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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 |