What is the nervous system?
The nervous system is the group of cells in the brain, spinal cord and nerves that are all made out of neurons. When we talk about the nervous system we are talking about the brain, spinal cord, and nerves. Each of these is made of a specific type of cell called a neuron, or you might have heard them called brain cells.
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How does the nervous system pass messages along?
Passing Along the Message. The center of the nervous system is the brain. The brain takes in what your eyes see and what your ears hear. If you decide that you want to move around, your brain tells your muscles to do it. You can think of your nervous system as a relay team passing a baton from one runner to the next.
Constantly alive with electricity, the nervous system is the body’s prime communication and coordination network. It is so vast and complex that, an estimate is that all the individual nerves from one body, joined end to end, could reach around the world two and a half times. The Brain and Spinal Cord are the Central Nervous System.
How do nervous system messages travel through the body?
Nervous system messages travel through neurons as electrical signals. When these signals reach the end of a neuron, they stimulate the release of neurotransmitters. Neurotransmitters travel across synapses, spaces between neurons or between neurons and other body tissues and cells. They can be classified as two types: excitatory or inhibitory.
Why are some neurotransmitters more prominent in certain parts of nervous system?
Some neurotransmitters are more prominent in certain parts of the nervous system because they specialize in carrying messages within the brain, or between neurons and muscular tissue or other types of tissue. These chemicals are key to the nervous system’s regulation of body movement and internal functions.
Do older teens respond correctly to questions about the nervous system?
Older teenagers answered correctly more often and exhibited a progressive shift of activity from the amygdala to the frontal lobes. Title THE NERVOUS SYSTEM Author Howie Baum Created Date