ASU BIO 100 EXAM 3 QUESTIONS & ANSWERS.

ASU
BIO
100
EXAM
3
QUESTIONS
&
ANSWERS
Explain
the
functions
of
each
system
of
the
body:
Digestive
-
CORRECT
ANSWER-Mechanical
and
chemical
breakdown/digestion
of
food.
Absorption
of
nutrients.
Undigested
waste
product
that
is
eliminated.
Explain
the
functions
of
each
system
of
the
body:
Cardiovascular
(respiratory
and
circulatory)
-
CORRECT
ANSWER-Transportation
(blood
delivers
oxygen
and
nutrients),
regulation
of
body
temperature,
and
immunity
Explain
the
functions
of
each
system
of
the
body:
Immune
-
CORRECT
ANSWER-Battle
infection,
maintain
homeostasis
by
eliminating
damaged
cells,
protects
the
body
against
foreign
organisms.
Explain
the
functions
of
each
system
of
the
body:
Skeletal
-
CORRECT
ANSWER-support,
movement,
storage
of
minerals
(bone
marrow)
blood
cell
formation
Explain
the
functions
of
each
system
of
the
body:
muscular
-
CORRECT
ANSWER-movement,
maintenance
of
body
posture,
production
of
heat,
contraction
of
the
heart,
blood
pressure
maintenance,
intestinal
movement
(elimination
of
feces)
Explain
the
functions
of
each
system
of
the
body:
Endocrine
-
CORRECT
ANSWER-Communication,
integration,
and
control
(hormonally)
Explain
the
functions
of
each
system
of
the
body:
Reproductive
-
CORRECT
ANSWER-ensures
survival
of
the
human
race
Explain
the
functions
of
each
system
of
the
body:
Nervous
-
CORRECT
ANSWER-Communication,
integration,
control,
recognition
of
sensory
stimuli
(CNS
&
PNS)
Compare
and
contrast
how
positive
and
negative
feedback
mechanisms
are
used
to
maintain
homeostasis.
Use
these
concepts
to
describe:
The maintenance
of
blood
glucose
levels:
-
CORRECT
ANSWER-The
control
of
blood
sugar
(glucose)
by
insulin
is
another
good
example
of
a
negative
feedback
mechanism.
When
blood
sugar
rises,
receptors
in
the
body
sense
a
change.
In
turn,
the
control
center
(pancreas)
secretes
insulin
into
the
blood
effectively
lowering
blood
sugar
levels.
Once
blood
sugar
levels
reach
homeostasis,
the
pancreas
stops
releasing
insulin.
Compare
and
contrast
how
positive
and
negative
feedback
mechanisms
are
used
to
maintain
homeostasis.
Use
these
concepts
to
describe:
The
release
of
platelets
to
form
blood
clots:
-
CORRECT
ANSWER-once
a
vessel
is
damaged,
platelets
start
to
cling
to
the
injured
site
and
release
chemicals
that
attract
more
platelets.
The
platelets
continue
to
pile
up
and
release
chemicals
until
a
clot
is
formed.
What
does
it
mean
if
an
organism
is
an
ectotherm?
-
CORRECT
ANSWER-depend
mainly
on
external
heat
sources
-
their
body
temperature
changes
with
the
temperature
of
the
environment
(reptiles,
snakes,
lizards)
What
does
it
mean
if
an
organism
is
an
Endotherm?
-
CORRECT
ANSWER-generate
most
of
the
heat
they
need
internally
(mammals/humans/dogs)
Herbivorous
mammals
tend
to
have
extremely
long
digestive
systems,
especially
the
intestines;
omnivores
have
intermediate
length
intestines;
and
carnivores
have
extremely
short
intestines.
What
might
be
a
logical
explanation
for
this
pattern?
-
CORRECT
ANSWER-Plants
are
hard
to
break
down
and
need
more
time
to
get
nutrients.
Why
do
strict
vegetarians
(vegans)
have
to
be
more
careful
of
their
choices
of
food
than
do
vegetarians
that
also
eat
cheese,
eggs,
and
dairy
products?
-
CORRECT
ANSWER-Because
they
aren't
getting
the
vitamins
and
amino
acids
the
body
requires
to
function
properly
How
do
vaccines
work?
-
CORRECT
ANSWER-The
body
will
produce
antibodies
against
the
vaccine
so
when
you
have
the
real
thing
your
body
will
be
prepared.
You
may
not
even
get
sick.