Exam 2 2010 Key

Exam 2 2010 Key - Exam
#2
Key
 Multiple
Choice
 1...

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Unformatted text preview: Exam
#2
Key
 Multiple
Choice
 1) d
 2) a
 3) c
 4) e
 5) b
 6) a
 7) b
 8) e
 9) a
 10)b
 11)b
 12)c
 13)c
 Short
Answer:
 14)b
 15)a
 16)b
 17)a
 18)c
 19)c
 20)d
 21)b
 22)e
 23)e
 24)b
 25)b
 26)c
 27)b
 28)c
 29)a
 30)d
 31)a
 32)a
 33)b
 34)b
 35)b
 36)c
 37)d
 38)c
 39)e
 40)a
 41)d
 42)b
 43)f
 44)b
 45)d
 46)a
 47)f
 48)c
 49)e
 50)b
 1) Starting
in
the
upper
left
corner
c
–
cornea,
a
–
anterior
chamber,
j
–
sclera,
b
 –
choroid,
h
–
retina,
d
–
fovea
centralis,
g
–
optic
nerve,
k
–
vitreous
humor,
f
 –
lens,
e
–
iris,
i
–
pupil.

So
c,
a,
j,
b,
h,
d,
g,
k,
f,
e,
h,
i
 2) Skull
–
bone
absorbs
shocks
to
the
brain
and
protects
it;
meninges
–
act
as
a
 physical
layer
of
protection
and
helps
prevent
excessive
movement
of
the
 brain;
Blood
–
brain
barrier
–
prevents
non‐lipid
soluble
substances
from
 entering
the
brain
(keeps
out
pathogens);
Cerebrospinal
Fluid
–
cushions
the
 brain
 3) A)
The
reflex
would
not
function
because
the
signal
would
not
reach
the
 motor
neuron
 
 B)

Yes
 
 C)

Yes
 
 
 D)

Increase
–
because
it
would
now
have
to
be
pulled
of
via
a
voluntary
 motor
command
which
is
slower
than
a
reflex.
 4) As
the
action
potential
travels
down
to
the
axon
terminal
it
opens
up
voltage
 gated
calcium
channels.

Calcium
flows
into
the
axonal
terminal
and
causes
 neurotransmitter
vesicles
to
fuse
with
the
presynaptic
cell
and
 neurotransmitter
is
released
into
the
synaptic
cleft.

The
neurotransmitter
 diffuses
across
the
synaptic
cleft,
binds
to
the
post‐synaptic
cell
and
causes
 the
opening
of
channels
which
can
cause
an
action
potential
in
a
post‐ synaptic
cell.

If
you
block
calcium
channels
on
the
cell
then
neurotransmitter
 will
not
be
released
and
action
potentials
cannot
occur.
 5) 
 Spatial
Summation
–
 Temporal
Summation
‐
 
 
 Three
points
for
each
graph.

Minus
0.5
points
per
axis
not
labeled.
 
 6) 0.25
points
per
box.

If
you
answer
one
of
the
other
and
it
is
both
then
 subtract
0.125.
 Neurotransmitter

 Inhibitory
or
 Excitatory
 Dopamine
 Excitatory
&
 Inhibitory
 Both
 Acetylcholine
 Mechanism
of
 Action
(Direct
or
 Indirect)
 Indirect
 Chemical
 Classification
 Biogenic
Amine
 Both
 Acetylcholine
 Norepinephrine
 Both
 Indirect
 Biogenic
Amine
 ATP
 Both
 Both
 ATP
 Glutamate
 Excitatory
 Direct
 Amino
Acid
 Somatostatin
 Inhibitory
 Indirect
 Peptide
 Carbon
Monoxide
 Excitatory
 Indirect
 Dissolved
Gas
 
 7) 0.5
point
for
each
box
 Division
 Origin
of
Fibers
 Length
of
Fibers
 Location
of
 Ganglia
 Close
to
spinal
 cord
 Sympathetic
 Thoracolumbar
 region
of
spinal
 cord
 Parasympathetic
 Brain
and
sacral
 spinal
cord
 Short
 preganglionic
and
 long
post
 ganglionic
 Long
preganglionic
 In
or
near
the
 and
short
 visceral
effector
 postganglionic
 
 8) Mechanoreceptor
–
respond
to
mechanical
stimuli
(many
answers
to
specific
 type
–
see
notes);
Thermoreceptor
–
respond
to
changes
in
temperature
(free
 dendritic
nerve
endings);
Photoreceptors
–
respond
to
light
(rods
or
cones);
 Chemoreceptors
–
respond
to
chemicals
in
solution
(taste
buds
or
olfactory
 receptor
cells);
Nociceptors
–
respond
to
pain
(free
dendritic
nerve
endings)
 9) A)

Parasympathetic
nervous
system
–
the
parasympathetic
nervous
system
 decreases
heart
rate
and
stimulates
the
digestive
system

B)

Vagus
nerve
–
 Vagus
nerve
innervates
the
throat,
heart
and
digestive
system
C)

Yes
–
the
 sympathetic
nervous
system
is
organized
such
that
it
is
activated
as
a
unit
 due
to
extensive
branching
of
the
pre‐ganglionic
fibers/
 ...
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This note was uploaded on 02/09/2012 for the course BIO 102 taught by Professor William during the Spring '11 term at Harvard.

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