Chapter 2 Fill In The Blank

Topics: Nervous system, Neuron, Brain Pages: 3 (871 words) Published: February 5, 2015
1.An extensive network of specialized cells that carry information to and from all parts of the body is called the nervous system. 2.The basic cell that makes up the nervous system and which receives and sends messages within that system is called a neuron. 3.The long tube-like structure that carries the neural message to other cells on the neuron is the axon. 4.On a neuron, the branch-like structures that receive messages from other neurons are the dendrites. 5. The cell body of the neuron, responsible for maintaining the life of the cell and containing the mitochondria is the soma. 6.The fatty substances produced by certain glial cells that coat the axons of neurons to insulate, protect, and speed up the neural impulse is the myelin. 7.The bundles of axons in the body that TRAVEL together through the body are known as the nerves.. 8.The charged particles located inside and outside of the neuron are called ions. 9.The state of the neuron when not firing a neural impulse is known as the resting potential. 10.All-or-none refers to the fact that a neuron either fires COMPLETELY or does not fire at all. 11.The synaptic vesicles are sack-like structures found inside the synaptic knob containing chemicals. 12. Neurotransmitters are chemicals found in the synaptic vesicles which, when released, have an effect on the next cell. 13.The excitatory neurotransmitter causes the receiving cell to fire. 14.The agonists mimic or enhance the effects of a neurotransmitter on the receptor sites of the next cell, increasing or decreasing the activity of that cell. 15.The spinal cord is a long bundle of neurons that carries messages to and from the body to the brain that is responsible for very fast, lifesaving reflexes. 16.A neuron that carries information from the senses to the central nervous system and is also known as the afferent is called a sensory neuron. 17.All nerves and neurons that are not contained in the brain and spinal cord but that run through the body itself are...
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