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Biological Approach
Key vocab
Term | Definition |
---|---|
Neurone | Nerve cell that sends communication using neurotransmitters |
Dendrites | Branch-like structures of a neurone that receive signals from other neurons |
Axon | Long shaft of a neurone down which the electric impulse travels |
Synapse | Space between two connecting neurons |
Vesicles | Spherical sacs containing neurotransmitters. |
Glia (Glial) Cells | ’support cells’ in the nervous system some of which produce the myelin |
Neutrotransmitters | Chemical messengers specialised for communication and released at the synapse. |
Myelin Sheath | Glial cell-wrappers around axons that act as insulators of the neuron's signal. |
Receptors | Locations that uniquely recognize a neurotransmitter. |
Central Nervous System | Part of the nervous system containing the brain and spinal cord. |
Corpus Collosum | Large band of fibres connecting the two cerebral hemispheres. |
Reflex | An automatic motor response to a sensory stimulus like muscle stretch. |
Limbic System | Emotional centre of the brain that also plays roles in smell, motivation, and memory. |
Hypothalamus | Part of the brain responsible regulating body temperature for example. |
Amygdala | Part of the limbic system that plays key roles in fear, excitement, and arousal. |
Hippocampus | Part of the brain that plays a role in short term memory. |
Hormones | chemicals that travel through the blood and affect behaviour. |
Magnetic Resonance Imaging (MRI) | Technique that uses magnetic fields to indirectly visualize brain structure. |
Positron Emission Tomography (PET) | Imaging technique that measures uptake of glucose-like molecules to show a moving image of brain activity. |
Lateralization | Cognitive function that relies more on one side of the brain that the other. |
Chromosomes | Slender threads inside a cell's nucleus that carry genes. |
Genes | Genetic material, composed of deoxyribonucleic acid (DNA). |
Genotype | Our genetic makeup. |
Phenotype | The result of our genes interacting with our environment; our observable traits. |