase or decrease rate of electric impulse
Allow different parts of the brain to communicate problems with neurotransmitter may lead to low levels may lead to depression and high anxiety

Question 5

Evolution

Answer 5

Successive generation organism which adapt are more likely to survive and reproduce and have a greater chance of reproducing this adaptive characteristic may be due to genes when copies from parents when offsprings reproduce they transfer the genetic material random mutation may cause a change in genes ie agrssion in human

Question 6

Interaction between genes and genes

Answer 6

leads to differences in species each allele will either be dominant or recessive the dominant is always shown if passed on from either parent this will be expressed in the phenotype, recessive will only be expressed if the allele passed from both parents is recessive

Question 7

Interaction between genes and the enviorment

Answer 7

the role of gene and enviroment in psychological disorders is called diathesis stress model usually there is a gene which causes vulnerability to develop a psychological disorder (diathesis) and there is a triggering event from the event (stress) there need to be a combination of both

Question 8

concordance rate what is it

Answer 8

the staistic used to measure the chance that two twins share the same characteristics

Question 9

how does shared genes differ in different twins

Answer 9

in monozygotic twins they share 100% genes and in dizygotic they share 50% genes

Question 10

what does concordance rate tell us about the genetic influence

Answer 10

if the characteristics were purely down to genetics we would expect to see that the concordanc rate is 100% for mz twins and 50% for dz twins
if the concordance rate for mz twins was significantly greater than the concordance rate for dz we would expect that the characteristics are mainly due to genetics as proportion of shared genes increase so does likelihood of developing the same disease
if the mz concordance rate is very similair to the dz twins we can assume that it is due to enviromental factors