...THE NERVOUS SYSTEM The nervous system allows the animal to quickly detect, communicate and co-ordinate information about its external and internal environment so it can make efficient appropriate responses for survival and/or reproduction. The two major parts of our nervous system are the central nervous system (CNS) and peripheral nervous system (PNS). The CNS is made of the brain and spinal cord. The cranial nerves, spinal nerves and ganglia make up the PNS. The cranial nerves connect to the brain. The cranial and spinal nerves contain the axons (fibres) of sensory and motor nerve cells. Nerve cells areas are also known as neurons. Neurons are the basic unit of the nervous system. They carry information or impulses as electrical signals from one place to another in the body. There are 3 types of neurons: Sensory Neurons- Sensory neurons carry electrical signals (impulses) from receptors or sense organs to the CNS. Sensory neurons are also called afferent neurons. The cell body of sensory neurons is outside the CNS in ganglia. Motor Neurons- Motor Neurons Carry Impulses From The CNS To Effector Organs Motor Neurons Are Also Called Efferent Neurons. The Cell Bodies Of Motor Neurons Are Inside The CNS. Interneurons- These are also called intermediate, relay, or associative neurons. They carry information between sensory and motor neurons. They are found in the CNS. TOP The Structure of Neurons A Neuron consists of THREE MAIN PARTS: A. CELL...
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...ADVANCE NOISE FOR QUIET “An intriguing and potentially lifealtering examination of the human psyche that is sure to benefit both introverts and extroverts alike.” —Kirkus Reviews (starred review) “Gentle is powerful … Solitude is socially productive … These important counterintuitive ideas are among the many reasons to take Quiet to a quiet corner and absorb its brilliant, thought-provoking message.” —ROSABETH MOSS KANTER, professor at Harvard Business School, author of Confidence and SuperCorp “An informative, well-researched book on the power of quietness and the 3/929 virtues of having a rich inner life. It dispels the myth that you have to be extroverted to be happy and successful.” —JUDITH ORLOFF, M.D., author of Emotional Freedom “In this engaging and beautifully written book, Susan Cain makes a powerful case for the wisdom of introspection. She also warns us ably about the downside to our culture’s noisiness, including all that it risks drowning out. Above the din, Susan’s own voice remains a compelling presence—thoughtful, generous, calm, and eloquent. Quiet deserves a very large readership.” —CHRISTOPHER LANE, author of Shyness: How Normal Behavior Became a Sickness 4/929 “Susan Cain’s quest to understand introversion, a beautifully wrought journey from the lab bench to the motivational speaker’s hall, offers convincing evidence for valuing substance over style, steak over sizzle, and qualities that are, in America, often derided. This book is brilliant, profound...
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