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namyel nervous syste
namyel-nervous system chpt 23
| Question | Answer |
|---|---|
| The 3 functions of the nervous system are: | gather outside info, analyze the info gathered, respond to info according to the bodies specific needs |
| What makes up nervous system tissues? | Neurons |
| What are the 3 types of neurons? | motor neurons, sensory neurons, interneurons |
| What is an afferent neuron? | Sensory neurons because they carry impulses to the CNS and cell bodies |
| What does CNS mean? | Central nervous System |
| What is an efferent neuron? | Motor neurons because they carry impulses to the muscles and organs away from the cell bodies and CNS |
| What is one major difference in the structure of motor and sensory neurons? | Sensory neurons do not have debdrites while motor neurons do |
| All nerve fibers are wrapped in a sheath, what type has a myelin sheath? | The peripheral nervous system |
| what do Schwann cells do? | They create the myelin sheath. |
| what is a tract? | A group of nerve fibers within the CNS |
| What is the "bridge" that joins the cerebral hemispheres and is considered the largest tract in the brain? | the corpus callosum |
| The space at the end of each synapse is called: | Synaptic cleft |
| A receptor does what? | Recieves a stimulation for the nerve |
| Receptors react to stimuli by initiating what type of response? | Chemical-electrical |
| In the spinal cord, what is the shape of the gray and white matter? | H shaped with white on the outside and gray making the core. |
| What is the formation of gray and white matter in the spinal cord? | Opposite of the spinal cord, white matter is the core surrounded by the gray matter. |
| The largest mass of nervous tissue in the body is the : | Brain |
| What are the major divisions of the brain? | The cerebrun, the diencephalon, and the brainstem. |
| The brainstem is made up of 2 parts called: | The midbrain and the hindbrain |
| The hindbrain consists of: | The cerebellum, the pons, the medulla oblongota and the reticular formation |
| Stroke can be caused by: | artherosclerosis, narrowing of the arteries |
| Progressive degenerative disease of the brain characterized by loss of memory and other cognitive functions: | Alzheimer's Disease |
| Paralysis of the muscles that control expression on one side of the face is? | Bell's palsy |
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