Unit 2 test Flashcards

1
Q

touch receptors classification

Rapidly-adapting

A

Activated when a stimulus is first encountered, then falls silent when the stimulus remains present
detects movement

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2
Q

touch receptors classification

slowly-adapting

A

Keeps continously activated/responding to a continously/presenting stimulus
important for identifying shape & objects

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3
Q

touch receptor

Merkel’s disc

A

slowly-adapting
small receptive field
designed for shape, edges & texture on the read

example: feeling the ridges of a coin in your hand

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4
Q

Pacinian Corpuscle

A

rapidly-adapting
large receptive field
most efficient transmitting information on vibration

example: feeling a phone vibrating in your pocket

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4
Q

touch receptor

Meissner’s Corpuscle

A

rapidly-adapting
small receptive field
important for transmitting information about movement & vibration betweent the skin and another texture

example: feeling the ridges of a coin in your hand

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5
Q

Ruffini Corpuscles

A

slowly-adapting
large receptive
poorly understood, but important in detecting skin stretching

example: feeling tensio when gripping an object tightly

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6
Q

touch receptors

free-nerve endings

A

detects pain and temperature, touch, pressure, stretch, or nociception (danger)

example: feeling the shap pain of a paper cut or the burn of a hot stove

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7
Q

Top-down processing

A

responding to a stimulus with prior given knowledge

getting into a fight, but you’ve done martial arts

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8
Q

Bottom-up processing

A

responding to a stimulus with no prior knowledge

getting into a fight, but you have no idea how to fight

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9
Q

Distal stimulus

A

actual object in the enviornment being percieved

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10
Q

Proximal stimulus

A

the pattern of energy impinging on sensory receptors.

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11
Q

receptors

Phasic receptor

A

responds to changes

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12
Q

Tonic receptors

A

Maintain response over time

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13
Q

pain pathways

nociceptors

A

specialized to detect noxious stimuli (extreme pressure, hot or cold temp)

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14
Q

pain pathways

Anterolateral System

A

after noiceptors are activated, they will send a signal to the spinal cord, which will be transferred to the brain on pathways located on the spinal cord

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15
Q

pain pathways

Neuropathic Pain

A

chronic nerve pain that can happen if your nervous system malfunctions or gets damaged

16
Q

What are the six stages of brain development?

A
  1. neurogenesis
  2. cell migration
  3. differntiation
  4. synaptogenesis
  5. cell death (apoptosis)
  6. synaptic rearrangement
17
Q

brain development

Neurogenesis

A

step 1
formation of neurons through mitosis in the embryonic stages

18
Q

brain development

Cell migration

A

step two
neurons move to their destined locations (because of their gene expression)

19
Q

brain development

Cell differentiation

A

step 3
Neurons develop specialized functions

19
Q

brain development

Synaptogenesis

A

step 4
formation of synaptic connections

20
Q

brain development

Cell death

A

step 5
programmed elimination of excess neurons known an apoptosis.

21
Q

brain development

Synaptic rearrangement

A

refinement of synapses based on experience

22
Q

Stem cells

A

undifferentiated cells capable of developing into multiple cell types, including neurons

23
Q

Brain plasticity
(neuroplasticity)

A

the brain’s ability to change its structure and funcrion in response to experience and injury.

24
Q

hormone structures

peptide