Sensory Receptors

Question 1

What do sensory receptors do

Answer 1

Inform the brain about internal and external environment

Question 2

What are sensory receptors

Answer 2

Nerve endings

Many have specialised non-neural endings

Question 3

What do sensory receptors do with stimuli

They are also ____ in regards to stimuli

Answer 3

Converts into frequency of netve action potentials

They are also transducers (change stimuli from one form of message to another)

Question 4

Name three types of receptors

Answer 4

Mechano receptors
Proprioceptors
Noicoceptors

Question 5

Which receptors are peripheral sensory processing

Answer 5

Mechanoreceptors and proprioreceptors

Question 6

What is receptor transduction

Answer 6

Take energy and change into electrical signals and nerves

Involves ion channel opening or closing. Graded potential change

Question 7

What is sensory modality

Answer 7

Stimulus type that activated particular reception, touch pressure, joint angle, pain

Question 8

Sensory receptors

Adaptation.

Answer 8

Some mechanoreceotirs adapt to maintained stimulus

Question 9

What senses vibration

Answer 9

Pacinion corpuscle

Question 10

What sense steady pressure and texture

Answer 10

Merkel receptors

Question 11

What responds to flutter and stroking movement

Answer 11

Meissners corpuscle

Question 12

What responds to noxious stimuli

Answer 12

Free nerve ending of NOCICEPTOR

Question 13

What carries signals to spinal cord

Answer 13

Sensory nerves

Question 14

What responds to skim stretch

Answer 14

Ruffini corpuscle

Question 15

Two point discrimination test depends on what 2 things

Answer 15

Receptive field size

Neuronal convergence

Question 16

What is adequate stimulus in cutaneous mechanoreceptoea and proprioceotis called

Answer 16

Membrane deformation

Question 17

Explain adaptation

Answer 17

Mechanoreceptors adapting to maintained stimulation and actio potential fires again once released

Question 18

What receptors do not adapt

Answer 18

Nocioceptors

Question 19

Properties of proprioception

Answer 19

1. Send sensory into spinal cord -> to brain control voluntary movement
2. Muscle spindles and golgi tendon organ provide sensory information to spinal cord neurones which generate spinal reflex movements
3. Provide sensory information to perceive limb and body position in space =kinaesthetia

Question 20

Where are most contactile muscles

Answer 20

In extrafusall fibres

Question 21

Where are soecialed muscle fibres that have own sensory and motor innervation

Answer 21

Intrafusal fibres

Question 22

What are intrafusal muscle fibres

Answer 22

Specialised

Question 23

What is convergence

Answer 23

Individual neurones come together

Question 24

What is divergence

Answer 24

Input from one neurone separated into multiple neurones

Question 25

What is function of Golgi tendon

Answer 25

Monitors muscle tension

Question 26

What is term for when muscles are kept same length

Answer 26

Isometric

Question 27

What is the function of gamma neurone

Answer 27

Fires -> exttafusal muscles contract/shorten

(Without, would stay same length, spindle becomes slack - no longer report muscle length to brain?

Question 28

What would happen if no gamma neurones

Answer 28

(Without, would stay same length, spindle becomes slack - no longer report muscle length to brain)

Question 29

What us inverse stretch reflex

Answer 29

1b afferent neurones from golgi tendon organs

Collapse resistance spring loaded knife protective mechanism

Question 30

Flexor withdrawal reflex with cross extension

Answer 30

Use from nocioceptor

Ipsilateral flexion antagonistic extensor inhbited