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In order for a plant to grow and survive it has to carry out
photosynthesis
Photosynthesis
the process by which plants and some other
organisms convert light energy into chemical energy in the
form of glucose
Photosynthesis word equation
carbon dioxide
+
water
---(with light energy)--->
glucose
+
oxygen
Photosynthesis symbol equation
6CO2
+
6H2O
→
C6H12O6
+
6O2
Body
mass
index
=
Weight
(
kg
)/
height
(
m2
)
Factors
affecting
metabolism
Age
Sex
Body size
/
weight
Stress
Pregnancy
Catabolism
the
breakdown
of
complex molecules
in living organisms to form
simpler
ones, together with the
release
of
energy
Anabolism
the
synthesis
of
complex
molecules
in living organisms from
simpler
ones
together
with the
storage
of
energy
Metabolism
the
chemical reactions
in the
body's cells
that change
food
into
energy.
metabolism
=
anabolism + catabolism
Aerobic Respiration
the process of
cellular respiration
that takes place in the presence of
oxygen gas
to produce
energy
from
food.
Anaerobic Respiration
a type of
cellular respiration
that occurs in the
absence
of
oxygen.
lactic acid
+
oxygen----
>
glucose
Lactic Acid
is
poisonous
to
muscles
it stops them
contracting
and
relaxing
they become
fatigued
Red
blood cells contain
haemoglobin.
transpiration
occurs when
plants
take up liquid
water
from the
soil
and release
water
vapor
into the
air
from their
leaves.
Photosynthesis is an
endothermic
reaction.
Photosynthesis takes place in the
chloroplast.
Factors
Affecting
Photosynthesis
Carbon
Dioxide
Concentration
Temperature
Chlorophyll
Concentration
Light
Intensity
High
chlorophyll concentration gives a
high
rate of
photosynthesis.
Increasing
the temperature
increases
the rate of photosynthesis
If the temperature is increased to above
45
degrees, the enzyme
denatures
and the
reaction
stops
Photosynthesis
converts
carbon
dioxide
and
water
into
oxygen
and
glucose.
Metabolic Reactions:
Converting
Glucose
Breaking
down
excess
proteins
Making
lipids
Making
amino acids
Glucose molecules
can be
joined together
to
produce starch
(in plants).
Homeostasis
Self-regulating
process by which a living organism can maintain
internal
stability while adjusting to changing
external
conditions.
Increase the rate of respiration
Increase
breathing
rate
Increased
heart
rate
Increase
in
breath volume
Blood vessels dilate
Oxygen debt
Refers to the
extra oxygen
that is need after exercise to
oxidise
lactic acid and get it out of
cells.
Repaying the debt
Blood
transports the
lactic acid
to the
liver
, where it reacts with
oxygen
to produce
carbon
dioxide
and
water.