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47 Cards in this Set
- Front
- Back
which of the following correctly describes the series of events in an action potential
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thershold, depolarization repolarization
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the peripheral nervous sysytem
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may be dived into somatic and autonomic nervous systems
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during the absolute refactory period
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an action potential will not occur
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which neuroglia cells produce myelin
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oligodendrocytes, schwann cells
(a and b are correct) |
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consists of neuron cell bodies, neuroglia and unmyelinated nerve fibers
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gray matter
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which of the following contributes to the maintenance of resting membrane potential
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presence of higher concentration of na+ outside the cell, presence of higher concentration of k+ inside the cell ( a and b are correct0
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are often most observed in dendrites and cell bodies
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graded potentials
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allow an impulse to travel the distans of the axon
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action potentials
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which axon would conduct umpulses the fastest
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a myelinated axon with a large diameter
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place the events involved generating an action potential in order in whcih they accur
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na+ enters the cell, membrane depolarizes, k+moves out of the cell, membrane repolarizes
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whic of the following ions is responsible for hte depolarization phase of the action potential
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na+
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which of the following myelinates axons in the cns similar to the schwann cell in yhe pns
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oligodendricyte
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place the meninges and associated spaces in order from the most superficial to deepest
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dura mater, arachnoid mater, subarachnoid space, pia mater
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the patellar reflex
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is a monosynatpic reflex, occurs in response to the streching of a muscle ( a and b are correct)
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phagocytic glial cells foun in cns
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microglia
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found lining ventricles of brain; make csf
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ependymal cell
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foun only in peripheral nervous system; support neuron cell bodies in ganglia
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sateillite cell
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each of the following is a lobe of the cerebrum of the brain except the
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hypothalmus
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cerebrosinal fluid
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provides nourishment to the brain, provides some mechanical protection for hte brain. r(a and b are correct)
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the brain stem includes all of the following except the
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diecephalon
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is the site decussation (cross over) of the pyramids, is involved in the regulation of the heart rate and blood pressure, sets the basic rhythem of respiration
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medulla oblongata
( all of the above are correct) |
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the cerebellum is responsible for which of the follwoing
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coordinate os muscle movemtens
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the thalmus does all of the following except
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helps regulate autonomic activities
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controls and integrates autonomic nervous system activity
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hypothalmus
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is the thinking part of the brain
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cerebrum
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its sensory input comes primarily from visceral organs, most of its motor pathways include two neurons that synapse at a ganglion.
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true of the autonomic nervous system
(a and b are correct ) |
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whic of the following is not example of an autonomic response
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tapping your friends shoulder to get her attention
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preganglionic sympathetic neurons, preganglionic and postganglionic parasympathetic neurons, most postganglionic sympathetic neurons associated with sweat glands
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cholinergic neurons
( a b and c ) |
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whchi of the following will not usually activate a sympathetic response
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eliminating waste
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which of the follwoing is not increase by parasympathteic activation
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increase heart rate
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the ____ nervous system regulates involuntary actions such as smooth muscle contraction in the organs
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autonomic
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increased stimulation by the ___ division of the autonomic system generally increases heart rate
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adrenergic
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the ___ division of the autonomic nervous system is also called the craniosacral division and the cell bodies of its neurons are located in the brain stem and sacral spinal cord
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cholinergic
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___ neurons release acetycholine; they are found in the somatic and sutonomic nervous systems
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parasympathetic
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sympathteic activation causes a set of responses designed to protect the body from a real or perceived threat. Collectively, these responses are called the ___ response
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fight or flight
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parasympathetic activation allows the body to process ingested food and store energy. the parasympathetic response is sometimes called the ____ response
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rest or digest
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the ___ nervous system regulates voluntary actions such as skeletal muscle contraction
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somatic
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___ neurons release norepinephrine; they are found in the autonomic nervous system.
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sympathetic
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a __is shallow groove in the cerebral cortex
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sulcus
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the ___ is a collection of structures that are collectively called the emotional brain.
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limbic system
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the __ is a collection of structures that activate the cerebral cortex into a state of wakefulness
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reticular formation
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the __ is a reflex center for integrating sensory information concering positon of body parts and for coordinating complex skeletal muscle movements
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cerebellum
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the __ of the brain that contains the cardiac center, vasomotor and respiratory centers.
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medulla oblongata
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the __ are connective tissue coverings that enclose the spinal cord and brain
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meninges
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the ____ is the tough, superficial outer meninge
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dura mater
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because they vcontain both motor and sensory fibers, spinal nerves are called ____ nerves
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mixed
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a rapid, automatic predictable sequece of actions occuring in response to a specific stimulus is a
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action potential
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