Peripheral Nervous System Flashcards Preview

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Flashcards in Peripheral Nervous System Deck (33):
1

The body's ability to detect changes in the internal and external enviornments

Sensation

2

The conscious interpretation of stimuli

Perception

3

What are the structures specialized to respond to changes in the enviornment

Sensory Receptors

4

What are two classifications of receptors based on location

Exteroceptors and Interoceptors

5

Exteroceptors respond to stimuli occuring

on the outside of the body

6

Examples of extroceptors includes

touch, pressure, pain and temp receptors in the skin and special sense organs (e.g. eyes, ears)

7

Interoceptors are also known as

Visceroceptors

8

Interoceptors (visceroceptors) respond to stimuli

occuring in the inside of the body in the organs and blood vessels

9

What do Interoceptors detect

chemical changes,stretch, pain and temp

10

This is a specific kind of interoceptors

Proprioceptors

11

Proprioceptors respond to

internal stimuli caused by movement

12

Proprioceptors can be found

in muscles, tendons, ligaments, and connective tissue coverings of muscles and bones

13

Function of the proprioceptors is to help

the brain know the location of the body parts

14

Classification of receptors based on stimulus detected

~ Chemoreceptors- respond to chemical changes
~ Nociceptors- pain receptors
~ Thermoreceptors- respond to temp changes
~ Mechanoreceptors- detect touch, pressure, vibrations, and stretch
~ Photoreceptors-respond to light energy

15

Types of chemoreceptors

Taste, smell, and blood chemicals

16

Why do we have nociceptors

to respond to potentially damaging stimuli

17

Photoreceptors are found mainly

in the eyes

18

Free dendritic endings are

naked dendritic processes (no capsule)

19

Where can free dendritic endings be found and what do they respond to

nearly all body regions; mainly to pain, temp changes, but can act as mechanoreceptors

20

what are encapsulated dendritic endings

they have one or more terminal fibers enclosed in a connective tissue capsule

21

Encapsulated dendritic endings are mostly what kind of receptor based on stimulus detected

mechanoreceptors

22

What are some specific types of encapsulated dendritic endings

~Meissner's Corpuscle
~Krause's End Bulbs
~Pacinian Corpuscle
~Ruffini's Corpuscle
~Muscle Spindles
~Golgi Tendon Organs
~Joint Kinesthetic Receptors

23

What does the Meissner's Corpuscle detect and where is it found

light pressure, touch and low frequency vibrations; found in the skin (especially hairless areas)

24

What does Krause's end bulbs detect and where is it found

light pressure, touch, and low frequency vibrations; found in mucous membranes

25

What does the Pacinian Corpuscle detect and where is it found

deep pressure; located in the dermis and hypodermis

26

What does the Ruffini's Corpuscle detect

continuous pressure in the skin and joint capsules

27

What does the muscle spindles detect

the stretch of muscle fibers

28

What does he golgi tendon organs detect

the stretch of tendons

29

what are joint kinesthetic receptors

proprioceptors around synovial joints

30

Transduction

Stimulus is turned into an electrical impulse allowing it to be sent to brain

31

Receptor potentials are

similar to EPSPs; needs to be above threshold to cause an action potential

32

Generator Potentials are

receptor potential that get above threshold; causes action potential

33

A stimulus that is continuous causes less and less response by the receptors, thus the sensation goes away with time

Adaptation