L-24 Flashcards

1
Q

Name the 5 “special” senses

A
  • vision
  • hearing
  • balance
  • taste
  • smell
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2
Q

How many somatic senses are there?

A

4

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3
Q

Name the somatic senses:

A
  • mechanoreceptors
  • nociceptors
  • thermoreceptors
  • chemoreceptors
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4
Q

What can mechanoreceptors detect?

A
  • touch
  • pressure
  • vibration
  • proprioception
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5
Q

What is proprioception?

A

Sense of movement and location

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6
Q

What do nociceptors detect?

A
  • noxious stimuli ( painful/harmful)
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7
Q

What do thermoreceptors detect?

A

Temperature

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8
Q

What do chemoreceptors detect?

A
  • chemicals (eg blood gasses)
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9
Q

How are mechanoreceptors triggered?

A

Physical distortion opens ion channels to make a receptor potential

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10
Q

Name three types of mechanoreceptors:

A
  • proprioceptors
  • barioceptors
  • tactile receptors
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11
Q

Where would proprioceptors be found?

A
  • muscle spindles
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12
Q

Hat do baroreceptors detect?

A

Blood pressure

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13
Q

What do tactile receptors detect?

A
  • touch
  • pressure
  • vibration
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14
Q

What do myelinated free nerve endings in the skin usually detect?

A
  • thermoreceptors detect change in temp
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15
Q

What do thinly or unmyelinated nerve endings in the skin usually detect?

A
  • nociceptors

- detect mechanical, thermal, or chemical stimuli perceived as painful

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16
Q

What is a receptive field?

A

The receptive field is the nerve endings of any single receptor spread over a restricted area

17
Q

What is the difference in localisation provided by big receptive fields vs smaller ones?

A
  • big fields provide poor localisation

- small fields can detect very specific location

18
Q

Are phasic or tonic receptors faster adapting?

A

Phasic

19
Q

Are phasic or tonic receptors more superficial?

A

Phasic

20
Q

Are phasic or tonic receptors contantly active?

A

Tonic

21
Q

How do tonic receptors communicate a change in intensity of a stimulus?

A

Increased AP frequency until stimulus returns to normal

22
Q

How many types of information is encoded in sensory stimuli?

A

4

23
Q

Name the types of information coded in sensory stimuli:

A
  • modality
  • intensity
  • duration
  • location