CHAPTER 5
:
CELLULAR
RESPIRATI
ON
5.2 Aerobic Respiration
CHEMIOSMOSIS
Chemiosmosis is the movement of ions across
a semipermeable membrane bound structure, down
their electrochemical gradient. An important example
is the formation of adenosine triphosphate (ATP) by
the movement of hydrogen ions (H+) across
a membrane during cellular
respiration or photosynthesis.
Oxidative Phosphorylation refers to the
formation of ATP from ADP and Pi
using energy derived from the redox
reactions of an electron transport
chain in mitochondria
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TABLE OF CONTENTS
01
02
03
MARS
MERCURY
JUPITER
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SUMMARY OF
ATP
PRODUCTION
SHUTTLE SYSTEM IN LIVER AND SKELETAL
MUSCLE CELlS
The number of ATP produced
per molecule of glucose in
aerobic respiration depends
on the type of shuttle used
to transport electrons from
cytosolic NADH into the
mitochondrion
A SUMMARY OF ATP
PRODUCTION
Mercury is the closest planet to the Sun and
the smallest one in the Solar System—it’s
only a bit larger than the Moon. It was named
after a Roman god
01
COMPANY
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MERCURY
VENUS
Mercury is the closest planet to the
Sun and the smallest one in the
Solar System
Venus has a beautiful name and is
the second planet from the Sun. It’s
terribly hot
RESPIRATORY INHIBITORS
CYANIDE
CARBON
MONOXIDE
CYANIDE
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•
•
Cyanide (CN-) is a non competitive inhibitor
It binds strongly to the ferric Fe3+
component (hemecopper binuclear centre )
of the cytochrome a3 present in the
cytochrome oxidase system of
mitochondrion
Cytochrome a3 is at the end of the electron
transport chain. Cyanide inhibits the
terminal transfer of electrons to oxygen,
preventing oxygen from being utilised
This blocks the flow of electrons along the
electron transport chain
CARBON MONOXIDE
Carbon monoxide has high affinity for
haemoglobin forming
carboxyhaemoglobin (HbCO). It binds
tightly with haemoglobin and prevents
oxygen from binding with haemoglobin.
This reduces the oxygen- carrying
capacity of the blood leading to hypoxia.
LIPIDS AND PROTEIN AS
ALTERNATIVE ENERGY
SOURCE
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Venus has a beautiful
name, but it’s terribly
Mercury is the closest
planet to the Sun
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