Receptors/Reflexes

Question 1

what is the role of sensory receptors

Answer 1

inform the brain about the internal and external enivornment

Question 2

2 properties of sensory receptors

Answer 2

• they are transducers
• they are nerve endings

Question 3

what is sensory modality ??

Answer 3

a stimulus that activates a particular receptor

Question 4

what is an adequate stimulus ?

Answer 4

form of energy to which the receptor is most responsive

Question 4

what does an adequate stimulus cause ?

Answer 4

change in graded membrane potential

Question 5

change in graded membrane potential is referred to as what term?

Answer 5

generator potential

Question 6

what does an increase in stimulus intensity cause ?

Answer 6

increases generator potential (graded membrane potential)

which fires more APS

Question 7

what do nociceptors detect?

Answer 7

detect pain

Question 8

name the 3 types of sensory receptors

Answer 8

mechanoreceptors

propioceptors

nociceptors

Question 9

what type of sensory receptor does not adapt?

Answer 9

nociceptors (pain)

Question 10

what is the best understood mechanoreceptor ?

Answer 10

pacinian corpuscle

Question 11

why is pacinian corpuscle effective ?

Answer 11

shows rapid adaptation
(adaptation means becomes less sensitive to repetitive stimuli)

Question 12

what do receptive fields detect on sensory neurons

Answer 12

itch

Question 13

what does the two point discrimination test allow us to determine & what is this test reliant on?

Answer 13

determine two areas of our skin apart

reliant on receptive fileds and neuronal convergence

Question 14

what is acuity in terms of sensory receptors

Answer 14

determine and distinguish between STIMULI

Question 15

what 3 places do sensory information go

Answer 15

spinal cord&raquo_space;> thalamus&raquo_space;> cortex

Question 16

what helps with precision when identifying the point of stimulus?

Answer 16

lateral inhibiton

Question 17

state the 2 type of skeletal muscle fibre & which one is most abundant out of the 2

Answer 17

extrafusal (MOST ABUNDANT)

intrafusal

Question 18

what feature of sensory neurones allow us to know where an itch is on the body?

Answer 18

receptive fields

Question 19

what are the 3 types of propioceptors ?

Answer 19

• golgi tendon

-muscle spindle

-joint receptor

Question 19

what is low acuity

Answer 19

high convergence

Question 20

sense of limb movement and awareness is called what?

Answer 20

kinaesthesia

Question 21

what do golgi tendons monitor?

Answer 21

muscle tension

Question 22

what is a muscle spindle?

Answer 22

group of specialised muscle fibres enclosed in a capsule

Question 23

in muscle spindles, what is the name of thr sensory neurone which takes info to the CNS?

Answer 23

1a afferent fibres

Question 24

what is the simplest reflex found in all muscles?

Answer 24

stretch reflex

Question 25

what is the main example of stretc reflex?

Answer 25

patella tendon reflex