Nurs 5357 Neurobiology Exam 2 Final Paper Solved Questions With Accurate Answers Study Pack

NURS 5357 NEUROBIOLOGY EXAM 2 FINAL
PAPER SOLVED QUESTIONS WITH
ACCURATE ANSWERS STUDY PACK

●● types of somatosensory receptors
Answer: mechanoreceptors: skin (extero) and intero (muscle/bone)
thermoreceptors: temp
nocireceptors: extreme sensation


●● exteroreceptors
Answer: merkel, messiner, ruffini, pacinian


●● spatial resolution of sensory resolution
Answer: high: m/m
low: pacinian, ruffini


●● slow vs rapid adapting receptors
Answer: rapid: messiner, pacinian
slow: merkel, ruffini


●● slow adapting

,Answer: merkel, ruffini: magnitude and duration of pressure


●● fast adapting
Answer: meissiner, ruffini: magnitude and change


●● propioreceptor - muscle spindle
Answer: intrafusal muscle fiber, sense rate of muscle length change


●● propriorceptor - GTO
Answer: tendon/muscle junction, sense rate of contraction


●● proprioreceptors: bone joint
Answer: bone joints, bone joint movement


●● sensory transduction
Answer: 1. detection of stimuli from receptors
2. stimulus sensitive cation channels
3. voltage gated Na channels
4. AP propagates


●● 2 pathways of somatosensory signals
Answer: dorsal medial - from spinal sensory neurons to brain

, trigeminothalamic - from cranial sensory neurons to brain


●● dorsal column (spinal)
Answer: mechano/proprioreceptors -> dorsal root ganglion -> medulla
(CROSSES) -> thalamus -> somatosensory


●● trigeminothalamic (cranial)
Answer: mechano/proprioreceptors -> trigeminal ganglion -> medulla
(CROSSES) -> thalamus -> somatosensory


●● contralateral transmission
Answer: 1. mechano: trigeminothalamic, dorsal medial (cross in
thalamus)
2. thermo/noci: anterolateral (cross in spine)
3. nasal retinal field (cross at optic chiasm)
4. upper motor neuron


●● ipsilateral transmission
Answer: 1. temporal retinal field
2. 10% of auditory
5. lower motor neuron


●● bilateral transmission