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what is not a function of the nervous system?

it produces excretory wastes

The term cns refers to the

brain and spinal cord

ciliated cns neuroglia that play an active role in moving the cerebrspinal fluid are called

epedymal cells

the sheath of Schwann is also called

neurilemma

Bipolar neurons ar ecommonly

found in the retina of the eye

A neuronal circuit that concentrates or directs a large number of incomming impulses to a rather small number of neurons is callec

converging circuit

The part of a neuron that conducts impulses away from its cell body is called a

axon

The point at which an impulse fromone nerve cell is communicated to another nerve cell is the

synapse

What is not a function of the autonomic nervous system?

innervation of skeletal muscle

Collections of nerve cell bodies outside the cns are called

ganglia

The substance released at axon terminals to propagate a nervous impulse is called a

neurotransmitter

Salatory conduction is made possible by the

myelin sheath

the velocity of nerve impulses conduction is greatest in

heavyily mialated, large diameter fibers

The part of the neuron that normally receives stimulus is called

a dendrite

an action potential

is essential for impulse propagation

Schwann cellsare functionally similar to

oligodendrocytes

What is not true of graded potentials?

increase amplitude as they move away fromthe stimulus point

the arbor vitae refers to

the cerebral white matter

the subarachnoid space lies between what two layers of meninges??

arachnoid and pia

the fissure separating the cerebral hemispheres is the

longitudinal fissure

An excitatory neurotransmitter secreted by motor neurons innervating skeletal muscle is

acetylcholine

A neural ciruit in which a single impulse is transmitted over and over is a

reverberating circuit

What is not a structural feature of a neuron?

synaptic cleft

a neuron that has its primary function the job of connecting other neurons is called a

association neuron

an inhibitory postsynaptic potential is associated with

hyperpolarization

The hypothalmus

is the thermostat of the body since it regulates temperature

The frontal lobe is seperated from the temporal lobe by the

lateral sulcus

Brocca's area

is considered the motor speech area

What is not a structure of the limbic sysytem?

caudate nucleus

What is not part of the basal nuclei?

sustania nigra

The area of the cortex that is responsible for sensations of a full bladder and the fellings that your lungs are going to burst might, is prolly damage to the

viseral sensory area

Loss of ability to play the piano with out having any paralysis or weakness in any muscles might suggest damage to,

premotor cortex

Cell bodies of the sensory neurons of the spinal nerves are located in

the dorsal root ganglia of the spinal cord

the brain aree that activities that control the state of wakefullness or alertness of the cerebral cortex

reticular formation

the function of commissures is to connect

corresponding areas of the two hemispheres

the limbic association area of the multimodal association areas provides our

emotional impact

A shallow groove on the surface of the cortex is called a

sulcus

The cerebrospinal fluid

is formed mostly by the chroid plexuses and modified by ependymal cells

the brain stem consists of the

midbrain,medulla and pons

The primary auditory cortex is located in the

temporal lobe

The primary motor cortex broccas area and the premotor area are located in the

frontal lobe

the innermost layer of the meninges delicate and closely associated to the brain surface is the

pia matter

A patient has suffered a cerebral hemorrage that has caused dysfunction of the precentral gyrus of his right cerebral cortex, as a result he

cannot feel voluntarily move his left arm or leg

Ascending pathways in the spinal cord convey

sensory impulses

the pons and cerebellum develop from the embryonic secondary vesicle known as the

metencephalon

The suprachiasmatic nucleus is found in the

hypothalmus

the vital centers for the control of the heart rate respiration and the blood pressure are located in the

medulla

If the posterior portion of the neural tube failed to develop properly

the spinal cord may be affected.

a lateral tract in te spinal cord would be

rubrospinal

An individual accidentally transected the spinal cord between T1 and L1. This would result in

paraplegia

The patellar "knee jerk" reflexisan example of a

stretch reflex

Which of the following nerves does not arise from the brachial plexus?

phrenic

the three primarylevels of nuetral integration in a somatosensory system include all of the following except the

effector level

The posterior side of the thigh' leg and foot is served by the_______ nerve.

tibial

A major nerve of the lumbar plexus is the

femoral

After axonal injury, regeneration in peripheral nerves is guided by

Schwann cells

Nerves that carry impulses toward the CNS only are

efferent nerves

Select the correct definition

perceptual detection is the ability to detect how much stimulus is applied to the body.

The thickest and longest nerve of the body is found in the

sacral plexus

Babinski's sign is

when the great toe dorsiflexes and the other toes fan laterally

Irritation of a major nerve of this plexus may cause hiccups

cervical plexus

A simple spinal reflex goes along which of the following reflex arcs?

receptor, afferent nueron, integration center, efferent nueron, effector

Transduction refers to conversion of

receptor energy to stimulus energy

the cranial nerves that have neuralvconnections with the tongue include all except the

trochlear

problems in ballance may follow trauma to which nerve?

vestibulocochleaer

select the statement that is most correct

Ganglia associated with afferent nerve fibers contain cell bodies of sensory neurons

the peripheral nervous system includes

sensory receptors

the circuit level of the somatosensory system delivers impulses to the appropriate level of the

cerebral cortex

preparing the body for the "fight or flight" response is the role of the

sympathetic nervous system

The parasympathetic nervous system is characterized by peripheral ganlia usually near the

organs and by short postganglionic fibers

The site of origin of the preganglionic fibers of the parasympatetic nervous system is the

brain stem and the sacral region of the sinal cord

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

white rami communicantes

sympathetic division stimulation causes

increased blood glucose, decreased GI peristalis, and increased heart rate and blood pressure

Emotions influence autonic reactions primarily throughintegration in the

hypothalamus

the vagus nerve does not innervate the

parotoid gland

in contarast to the somatic nervous system, the autonomic nervous sytem uses

a two efferent neuron chain

a drug that might be used specifically to reduce heart rate in cardiac patients could be

a beta-blocker

the parasympatetic ganglion that serves the eye is the

ciliary ganglion

which of the following is not a result of parasympathetic stimulation

dilation of the puils

sympathetic responses generally are widespread because

preganglionic fibers are short

which is not a plexus of the vagus nerve

celiac

the parasympathetic tone

determines normal activity of the urinary tract

the autonomic nervous system

is not affected by drugs

sympathetic fiberser leave the spinal cord in the

thoracolumbar region, and the postganglionic fibers secrete norepineephrine

what structure regulates the amount of light passing to the visual receptors of teh eye

iris

receptors for hearing are located in the

tympanic membrane

nerve fibers from the medial aspect of each eye

cross over to the opposite side at the chiasma

ordinarily it is not possible to transplant tissues from one person to another, yet corneas can be transplanted without tissue rejection. this is because the cornea

has no blood supply

taste buds are not found

in filiform papillae

dark adaptation

involves accumulation of rhodopsin

conscious perception of vision probably reflects activity in the

occipital lobe of the cortex

which pairing of terms is incorrectly related

quality: multiple frequencies

olfactory cells and taste buds are normally stimulated by

substances in solution

which of the following could not be seen as one looks into the eye with opthalmosscope