Unit 3a Flashcards
(60 cards)
You have stepped on a tack with your bare left foot. What type of receptors would detect the information related to pain you experience?
a)
Free nerve endings
b)
Pacinian corpuscles
c)
Meissner’s corpuscles
d)
Ruffini corpuscles
e)
Merkel receptors
Free nerve endings
You are snow-blowing your land lady’s driveway in exchange for a rent reduction. The ________ are the cutaneous sensory receptors that are most strongly stimulated by the vibration.
a)
Pacinian corpuscles
b)
Meissner’s corpuscles
c)
free nerve endings
d)
Merkel receptors
e)
muscle spindles
pacinian corpuscles
The cutaneous sensory receptors that would be used for reading *Braille would have _____ receptive fields, and ascend to the brain via the ________.
a)
small, dorsal columns
b)
small, spinothalamic tract
c)
small, corticospinal tract
d)
large, spinothalamic tract
e)
large, dorsal columns
small, dorsal columns
Information detected by fine touch receptors in the right hand travel via the ___________ to the ______________.
a)
spinothalamic tract, temporal lobe
b)
dorsal columns, primary motor cortex
c)
dorsal columns, somatosensory cortex
d)
dorsal columns, frontal lobe
e)
corticospinal tract, somatosensory cortex
dorsal , somatosensory
You are on vacation and you decide to take this yoga class on an active volcano because of the beautiful view! You are balancing on your RIGHT foot in tree pose and you begin to feel a rumbling. Choose the option that best describes the pathway taken by the sensory information that will be ultimately interpreted as vibration.
Dorsal root ->
- Dorsal columns
- Dorsal horn gray matter
- Synapse in medulla
- Left somatosensory cortex
- Right somatosensory cortex
- Left spinothalamic tract
- Right spinothalamic tract
- Synapse in thalamus
Question 5 options:
a)
2, 7, 3, 8, 5
b)
2, 6, 8, 4
c)
2, 6, 3, 8, 4
d)
2, 7, 8, 5
e)
2, 1, 3, 8, 4
e)
2, 1, 3, 8, 4
Afferent fibres that transmit information about length and tension of your leg muscles are likely to be…
Question 6 options:
a)
Large diameter and unmyelinated
b)
Small diameter and unmyelinated
c)
Small diameter and myelinated
d)
Large diameter and. myelinated
d
Muscle tension is monitored by…
a)
extrafusal muscle fibres
b)
tendons
c)
muscle spindles
d)
Golgi tendon organs
d)
Golgi tendon organs
Which neuron fires to cause contraction of intrafusal muscle fibres?
Question 8 options:
a)
Gamma motor neuron
b)
Muscle spindle afferent
c)
Golgi tendon organ afferent
d)
Alpha motor neuron
a)
Gamma motor neuron
Activation of gamma motor neurons…
Question 9 options:
a)
Tightens the intrafusal muscle fibres
b)
Inhibits muscle contraction in certain reflexes
c)
Typically occurs when the associated alpha motor neurons are activated
d)
a and c
e)
a, b and c
d
Rank the following senses with respect to the rate at which they carry information to the CNS (slowest to fastest).
Fast pain, Fine touch, Muscle length
Question 10 options:
a)
Fine touch, fast pain, muscle length
b)
Muscle length, fast pain, fine touch
c)
Muscle length, fine touch, fast pain
d)
Fine touch, muscle length, fast pain
e)
Fast pain, fine touch, muscle length
e
how does a stimulus dictate an ion channel
a stimulus can open or close ion channels in receptor cell membranes
how many neurons must there be in the pathway to the brain
there must be atleast two neurons on the way to the brain
what 2 information does not relay in the thalamus
olfactory and equlibrum dont relay in the thalamus
where does the olfactory info go ?
it goes directly to brain no relay
where does equilibrium info go ?
it goes mostly to cerebellum with minor input to thalamus
where is visceral (internal organs) sensory integration
it is mostly integrated in the brain and spine
in regards to visceral sensory info what is completely subconscious
blood pressure is completely subconscious
in regards to visceral sensory info what can be conscious
fullness and pain ; has to reach a certain point to feel it
are all APs identical
yes
what are the 4 things the CNS must be able to decode
- type of stimulus (modality)
- location
- intensity
4.duration
how is modality (type of stimulus) is decoded
its determined bye the type of neuron activation the where the pathway stops in the brain
what is label line coding ?
touch receptors project to a specific part of the cortex
how is location decoded?
is decoded by which receptive fields were activated and they project to a specific location in the somatosensory cortex
what are the two things that decode stimulus intensity?
- the number of receptors activiated
- the frequency of APs
