Neuro Phys Final

Front 1

what type of motor neuron innervates intrafusal fibers

Back 1

gamma

Front 2

a large part of the cerebral cx that doesnt fit into the conventional definition of motor or sensory cortices

Back 2

association

Front 3

main fxn of the CNS

Back 3

protection of the brain by cushioning

Front 4

which spinal cell is always inhibitory on surrounding motor neurons

Back 4

Renshaw cells (lat inhibition)

Front 5

CSF contains ________ K+ compared to blood plasma

Back 5

Less

Front 6

About ____mL of CSF is produced every day in people

Back 6

~500 ml

Front 7

What does the Cerebrocerebellum do

Back 7

plans voluntary limb and body mvmt

Front 8

what does the Spinocerebellum do

Back 8

coordinates mvmts of hands and limbs

Front 9

What does the Vestibulocerebellum do

Back 9

controls the body's equilibrium mvmts

Front 10

cortical fxn can be mapped by:

Back 10

-electrical stimulation
-examination of ptn's cortical damage

Front 11

Left Hemisphere of cerebral cx is dominant in ________ of ppl

Back 11

95%

(only 90% are right handed though)

Front 12

Treatment for brain edema includes

Back 12

-infusion of mannitol
-ventricular needle puncture

Front 13

transduction involves:

Back 13

all of the above

Front 14

know the order of transmission for sound waves

Back 14

:)

Front 15

the sweat glands and piloerector ms of hairy skin are innervated by which type of fiber

Back 15

cholinergic postganglionic sympathetics

Front 16

which NT is released from the substantia nigra neurons onto areas of the basal ganglia

Back 16

Dopamine

Front 17

when viewing an object close to you, your lens should be:

Back 17

more rounded

Front 18

your friend suffers from myopia. what type of a lens would you suggest

Back 18

concave lens

Front 19

the eyeball is covered by a thick opaque layer known as the white of the eye aka

Back 19

sclera

Front 20

what focuses light on the retina

Back 20

-cornea
-lens

Front 21

in the ear, which structure transduces pressure waves into action potentials

Back 21

organ of corti

Front 22

as ppl age, the lens become less flexible. What happens to their vision as they age

Back 22

the lens is less able to focus light rays from near objects

Front 23

when light travels through the eye, in which part does the image focus

Back 23

retina

Front 24

parieto-occiptal association area fxn

Back 24

area for language comprehension

Front 25

prefrontal fxn

Back 25

essential to carrying out "thought" processes in the mind

Front 26

limbic lobe fxn

Back 26

concerned primarily with behavior, emotions, and motivations

Front 27

which is not true concerning the mechanism of long term memory

Back 27

-circiuts of reverberating neurons

Front 28

the external auditory canal ends at the

Back 28

tympanic mb

Front 29

a structure that allows the middle ear to communicate with the nasopharynx is the:

Back 29

eustachian tube

Front 30

the senses of the equilibrium and hearing are provided by the receptors of the:

Back 30

inner ear

Front 31

sound waves are transmitted directly into the inner ear, by mvmts of the

Back 31

oval window

Front 32

the vitreous chamber of the eye

Back 32

helps to stabilize it and gives physical support to the retina

Front 33

there are 3 types of cones. what are they?

Back 33

red, green, blue

Front 34

an area of the retina that only contains cones and is the site of the sharpest vision is the

Back 34

fovea

Front 35

when all 3 cones are stimulated equally, what color is produced

Back 35

white

Front 36

the molecule in rod and cone cells that has its geometric structure alters when struck by light is

Back 36

retinal

Front 37

the attenuation reflex is designed to

Back 37

protect the inner ear from loud sound damage

Front 38

during auditory transduction, the bending of the cilia causes change in _______ conductance of hair cell mb

Back 38

K+

Front 39

inositol triphosphate (IP3) increases levels of ______ in a nerve cell

Back 39

Calcium

Front 40

nitric oxide increases levels of _______ in a nerve cell

Back 40

cGMP

Front 41

long term potentiation (LTP) enhances communication btwn 2 neurons by:

Back 41

-increasing presynaptic transmitter release
-increasing number of postsynaptic receptors

Front 42

in which portion of the nerve are action potentials started

Back 42

axon hillock

Front 43

Parkinsons disease is characterized by a decrease in __________ levels

Back 43

dopamine

Front 44

the optic fibers that cross at the optic chiasm are from the

Back 44

nasal hemiretina

Front 45

for every object that you see, both eyes are actually seeing it... the image will be falling on a diff part of the retina for each eye. this is crucial for:

Back 45

depth perception

Front 46

the hippocampus is involved in

Back 46

short term memory

Front 47

slow wave (deep) sleep accounts for _______ of all sleep

Back 47

75%

Front 48

REM sleep accounts for ________ of all sleep

Back 48

25%

Front 49

which of the following retinal cells is least responsible for vision in the dark

Back 49

cone cells

Front 50

REM sleep occurs every ______ minutes during sleep

Back 50

90 minutes

Front 51

Type A nerve fibers have a larger diameter than type C fibers T/F

Back 51

True

Front 52

Type A fibers have a faster conduction velocity than C type fibers T/F

Back 52

True

Front 53

G proteins consist of ______ subunits

Back 53

3

Front 54

which subunit of a G protein dissociates when a ligand binds to its receptor

Back 54

alpha

Front 55

night vision blindness is caused by

Back 55

a deficiency of Vit A

Front 56

which of the following is not an auditory ossicle

Back 56

advil :)

Front 57

when the ossicles vibrate the stapes is pushed into

Back 57

the oval window

Front 58

axons of the olfactory nerve are unmyelinated C fibers which are known for

Back 58

being the smallest and slowest in the nervous system

Front 59

parasympathetic innervation stimulates contraction in all except which structures

Back 59

dilator pupillae muscle

Front 60

spatial summation of the nerve impulses could ___________ an action potential

Back 60

inhibit or stimulate

Front 61

if your vision is 20/20 this means that

Back 61

you can see objects at 20 feet that ppl with normal eyesight can see at 20 feet

Front 62

special solutions used to dilate the pupil so that the retina can be viewed. what is the stimulation or inhibition required to produce changes in the eye

Back 62

sympathetic nerves are stimulated and parasympathetics are inhibited

Front 63

in neural synapses, G proteins are associated with

Back 63

Metabatropic receptors

Front 64

when the potential across the axon mb is more negative than normal resting potential, the neurons are in a state of

Back 64

hyperpolarization

Front 65

immediately after an AP has peaked, which cellular gates (channels) open

Back 65

K+

Front 66

a 3 year old child is admitted to the emergency department of the university hospital. Child: extreme salivation, lacrimation, tremors, tachycardia. He was bit by a spider. The neuro toxic venom can increase the flux of calcium ions into the presynaptic terminal. What is the likely outcome of this bite?

Back 66

increased Ach release from nerve terminals

Front 67

which statement is true of nerve impulses

Back 67

during repolarization, potassium ions rush out of the cell

Front 68

if the resting axons mb becomes more permeable to potassium ions

Back 68

it will take a stimulus of larger magnitude to initiate an AP

Front 69

structures in the limbic system include:

Back 69

basal ganglia, hypothalamus, amygdala, septum area

Front 70

under resting conditions neuron mb is most permeable to _____________ ions

Back 70

K+