A2 - Psychological approaches to health Flashcards
How can illness be inherited?
- disorders and diseases
What is an example of an inheritable disease/ disorder?
- schizophrenia
- environment = schizophrenogenic mother figure
Define polygenic.
- combination of genes working together
How do diseases develop?
- come from a combination of your genes, you choices and your environment
What do people inherit in their genes relating to illness?
-people inherit a predisposition making them more or less likely to become ill
What does illness depend on?
- factors that act as a trigger such as smoking or being exposed to a virus
What is an example of a genetic predisposition?
- physical illness obesity is a physical disease influenced by this
- twin studies show that BMI is greater in identical twin pairs than non-identical twin pairs indicating a strong genetic influence on genes
- mental disorders researched with twins and other family members suggested that depression is 37% inherited
What is phenylketonuria (PNU)?
- rare inherited disorder that causes an amino acid called phenylalanine to build up in the body
- they build up in the blood and brain leading to brain damage
- 5 days old given newborn blood spot screening to diagnose
- symptoms = temper tantrums, fairer skins, eczema and sickness
- treated by changing diet to avoid high protein foods and regular blood tests to measure phenylalaine levels
Define neurotransmitters.
- chemicals that allow communication between neurons, levels can become unbalanced with various effects on behaviour depending on whether the levels are too low or too high
What is the effect of physical health and serotonin?
- increased levels in areas of the brain by short, intense exercise and long-term moderate exercise
- improving sleep quality, alertness and digestion
What is the effect of mental health and neurotransmitters?
- high levels of dopamine associated with feelings of happiness and optimism
- depression linked to low levels of serotonin
- cause can be genetic
- some people inherit a gene which causes lower amounts of serotonin than others
Evaluate the biological approach to health through support.
- support for genetic predisposition
- PKU = genetic disorder cause by a mutation in a single gene
- resilience research = kim-cohen & Gold (2009) suggests that some people inherit genes that make them more resilient, but also have supportive relationships with others
- so resilience has a genetic basis but it depends on environmental circumstances
Evaluate the biological approach and health through practical application.
- knowledge of neurotransmitter imbalances has lead to practical ways of improving health
- recommendation for treating mild depression is serotonin levels and improves symptoms without the side effect of drugs
- therefore, although genes can’t be altered, lifestyles and environmental changes can reduce risk of disease and improve health in people with a genetic predisposition
Evaluate the biological approach and health with a weakness.
- incomplete explanation
- emphasising the biological influences over simplifies the cause of health (reductionist)
- for example, genetic predisposition is indirect rather than direct
- it does not influence behaviour directly but influences lifestyle-related behaviours which in turn affect the likelihood of an individual being healthy or ill
- therefore, the cause of health are complex and biological influences are not a complete explanation of health
Define healthy behaviours.
- behaviours that promote the good physical, mental and emotional wellbeing of a person and reduce the development of illnesses and disease
- eating 5 a day
Define unhealthy behaviours.
- any behaviours that cause harm to a persons physical, mental and emotional wellbeing or even illnesses and disease