Physiology

Topics: Nervous system, Action potential, Neuron Pages: 97 (2932 words) Published: July 23, 2013
NAME
 ________________________________________
 
  HUMAN
 PHYSIOLOGY
 BMS
 108
  First
 Midterm
 –
 Summer
 2013
  DR.
 BARRY
 D.
 TANOWITZ
  1.
 Put
 your
 name
 at
 the
 top
 and
 on
 your
 Scantron.
  2.
 Answers
 for
 questions
 1-­‐
 50
 will
 be
 placed
 on
 a
 Scantron
 (Green
 strip,
 100
 questions)
 –
 all
 questions
 1
 point
 each.
 
  3.
 Answers
 for
 questions
 51-­‐71
 will
 be
 entered
 on
 this
 exam
 below
 –
 points
 are
 variable.
 
  1.
 All
 of
 the
 following
 are
 consistent
 components
 of
 a
 basic
 di-­‐synaptic
 reflex
 arc
 except…
 
  a.
 interneuron
  d.
 brain
 
  b.
 afferent
 neuron
  e.
 effector
 
  c.
 receptor
 
  2.
 All
 of
 the
 following
 are
 features
 of
 graded
 potentials
 except…
 
  a.
 decremental
  d.
 occur
 at
 dendrites
 
  b.
 sub-­‐threshold
  e.
 can
 be
 inhibitory
 
  c.
 non-­‐decremental
 
  Identify
 the
 following
 features
 of
 the
 action
 potential
 for
 a
 typical
 neuron.
 Be
 aware
 of
 the
 sequence
 of
 events.
  C3.
 What
 does
 the
 value
 at
 #1
 indicate?
  B4.
 What
 events
 are
 occurring
 during
 #5?
  A5.
 What
 events
 are
 occurring
 during
 #3?
  D6.
 What
 does
 the
 value
 at
 #2
 indicate?
  +
  +
  a.
 Na channels
 rapidly
 open,
 and
 K
 channels
 are
 closed
  +
  +
  b.
 Na channels
 are
 closed,
 and
 K
 channels
 are
 open
 
  c.
 the
 cell
 is
 at
 its
 resting
 membrane
 potential
 
  d.
 the
 threshold
 potential
 has
 been
 reached
 
  e.
 the
 cell
 has
 repolarized
 
 
 
 
  Mark
 ‘a’
 for
 TRUE
 and
 ‘b’
 for
 FALSE
 for
 the
 following
 questions
  7.
 The
 perimysium
 surrounds
 each
 individual
 muscle
 fiber.
 (This
 probably
 fits
 better
 with
 the
 next
 exam,
 so
 I
 will
 give
 everyone
 credit)
  A8.
 The
 rate
 of
 diffusion
 increases
 as
 the
 concentration
 gradient
 increases.
  B9.
 Non-­‐myelinated
 neurons
 use
 saltatory
 conduction
 to
 conduct
 nerve
 impulses
 along
 the
 axon.
  A10.
 ECF
 is
 contained
 into
 two
 compartments
 known
 as
 the
 interstitial
 fluid
 and
 the
 blood
 plasma.
  B11.
 The
 semicircular
 canal
 is
 the
 portion
 of
 the
 middle
 ear
 that
 is
 responsible
 for
 detection
 of
 sound
 waves.
  B12.
 Cells
 become
 more
 positive
 during
 hyperpolarization.
  A13.
 All
 neurotransmitters
 work
 at
 the
 post-­‐synaptic
 membrane.
  A14.
 Myelinated
 axons
 have
 nerve
 impulses
 that
 travel
 faster
 than
 in
 unmyelinated
 axons.
 
  15.
 All
 of
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