Respiratory
Centers
Medulla
oblongata
Has
inspiratory
and
expiratory
control
centers
Pons
Apneustic
center
and
pneumotaxic
center
.
Limits
the
duration
of
inspiration
,
but
____________________
resp
rate
.
Chemical
control
of
Respiration
:
Via
chemoreceptors
in
chemosensitive
areas
in
M
.
O
.
,
which
are
excited
by
____________________
____________________
and
hydrogen
and
the
peripheral
chemoreceptors
in
the
cartid
and
aortic
bodies
which
are
particularly
sensitive
to
____________________
.
Respiration
is
stimulated
by
an
increase
in
____________________
,
H
.
,
high
PO2
.
Respiration
is
inhibited
by
a
decrease
in
____________________
,
H
,
high
PO2
.
In
metabolic
alkalosis
(
vomiting
)
the
hydrogen
concentration
is
lowered
,
respiration
is
inhibited
which
causes
an
increase
in
the
PCO2
and
thus
increases
the
blood
____________________
concentration
.
Hyperventilation
causes
respiratory
____________________
:
low
hydrogen
concentration
since
there
is
a
low
PCO2
.
Rebreathing
____________________
air
increases
PCO2
and
returns
the
blood
Ph
to
normal
.
(
PAPER
BAG
)
Respiratory
acidosis
Low
pH
of
blood
due
to
____________________
CO2
not
blown
off
CO2
rises
,
ph
goes
down
Breathing
fast
-
-
-
PCO2
goes
down
-
-
-
-
Hydrogen
goes
down
-
-
-
____________________
Breathing
slow
-
-
-
PCO2
goes
UP
-
-
-
-
-
-
-
Hydrogen
goes
UP
-
-
-
-
-
____________________