PN Part 1

Question 1

PN is all nervous tissue outside–

Answer 1

The central nervous system

Question 2

Each nerve has —- nerve fibers (axons).

Answer 2

thousands

Question 3

Nerves are surrounded by—

Answer 3

connective features

Question 4

These are three types of nerves:

Answer 4

sensory, motor, mixed

Question 5

General reflex arc

Answer 5

receptors, integration, effectors

Question 6

Afferent neurons

Answer 6

input from receptor–> CNS

Question 7

Sensory receptors are what order?

Answer 7

First

Question 8

Mechanoreceptors respond to

Answer 8

mechanical forces (pressure, vibration, stretch)

Question 9

Thermoreceptors

Answer 9

respond to heat

Question 10

Photoreceptors

Answer 10

respond to light

Question 11

Chemoreceptors

Answer 11

responses to chemical changes (taste, smell)

Question 12

Nociceptors

Answer 12

responses to damaging stimuli (pain)

Question 13

Exteroceptors

Answer 13

sensitive to stimuli outside the body

Question 14

Interoceptors

Answer 14

sensitive to stimuli within the body

Question 15

Proprioceptors

Answer 15

monitor degree of stretch

Question 16

Free dendritic endings

Answer 16

Dendrites with small knob-like endings

Question 17

In thermoreceptors, cold receptors are — and hot receptors are —.

Answer 17

superficial, deep

Question 18

Encapsulated dendritic endings

Answer 18

One or more dendrite endings enclosed in a connective tissue capsule
– Mainly mechanoreceptors

Question 19

Perception

Answer 19

the conscious interpretation of
those stimuli

Question 20

sensory integration

Answer 20

comes from exteroceptors, proprioceptors, and interoceptors

Question 21

First order neuron goes:

Answer 21

sensation to CNS

Question 22

Second order neuron goes:

Answer 22

interneuron in CNS

Question 23

Third order neuron goes:

Answer 23

in thalamas

Question 24

Meissner’s (tactile) corpuscles

Answer 24

encapsulated, discriminate touch

Question 25

Pacinian (lamellated) corpuscles—

Answer 25

encap., deep pressure and vibration

Question 26

Ruffini endings—

Answer 26

encap., deep continuous pressure

Question 27

An example of complex receptors--

Answer 27

special sense ones, like eyes and ears

Question 28

Sensation

Answer 28

the awareness of changes in the internal and external environment

Question 29

Input is relayed toward the ____, but is ______ along the way

Answer 29

head, processed

Question 30

Receptor level of integration--

Answer 30

the sensor receptors

Question 31

The circuit level of integration--

Answer 31

ascending pathways

Question 32

Perceptual level of integration--

Answer 32

neuronal circuits in the cerebral cortex

Question 33

Receptors have specificity for _____.

Answer 33

stimulus energy

Question 34

When stimulus energy is converted into a graded potential called a receptor potential.... it is a

Answer 34

transduction

Question 35

General sense receptor: stimulus-> ___ -> ______

Answer 35

receptor/ potential in afferent neuron, action potential at first node of Ranvier, processing at receptor level

Question 36

In special sense organs: stimulus -> ____ -> ______ -> ______ -> _______

Answer 36

receptor potential in receptor cell, release of neurotransmitter, generator potential in first-order sensory neuron, action potentials (if threshold is reached)