fundamentals of nervous system and nervous tissue
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| which of the following is not a special characteristic of neurons? | they are mitotic
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| which of the choices below describes the ANS | motor fibers that conduct nerve impulses from the CNS to smooth muscle, cardiac muscle, and glands
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| which of the following is not true of graded potentials? | they increase amplitude as they move away from the stimulus point
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| which of the following is not a function of the autonomic nervous system? | innervation of skeeletal muscle
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| schwann cells are functionally similar to___ | oligodendrocytes
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| a neron that has as its primary function the job of connecting other neurons is called an___ | association neuron
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| what is the role of acetylcholinesterase? | destroy ACh a breif period after its release by the axon endings
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| collections of nerve cell bodies outside the central nervous system are called____. | ganglia
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| the period after an initial simulus when a neron is not sensitive to another stimulus is the___ | absolute refractor period
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| nerve cell adhesion molecules (N-CAMs)___ | are crucial for the development of neural connections
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| which of the following is not a chemical class of neurotransmitters? | nucleic acid
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| which of the following is not a function of astrocytes? | provide the defense for the CNS
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| whici of the following is true about the movment of ions across excitable living membranes? | some ions are prevented from moving down their concentration gradients by ATP driven pumps
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| a second nerve impulse cannot be generated until___ | the membrane potential has been reestablished
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| an impulse from one nerve cell is communicated to another nerve cell via the___ | synapse
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| neuroglia that control the chemical enviroment around neurons by buffering potassium and recapturing neurotransmitters are___ | astrocytes
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| which ofthe following describes the nervous system integrative function? | analyzes sensory information, stores information, makes decisions
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| which of the following will occur when an excitatory postsynaptic potential (ESSP) is being generated on the dendritic membrane? | a single type of channel will open, permitting simultaneous flow of soium and potassium.
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| the substance release at axon terminals to propagate a nervous impulse is called | neurotransmitter
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| when a sensory neuron is excited by some form of energy the resulting graded potential is called an____ | generator potential
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| salatory conduction is made possible by___ | the myelin sheath
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| the term central nervous system refers to the___ | brain and spinal cord
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| Neurons may be classified according to several characteristics. which ofthe following is correct? | group cfibers are not capable of salatory conduction.
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| ependymal cells____ | help to circulate the cerebrospinal fluid
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| which of the following is an excitatory nerotransmitter secreted by motor neurons innervating skeletal muscles? | acetylcholine
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| the sheath of schwann is also called the ___ | neurilemma
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| which of the following is false or incorrect? | a nerve impulse occurs if the excitatory and inhibitory effects are equal
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| an inhibitory ostsynaptic potential (IPSP) is associated with____ | hyperpolarization
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| select the correct statement about serial processing. | spinal reflexes are an example of serial processing
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| immedeiately after an action potential has peaked, which cellualar gates open? | potassium
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| what are ciliated CNS neuroglia that play an active role in moving the cerebrospinal flued called? | ependymal cells
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| bipolar neurons are commonly ___ | found in the retina of the eye
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| in what way does the interior surface of a cell membrane of a reasting(nonconducting) neuron differ from the external enviroment? the interior is___ | negatively charged and contains less sodium
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| the part of a neuron that conducts impulses away from its cell body is called a | axon
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| select the correct statment regarding synapses | the synaptic cleft prevents an impulse from being transmitted directly from one neuron to another.
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| if a motor neuron in the body were stimulated by an electrode placed about midpoint along the length of the axon___ | the impulse would spread bidirectionally
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| which ion channel opens in response to a change in membrane potential and participates in the generation and conduction of action potentials? | volatage gated channel
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