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HIGHER BIOLOGY
UNIT 2
2.3 - metabolic rate
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Eilidh Robertson
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Cards (14)
define metabolic rate?
the quantity of
energy consumed
per
unit
of
time
how can metabolic rate be calculated?
oxygen consumption
per
minute
carbon dioxide
produced per
minute
heat
produced per
minute
What types of apparatus can be used to measure metabolic rate?
respirometer
oxygen probe
carbon dioxide probe
calorimeter
why is using a respirometer an indirect measurement of oxygen consumption?
oxygen
inhaled but
carbon dioxide
not given out as
absorbed
by
chemical
in
test tube
volume
of
gas
in container is
lower
drawing more
air
/
liquid
up tube
general units for metabolic rate?
ml
/
min
/
kg
how does a calorimeter measure metabolic rate?
measures the
change
in
temperature
an increased metabolism requires an increased need for
oxygen
for
respiration
define complete circulatory system?
2 atria
and
2 ventricles
oxygenated and deoxygenated blood
do
not
mix
within the heart
what does an incomplete circulatory system consist of?
2 atria
and
1 ventricle
oxygenated and deoxygenated blood
mixes
complete circulatory systems are more
efficient
than incomplete circulatory systems
Describe the circulatory system in mammals and birds?
double
complete circulatory system
2 atria
,
2 ventricles
no mixing
of blood
describe the circulatory system in amphibians and reptiles?
double incomplete
circulatory system
2 atria
,
1 ventricle
mixing of
blood
describe the circulatory system in fish?
single incomplete
circulatory system
1 atrium
,
1 ventricle
blood flows in a
single circuit
3 abiotic factors that affect the ability of an organism to maintain its metabolic rate?
temperature
pH
salinity