Unit 2 - Biological Approach - Key Assumptions

The biological approach examines how characteristics may be inherited through our genes. There are four key assumptions.

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  • Created by: Pav
  • Created on: 23-04-11 10:33

FUNCTIONING OF NEUROTRANSMITTERS

A way messages are passed within the brain - by neurotransmitters. These are chemicals that pass from neuron to neuron. Between neurons there are gaps called synapses. If the receptors of the neuron are set to receive the neurotransmitters of another, then the message continues.

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(http://www.healmindbody.com/App_Themes/_images/Parts/neurotransmitters.gif)

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HORMONAL TRANSMISSION

A way messages are passed around the body. They send messages more slowly than neurotransmitters and are used for different purposes. Hormones have a large part to play in our development as wither male or female, e.g., androgens are male hormones and oestrogens are female hormones.

(http://www.nia.nih.gov/NR/rdonlyres/50F79178-5F64-426B-B697-2AE6A6B38F70/4076/ch03_growthhormone.jpg)

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GENETIC INFLUENCES

This is how genes are passed on from parents to children and how they govern behaviour as well as physical characteristics. Children receive half of their genes from their father and the other half from their mother. It is often the combination of the position of genes that leads to certain characteristics, rather than one particular gene.

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(http://www.medindia.net/afp/images/Genes-Influence-Sociability@@Health-disease-diabetes-children-UN-10742.jpg)

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PARTS OF THE BRAIN AND THEIR FUNCTION/BRAIN LATERA

  • The limbic system - linked to aggression
  • The hippocampus - thought to be where short term memory occurs
  • The brain is in two halves, joined by the corpus callosum. It is thought that females use both halves of their brain more than males.
  • Brain lateralisation is the term used when considering the two halves of the brain separately.
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(http://agelessmarketing.typepad.com/ageless_marketing/images/brain_lateralization_1.jpg)

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