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Questions and Answers
According to the text, which of the following was not a belief about the brain?
According to the text, which of the following was not a belief about the brain?
- It was the seat of the rational part of the soul.
- It regulated the amount of heat from the heart.
- It was the source of consciousness. (correct)
- It was the center of intelligence
What was the name of the technique used to reveal the intricate structures of individual neurons?
What was the name of the technique used to reveal the intricate structures of individual neurons?
- Silver chromate salt
- Staining procedure (correct)
- Microscope
- Neuron doctrine
Who proposed the neuron doctrine?
Who proposed the neuron doctrine?
- Hippocrates
- Plato
- Aristotle
- Santiago Ramón y Cajal (correct)
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Study Notes
- The earliest study of the nervous system dates back to ancient Egypt.
- In the late Middle Kingdom onwards, the Egyptians removed the brain in preparation for mummification.
- The view that the heart was the source of consciousness was not challenged until the time of the Greek physician Hippocrates.
- Plato also speculated that the brain was the seat of the rational part of the soul.
- Aristotle, however, believed the heart was the center of intelligence and that the brain regulated the amount of heat from the heart.
- Studies of the brain became more sophisticated after the invention of the microscope and the development of a staining procedure by Camillo Golgi.
- The technique used a silver chromate salt to reveal the intricate structures of individual neurons.
- Santiago Ramón y Cajal and led to the formation of the neuron doctrine, the hypothesis that the functional unit of the brain is the neuron.
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