Neurophysio (REVIEW TEST) Flashcards
Autonomic receptor that is blocked by hexamethonium at the ganglia but not at the NMJ
Cholinergic nicotinic receptors
66 y/o man with chronic hypertension is treated with prazosin by his physician. the treatment successfullt decreases his BP to whithin normal range. what is the MOA?
inhibition of alpha 1 receptors on vascular smooth muscle
Response mediated by parasymptathetic muscarinic receptors
Erection
Property of C fibers
have the slowest conduction velocity of ant nerve fiber type
When compared with the cones of the retina, the rods
more sensitive to low intensity light
Basilar membrane of the organ of corti
Apex responds better to low frequencies than the base
feature of the sympathetic but not the parasympathetic
Preganglionic neurons originate in the thoracolumbar spinal cord
Autonomic receptor mediates an increase in heart rate
Adrenergic B1 receptors
Cutting this structure on the left side causes total blindness of the left eye
optic nerve
Reflex responsible for monosynaptic excitation of ipsilateral homonymous muscle
myotactic/strecth reflex
type of cell in the visual cortex responds best to a moving bar of light
complex
administration of which of the ff drugs is contraindicated in a 10 y/o child with a history of asthma
propanolol
adrenergic receptor produces stimulatory effects by the formation of inositol 1,4,5 triphosphate (IP3) and an increase in intracellular calcium
alpha 1 receptors
the excessive muscle tone produce in the decerebrate rigidity can be reversed by
cutting the dorsal roots
part of the body woth the largest representation on the motor cortex
fingers
Autonomic receptors mediates secretion of epinephrine by the adrenal medulla
cholinergic nicotic receptors
Cutting which structure on the right side causes blindness in the temporal field of the left eye and the nasal field of the right eye
Optic tract
a ballet dancer spins to the left. during the spin, her eyes snap quickly to the left. the fast eye movement is
nystagmus
solute with a much lower concentration in the CSF than in the cerebral capillary blood
sodium
autonomic drugs that stimulate adenylate cyclase
Norepinephrine
step in the photoreception in the rods
metrahodopsin II activats transducin
pathogens that produce fever cause
shivering
Olfactory system
receptor cells are neurons
lesion of the chorda tympani
impaired taste function
produce maximum excitation of the hair cells in the right horizontal semicircular canal
rotating the head to the right
The inability to perform rapidly alternating movements is associated with lesion of the
cerebellum
Autonomic receptor that is activated bu low concentrations of epinephrine released from the adrenal medulla ad causes vasodilation
Adrenergic B2 receptors
Complete transection of the spinal cord at the level of T1 would most likely result in
temporary loss of stretch reflexes below the lesion
sensory receptor potentials
graded in size, depending on stimulus intensity
Cutting which structure causes blindness in the temporal fields of the left and right eye
Optic chiasm
structure which primary function is to coordinate rate, change force, and direction of movement
Cerebellum
Reflex responsible for polysynaptic excitation of contralateral extensors
Flexor withdrwal reflex
Characteristic of nuclear bag fibers
detect dynamic changes in muscle length
muscle stretch leads to a direct increase in firing rate of which type of nerve
group Ia
a 42 y/o woman with eleavted BP, visual disturbanes, and vomiting has increased urinary excretion of VMA. A computerized tomographic scan shows an adrenal mass that is consistent with a diagnosis of pheochromocytoma. while awaiting surgery,she is treated with phenoxybenzamine. what is the MOA?
Decreasing IP3/Ca
Patients are enrolled in trials of a new atropine analog. what is expected
Increased AV node conduction velocity
