Bios 252 Exam 2 (Weeks 3 &4) with correct detailed answers.

Bios 252 Exam 2 (Weeks 3 &4) with correct
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detailed answers |




regions |of |the |spinal |cord |- |VERIFIED |ANSWER✔✔-cervical, |thoracic, |lumbar, |sacral



ulnar |nerve |- |VERIFIED |ANSWER✔✔-nerve |to |upper |limbs



sacral |plexus |- |VERIFIED |ANSWER✔✔-nerve |plexus |associated |with |the |lower |lumbar |and |pelvic |
region



conus |medullaris |- |VERIFIED |ANSWER✔✔-cord |tapers |to |a |point |inferior |to |lumbosacral |enlargement



cauda |equina |- |VERIFIED |ANSWER✔✔-bundle |of |nerve |roots |that |occupy |the |vertebral |canal |from |L2 |
to |S5



dura |mater |- |VERIFIED |ANSWER✔✔-thick, |outermost |layer |of |the |meninges |surrounding |and |
protecting |the |brain |and |spinal |cord



arachnoid |mater |- |VERIFIED |ANSWER✔✔-weblike |middle |layer |of |the |three |meninges



pia |mater |- |VERIFIED |ANSWER✔✔-the |delicate |innermost |membrane |enveloping |the |brain |and |spinal |
cord.



Gray |matter |contains |- |VERIFIED |ANSWER✔✔-cell |bodies



white |matter |contains |- |VERIFIED |ANSWER✔✔-axons |and |myelin



gray |matter |function |- |VERIFIED |ANSWER✔✔-Site |of |information |processing, |synaptic |integration

, white |matter |function |- |VERIFIED |ANSWER✔✔-carry |signals |from |one |part |of |the |CNS |to |another



ascending |tracts |- |VERIFIED |ANSWER✔✔-carry |sensory |information |to |the |brain



desceding |tracts |- |VERIFIED |ANSWER✔✔-carry |motor |information |down |to |effectors



types |of |neurons |involved |with |ascending |tracts |- |VERIFIED |ANSWER✔✔-first |order, |second |order, |
third |order



ascending |tracts |pathways |- |VERIFIED |ANSWER✔✔-spinocerebellar, |spinothalamic, |dorsal |column



descending |tracts |- |VERIFIED |ANSWER✔✔-carry |motor |commands |to |spinal |cord



types |of |neurons |involved |in |descending |tracts |- |VERIFIED |ANSWER✔✔-upper |motor |and |lower |motor
|neuron




descending |tract |pathways |- |VERIFIED |ANSWER✔✔-direct |to |skeletal |muscle, |indirect |to
|cardiac/smooth |muscle




Pathways |of |a |somatic |reflex |arc |- |VERIFIED |ANSWER✔✔-somatic |receptors, |afferent |nerve |fibers, |
integrating |center, |efferent |nerve |fibers, |effectors



stretch |reflex |- |VERIFIED |ANSWER✔✔-when |a |muscle |is |stretched, |it |"fights |back" |and |contracts



crossed-extension |reflex |- |VERIFIED |ANSWER✔✔-contraction |of |extensor |muscles |in |limb |opposite |of |
the |one |that |is |withdrawn; |Maintains |balance |by |extending |other |leg



flexor |reflex |- |VERIFIED |ANSWER✔✔-moves |a |limb |away |from |a |painful |stimulus