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ap chap 11

fundamentals of nervous system and nervous tissue

QuestionAnswer
which of the following is not a special characteristic of neurons? they are mitotic
which of the choices below describes the ANS motor fibers that conduct nerve impulses from the CNS to smooth muscle, cardiac muscle, and glands
which of the following is not true of graded potentials? they increase amplitude as they move away from the stimulus point
which of the following is not a function of the autonomic nervous system? innervation of skeeletal muscle
schwann cells are functionally similar to___ oligodendrocytes
a neron that has as its primary function the job of connecting other neurons is called an___ association neuron
what is the role of acetylcholinesterase? destroy ACh a breif period after its release by the axon endings
collections of nerve cell bodies outside the central nervous system are called____. ganglia
the period after an initial simulus when a neron is not sensitive to another stimulus is the___ absolute refractor period
nerve cell adhesion molecules (N-CAMs)___ are crucial for the development of neural connections
which of the following is not a chemical class of neurotransmitters? nucleic acid
which of the following is not a function of astrocytes? provide the defense for the CNS
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
a second nerve impulse cannot be generated until___ the membrane potential has been reestablished
an impulse from one nerve cell is communicated to another nerve cell via the___ synapse
neuroglia that control the chemical enviroment around neurons by buffering potassium and recapturing neurotransmitters are___ astrocytes
which ofthe following describes the nervous system integrative function? analyzes sensory information, stores information, makes decisions
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.
the substance release at axon terminals to propagate a nervous impulse is called neurotransmitter
when a sensory neuron is excited by some form of energy the resulting graded potential is called an____ generator potential
salatory conduction is made possible by___ the myelin sheath
the term central nervous system refers to the___ brain and spinal cord
Neurons may be classified according to several characteristics. which ofthe following is correct? group cfibers are not capable of salatory conduction.
ependymal cells____ help to circulate the cerebrospinal fluid
which of the following is an excitatory nerotransmitter secreted by motor neurons innervating skeletal muscles? acetylcholine
the sheath of schwann is also called the ___ neurilemma
which of the following is false or incorrect? a nerve impulse occurs if the excitatory and inhibitory effects are equal
an inhibitory ostsynaptic potential (IPSP) is associated with____ hyperpolarization
select the correct statement about serial processing. spinal reflexes are an example of serial processing
immedeiately after an action potential has peaked, which cellualar gates open? potassium
what are ciliated CNS neuroglia that play an active role in moving the cerebrospinal flued called? ependymal cells
bipolar neurons are commonly ___ found in the retina of the eye
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
the part of a neuron that conducts impulses away from its cell body is called a axon
select the correct statment regarding synapses the synaptic cleft prevents an impulse from being transmitted directly from one neuron to another.
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
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
Created by: 1353843965
 

 



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