Which of the following is NOT true of the Central Nervous System?Group of answer choicesThere are no myelinated neurons.There is almost no “neurogenesis” (the creation of new neurons) after birth.It is a defining feature of vertebrates.It has functional protection by the blood brain barrier.It has physical protection by bone AND the meninges.
Question
Which of the following is NOT true of the Central Nervous System?Group of answer choicesThere are no myelinated neurons.There is almost no “neurogenesis” (the creation of new neurons) after birth.It is a defining feature of vertebrates.It has functional protection by the blood brain barrier.It has physical protection by bone AND the meninges.
Solution
The statement that is NOT true of the Central Nervous System is: "There are no myelinated neurons." Here's why, step by step:
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The Central Nervous System (CNS) consists of the brain and spinal cord. It is responsible for processing information received from all parts of the body.
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Neurons, or nerve cells, are the fundamental units of the brain and nervous system. They are responsible for receiving sensory input from the external world, sending motor commands to our muscles, and transforming and relaying the electrical signals at every step in between.
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Many neurons in the CNS are myelinated. Myelin is a fatty substance that wraps around the axon of some types of neurons. It acts as an insulator to speed up the transmission of electrical signals (or action potentials) along the axon.
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Therefore, the statement "There are no myelinated neurons" is not true. There are indeed many myelinated neurons in the CNS, and they play a crucial role in the rapid transmission of signals across the nervous system.
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