physiology definitions

Question 1

define strech reflex

Answer 1

mild to moderate sterch of innervated muscle folowed by reflex contraction

Question 2

which of the following can prevent unloading ?

Answer 2

gamma motor neurons

Question 3

sterch reflex is monosynaptic only right or wrong ?

Answer 3

wrong ; it can be monosynaptic or polysynaptic , monosynaptic only in human body , and all other reflex os polysynaptic

Question 4

define muscle tone

Answer 4

continues , ulternating , reflex , subtetanic , contraction of muscle fibers
resistant of muscle to reflex

Question 5

section btw pons and brainstem produce ?

Answer 5

De-cerebrate rigidity

Question 6

receptor potential

Answer 6

change in electrical current when sensory receptor stimulated

Question 7

spatial summation

Answer 7

summing simultaneous postsynaptic potentials by activating multiple terminals on widely spaced areas of the neuronal membrane

Question 8

temporal summation

Answer 8

successive discharges from a single presynaptic terminal, if they occur rapidly enough, can add to one another

Question 9

Facilitation

Answer 9

summated postsynaptic potential is excitatory but has not risen high enough to reach the threshold for firing by the postsynaptic neuron.

Question 10

EPSP

Answer 10

positive increase in voltage above the normal resting neuronal potential (RMP)

Question 11

IPSP

Answer 11

increase in negativity beyond the normal RMP level

Question 12

release sites

Answer 12

When the calcium ions enter the presynaptic terminal, they bind with special protein molecules on the inside surface of the presynaptic membrane

Question 13

sensory receptor

Answer 13

afferent fiber contain speceialized structure at the periphery

Question 14

sensory unit

Answer 14

single sensory afferent with it’s all receptor endings

Question 15

receptive field

Answer 15

region contain receptor ending and where the stimulus produce response

Question 16

somatic sensation

Answer 16

is the feeling produced by change in enviroment or by application of stimulus to receptors or nervous pathway

Question 17

sensory code

Answer 17

it is the ability of CNS to recognize modality , locality , intensoty of sensation .

Question 18

pain

Answer 18

unpleasant sensation results from damage or potential damage to worn the patient to remove the pain stimulus or seek medical advice

Question 19

headache

Answer 19

pain referred to the surface head from deep structures