Download Biological Psychology: An Illustrated Survival Guide by Paul Aleixo PDF

By Paul Aleixo

“This significant advent to organic Psychology brings the topic to existence in a fashion that no conventional textbook can. i'll definitely be recommending it.”   Brian Wink, Southampton Solent University"My first reaction was that it was once either ingenious and brave. Having learn it, i'd upload that it additionally makes an important contribution to the on hand texts on organic psychology. This approach is simply what scholars are having a look for.”   Graham Mitchell, college of NorthamptonTaking a refreshingly cutting edge method of the topic, organic Psychology: An Illustrated Survival advisor makes use of cartoons as a good educating medium. each one bankruptcy is organised right into a mini lecture, and provides an available creation to key issues including:The mind and anxious systemVision and auditionThe mechanical and chemical sensesEmotions and sexual behaviourMemory and learningIntended to enrich conventional textbooks within the quarter, organic Psychology: An Illustrated Survival consultant presents undergraduate and ‘A’ point scholars with an alternate creation to biological psychology and an worthy examine relief.

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It often takes many neurons stimulating a single neuron to achieve this threshold. PAGE 5 Panels 2 to 6 Note: The following explanation deals with the transmission of the nerve impulse from one neuron to another. Chemical transmission at the synapse It was Ramón y Cajal who showed that neurons were not physically touching each other. These physical gaps are the reason von Helmholtz (see page 3 panel 1 above) did not find the nervous system transmitting electrical messages at the speed of light.

A living brain is so soft and squidgy that it can be cut with a blunt knife. Panel 2 There are approximately 100 billion neurons in the human brain (Williams & Herrup, 1988). However, neurons only make up approximately 10 per cent of the cells in the brain. The rest are known as glial cells, and these provide a supporting role for the neurons themselves. Neurons are larger than glial cells however and make up about 50 per cent of the volume of the brain. The idea that the neuron is the unit of brain was suggested by the Spanish Nobel prize winner Santiago Ramón y Cajal from work carried out between 1887 and 1903.

The positive ions are attracted to the negative ions and vice versa. Hence these chemicals tend to move towards each other. The fluid inside the cell is separated from fluid outside the cell by a cell membrane that allows some chemicals through and not others (it is known as a semi-permeable membrane). Therefore, not all the ions can move freely to where they are attracted. At rest, a nerve cell (neuron) has a negative charge inside the cell and a positive charge outside the cell. This is because the membrane allows positive potassium ions (Kϩ) easily through to the inside while negative chloride ions (ClϪ) and positive sodium ions (Naϩ) have more difficulty.

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