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| Question | Answer |
|---|---|
| Neurons that conduct nerve impulses from the receptors to the central nervous system are | sensory neurons |
| processes that carry nerve impulses away from the cell body are called | axons |
| the neuroglia that produce myelin sheaths around axons in the peripheral nervous system are | Schwann cells |
| the portion of the nervous system that is considered involuntary is the | autonomic nervous system |
| all of the following are functions of the nervous system except | stores calcium |
| The diff charge between the outside and the inside of a neuron at rest is called | resting membrane potential |
| the stage in an action potential tha timmediately follows depolarization is | repolarization |
| the junction between two nerve cells is called | synapse |
| neurotransmitters are released at the | axon terminal |
| in the reflex arc, a muscle or gland is considered to be the | effector organ |
| When an action potential reaches a synaptic end bulb, _______ is the ion that actually triggers neuroransmitter release | calcium |
| Which of the following line the ventricles of the brain and the central canal of the spinal cord | ependymal cells |
| your central nervous system is protected by | cerebrospinal fluid |
| the intermediate layer of the meninges is the | arachnoid mater |
| the component of your nervous system that has, as its effectors, smooth muscle, cardiac muscle and glands is the | autonomic nervous system |
| smooth muscle, cardiac muscle and glands are effectors of the | sympathetic and para nervous system |
| cerebrospinal fluid os produced by | ependymal cells lining the pathway through wich it flows and the choroids plexus |
| _____are the cells which comprose the actual barrier tha tsubstances must cross to enter the CNS | Astrocytes |
| an action potential includes | a wave of de and repolarization moving along the cell membrane |
| Whciuch of the following is open first during an action potential | The voltage-gated sodium channel |
| an actions potential will be initiated when the membrane potential reches | threshold |
| the size of the action potential is related to | each electrically-active cell can produce action potentials |
| during the _______ refractory period, a larger than normal stimulus is required to generate and action potential | relative |
| the portion of the nerve that conbey impulses toward the cell body of a neuron are called | dendrites |
| Myelin sheaths covering many axons are made by | Schwann cells |
| A neuron tha tcarries umpulses away from the brain would be classified as | multipolar and motor |
| the __________ are the types of neuroglial cells tha tprovide myelin in the central nervous system | oligodendrocytes |
| which type of neuroglial cells help regulate the compostion of cerebrospinal fluid? | ependymal |
| cut neurons possess linited capabilities for regenerations. the type of neuroglial cell that aids regeneration by forming a regeneration tube to help reestablish the former connection is the | Schwann cell |
| at resting potential the ion distribution inside and outside of a neuron is such that___ions are most abundant on the outsie of the cell, while_____ions are most abundant ont eh inside of the cell. | sodium, potassium |
| in response to a stimulus, if the membrane potential becomes more negative then the resting potential, we say the membrane is | Hyperpolarized |
| When a neuron reches action potential, it depolarized and repolarizes in an amount of time on the order of | milliseconds |
| fibers that originate from different parts of the nervous system and lead to the same neuron are exhibiting | convergence |
| Which term does not belong with the others: brain, spinal cord, cns, spinal nerve | Spinal nerve |
| Which items should not be grouped together: spinal nerve, cranial nerve, spinal cord, PNS | Spinal cord |
| The cells that conduct messages towards the brain are the | sensory neurons |
| the myelin sheath around a neuron is actually produced by the | Schwann cell |
| which of these cells does not belong with the others: microglia, neuron, strocytes, oligodendroglia | Neuron |
| Which of these is true when a neuron is at rest | the outside is positive |
| In which portion of the spinal cord do the interneurons lie | Gray matter |
| What kind of peripheral nerve fiber carries motor impulses outward to smooth muschles and glands of internal organs | visceral efferent fibers |
| the smallest pair of cranial nerves that arise from the midbrain and carry motor impulses to the superior oblique muscles of the eye are the ________nerves | Trochlear |
| Which pair of cranial nerves are mixed nerves that supply the chest and abdomen with parasympathetic nerves | Vagus nerves |
| Which structures would not be innervated by the symathetic nervous system | skeletal muscle |
| The cell body of all sensory neurons is located within the | dorsal root ganglion |
| what is the last region of a typical reflex arc | ventral root |
| which term shoudl be last in this reflex sequence: sensory neuron, motor neuron, effector, receptor | Effector |
| During_________refractory period, no new action potential can be generated | absolute |
| Which of the following is made up in part of neuron cell bodies? | Gray matter |
| Masses of myelinated nerve fibers(bundle of axons) appear | White |
| Whcih branch of a spinal nerve forms the plexuses | ventral ramus |
| which of the following nerves arises from the lumbar plexus | femoral |
| the dorsal root of a spinal nerve | contains sensoty neurons |
| spinal nerves are not part of the | CNS |
| Whcih of the following nerves arises from the cervical plexus | Phrenic |
| Spinal nerves originating from this portion of the spinal cord do not form plexuses | thorasic |
| inside the CNS, sensoty impulses are carried in | ascending tracts |
| The spinal cord is held in place by the | fulum terminale and deticulate ligaments |
| the dorsal root ganglion contains cell bodies of | sensory neurons |
| the cell bodies of somatic motor neurons are fould in which region of the spinal cord | anterior horn |
| if the ventral root of the spinal nerve were cut, what would bethe result on the region suppled by the nerve | loss of sensation |
| which of the folling is true concerning spinal nerves? | the posterior root contains sensoty neurons |
| a bundle of axons located withinthe CNS is a | Tract |
| the phrenic nerve arises from the ____plexus, and innervates the _____ | cervical, diaphragm |
| If you inserted a needle between the 3rd or 4th lumbar vertebra, you would probably hit the | cauda equina |
Created by:
fet1227