Summary
Summary Topic 7 Breathing Rate
Edexcel Biology Topic 7 Breathing Rate,
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Breathing Rateblood (O2 concentration
CO2 + H20 >
carbonic acid
↳ low
S.I units pH
Dissassociates to .
protons
-
get
Homeostasis
·
rate
(On
+
concentration
heart rate
.
in blood controlled by breathing
Ventilation muss flow of gases
blood
in he
in the
lang, as
capillaries
↓
medulla
-chemoreceptors in aortic arch , Carotid
artery and
oblongate
-increase blood (O2 concentration detects
change
-
a
potential propagated
through
-action Ses,
to in medulla a
neurone
synapses
ventilation curre (VC)
-sympathetic nerve
e moter neuroves
(externall muscles and
-Effectors
diaphram
are intercostal
your
Inspiration -
Contraction of external intercostal muscles
and diaphram which moves down
Stretch
impulses
receptors
to VC
in bronchides send
inhibitery
Expiratio - > muscles relax volume decreases
increasing
air pressure so air
flows
Out
of lungs
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