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Cranium Unit
Test on the brain.
| Question | Answer |
|---|---|
| nerve impulse described as | electrical message |
| junction at which impulses travel from one neuron to another | synapse |
| sodium potassium pump | restores the resting potential |
| which statement about the chemical composition of axon is true? | sodium is in greater concentration on outside |
| nodes | gaps in the myelin sheath |
| neurotransmitters are | released at synapses |
| morphine works as pain killer because | acts on synapses and binds receptor on brain |
| hallucinogens | distort sensory signals |
| transmission of pain signals | all of the above |
| spinal cord | all of the above |
| right cerebral hemisphere | musical |
| autonomic controls | involuntary functions of glands and organs |
| information carried from central nervous system to muscles/glands by | motor neurons |
| different types of sense receptors | all of the above |
| sensory neurons transmit | from environment to spinal cord/brain |
| impulses from different sensory organs | all of the above |
| destruction of anterior horn cells of spinal cord | voluntary and motor impulses |
| absolute minimum number of neurons | two involved in reflex arc |
| myelination of the sheath of nerve fibers is the job of | schwann |
| depression of surface of cortex called | fissure and salcus |
| which of the following is not a function of autonomic neuron system | conscious control of motor activity |
| spinal nerve has | motor pathways and sensory (a and b) |
| fight or flight response | sympathetic nervous system |
| in contrast of symmatic, autonomic system | has two epharons |
| when a patient says he's scared, which indicates sympathetic activity | all of the above |
| parasympathetic has no effect on | all of the above |
| most body organs intervated by | parasympathetic and sympathetic division (a and b) |
| ascending pathways convey what | sensory impulses |
| central nervous system consists of | brain and spinal cord |
| electrical changes in axon create | action potential |
| when impulse moves down axile | small part of axon momentarily reverses polarity |
| peripheral nervous system | provides pathways for central nervous system |
| motor neurons transmit messages | from central nervous system to muscle or gland |
| grey matter consists of | unmyelinated neurons |
| reflex may involve | all of the above |
| body temp and hunger controlled by | hypothalamus |