Neurons Crossword Puzzle

QUESTIONS LIST:

• nervous system: consists of the brain, spinal cord, and network of nerve cells
• neurons: nerve cells; composed of cell body, axon, and dendrites
• cell body: central part of neuron that contains the nucleus
• axon: single extension of neuron
• myelin sheath: insulation provided by tiny living cells around the axon
• dendrites: shorter, branched extensions around the cell body
• impulses: how neurons communicate
• nerves: bundles of axons that go to the same place in the body
• sensory: these nerves carry impulses toward the brain and spinal cord
• motor: these nerves carry impulses away from the brain and spinal cord, and toward muscles
• mixed: these nerves carry both sensory and motor axons in their bundles
• inter neuron: neurons that link sensory messages with options for action (found only in the brain and spinal cord)
• sensory receptors: cause an attached sensory neuron to send the signal toward the brain
• stimulus: detectable change in what is going on
• reflex: a quick relay that causes a muscle to contract without any thought
• peripheral: this part of the nervous system consists of sensory neurons, motor neurons, and mixed neurons
• central: this part of the nervous system consists of association neurons in the brain and spinal cord; it is the command center of all neurons