Printed from www.StudyDroid.com

CNS
amdawley

Front Back

What type of current flow through the axolemma during the steep phase of repolarization?





Assume that an EPSP is being generated on the dendritic membrane. Which will occur?





The velocity of nerve impulse conduction is greates in





Chemical synapses are characterized by all of the following expet





Biogenic anine neurotransmitter's include all but





The neuropeptides that act as natural opiates are





inhibition of acetylcholinesteras by poisoning blocks neurotransmission at the neuromuscular juction because





The anatomical region of a multipolar neuron that has the lowest threshold for generating an AP is the





mesencephalon


midbrain


Prosencephalon


forebrain


Rhombencephalon


hindbrain


The secretions of the adrenal medulla act to supplement the effects of ________


sympathetic stimulatio


In contrast to the somatic nervous system, the autonomic nervous system ________


has two efferent neuron


Preparing the body for the ʺfight-or-flightʺ response is the role of the ________


A) sympathetic nervous syste


The parasympathetic nervous system is characterized by peripheral ganglia near the ________


organs and by short postganglionic fiber


5)  A drug that might be used specifically to reduce heart rate in cardiac patients could be ________


a beta-blocker


The parasympathetic ganglion that serves the eye is the ________


ciliary ganglion


Cardiovascular effects of the sympathetic division include all except ________


dilation of the blood vessels serving the skin and digestive viscera


Over 90% of all parasympathetic fibers are derived from cranial nerve number ________.


X


The ʺresting and digestingʺ division of the autonomic nervous system is the ________


parasympathetic division


Control of temperature, endocrine activity, and thirst are functions associated with the ________.


hypothalamus


Which of these effectors is not directly controlled by the autonomic nervous system


skeletal muscl


Which of the following is not a result of parasympathetic stimulation


dilation of the pupil


The site of origin of the preganglionic fibers of the parasympathetic nervous system is the ________.


brain stem and the sacral region of the cor


Sympathetic nerves may leave the spinal cord at which vertebrae


first thoraci


Sympathetic responses generally are widespread because ________


 single preganglionic axons make multiple synapses with ganglionic neuron


Autonomic ganglia contain ________


the cell bodies of motor neurons


Longitudinal fissure


Separates the two hemispheres


Transverse cerebral fissure


Separates the cerebrum and the cerebellum 


Central sulcus


Separates the precentral gyrus of the frontal lobe and the postcentral gyrus of the parietal lobe


The parasympathetic fibers of the ________ nerves innervate smooth muscles of the lens of the eye, the
muscles that cause the eye to bulge to accommodate close vision.


oculomotor


Fibers that enter and leave the sympathetic chain without synapsing form structures called ________


splanchnic nerve


Which is not a plexus of the vagus nerve


celia


Gateway to the cerebral cortex


Thalamus