i need the answers please help!

Part A
Which of the following was able to detect pressure?
Which of the following was able to detect pressure?
   free nerve ending
   the Pacinian corpuscle and the free nerve ending
   olfactory receptor
   Pacinian corpuscle
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Part B
Which of the following does NOT describe graded potentials?
Which of the following does NOT describe graded potentials?
   They vary with the intensity of the stimulus.
   They are local changes.
   They are always depolarizing.
   They are changes to the membrane potential.
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