GENERAL ANATOMY
NERVOUS SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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carrying signals away from the cell body
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receiving signals from other cells and carrying them toward the cell body.
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determining the speed at which an action potential will travel
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determining whether the cell inhibits or excites neighboring neurons
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Detailed explanation-1: -Vazquez is examining a cell from the nervous system of an animal. He notices that at one end of the cell body is a long, fibrous strand of tissue. He immediately recognizes this as an axon that is responsible for a. carrying signals away from the cell body.
Detailed explanation-2: -An axon is a long single fiber that transmits messages from the cell body to the dendrites of other neurons or to other body tissues, such as muscles. A protective covering called the myelin sheath, covers most neurons. Myelin insulates the axon and helps nerve signals travel faster and farther.
Detailed explanation-3: -The nervous system uses tiny cells called neurons (NEW-ronz) to send messages back and forth from the brain, through the spinal cord, to the nerves throughout the body. Billions of neurons work together to create a communication network.
Detailed explanation-4: -Cerebrum. The largest part of the brain, the cerebrum has two hemispheres (or halves). The cerebrum controls movement, speech, intelligence, emotion, and what we see and hear.
Detailed explanation-5: -Neurons (also called neurones or nerve cells) are the fundamental units of the brain and nervous system, the cells responsible for receiving sensory input from the external world, for sending motor commands to our muscles, and for transforming and relaying the electrical signals at every step in between.