Lecture 6 ( Graded Potentials)

Question 1

Neurons

Answer 1

• input region - dendrites
• cell body
• output = axon

Question 2

Glia

Answer 2

• support cells nervous system
• astrocytes - maintain interstitial fluid
• Oligodendrocytes - myelin CNS
• Schwann Cells - myelin PNS

Question 3

Receptor Potential

Answer 3

• stimulus - > open mech gated ion channel/ temp gated ion channel
  (located in sens dendrite of afferent nuerons)
• graded potential

Question 4

Sensory Dendrites

Answer 4

• of somatic sensory neurons/ afferent neurons
• found in skin
• Meisner’s Corpuscle - embedded in connective tissue structure

Question 5

Graded Potential

Answer 5

• Receptor Potential
• Postsynaptic Potential
• amp membrane potent changes with size of stim
• causes local current flow spreads
• only conduct few mm
• generate action potential

Question 6

Postsynaptic Potential

Answer 6

• graded potential
• fast, slow, excite, inhib, can add/sum

Question 7

Action Potential

Answer 7

• can conduct long dist. w/o losing strength