Grade 11 Life Sciences
Cellular respiration:
Respiration is the biochemical process in which the cells of an organism obtain
energy by combining oxygen and glucose, resulting in the release of carbon dioxide,
water, and energy (ATP).
The mitochondria is the site of aerobic cellular respiration in cells.
Diagram of a mitochondrion
, Life processes that require energy:
Breathing
Growth (cell division)
Movement
Active transport
Maintaining a constant body temperature
Energy is the ability to do work. The energy can take a wide variety of forms - heat
(thermal), light (radiant), mechanical, electrical, chemical, and nuclear energy.
There are two types of energy - stored (potential) energy and working (kinetic)
energy.
For example, the food you eat contains chemical energy, and your body stores this
energy until you release it when you work or play.
Aerobic Cellular Respiration
Aerobic respiration is respiration in the presence of oxygen.
Cellular respiration occurs in all plant and animal cells, providing the cells with
energy necessary to carry out life processes. The purpose of cellular respiration is to
break down glucose to release the stored chemical potential energy.
Aerobic respiration can be written as the following word equation:
Glucose + oxygen → Water + carbon dioxide + ATP (energy)
Aerobic cellular respiration is made up of 3 stages:
1. Glycolysis
2. Kreb’s cycle
3. Oxidative phosphorylation
Cellular respiration:
Respiration is the biochemical process in which the cells of an organism obtain
energy by combining oxygen and glucose, resulting in the release of carbon dioxide,
water, and energy (ATP).
The mitochondria is the site of aerobic cellular respiration in cells.
Diagram of a mitochondrion
, Life processes that require energy:
Breathing
Growth (cell division)
Movement
Active transport
Maintaining a constant body temperature
Energy is the ability to do work. The energy can take a wide variety of forms - heat
(thermal), light (radiant), mechanical, electrical, chemical, and nuclear energy.
There are two types of energy - stored (potential) energy and working (kinetic)
energy.
For example, the food you eat contains chemical energy, and your body stores this
energy until you release it when you work or play.
Aerobic Cellular Respiration
Aerobic respiration is respiration in the presence of oxygen.
Cellular respiration occurs in all plant and animal cells, providing the cells with
energy necessary to carry out life processes. The purpose of cellular respiration is to
break down glucose to release the stored chemical potential energy.
Aerobic respiration can be written as the following word equation:
Glucose + oxygen → Water + carbon dioxide + ATP (energy)
Aerobic cellular respiration is made up of 3 stages:
1. Glycolysis
2. Kreb’s cycle
3. Oxidative phosphorylation
