Respiratipon Flashcards
What is respiration
- the process which leads to and includes the chemical breakdown of materials to provide energy for life
What is respiration too
The oxidation of food substances with the controlled release of energy in living cells
Where does it take place
Mitochondria of cells
The more energy a cell needs..
The more mitochondria it has
E.g. Muscle cells , sperm cells, cells covering villi of small intestine
What molecules are energy stored on
Adenosine tri phosphate (ATP)
When needed, ATP
Is broken down into adenosine di phosphate and energy is realised
How is energy used
- Synthesis of protein building materials enzymes glycogen fats hormones
- Chemical work - transmission of nerve impulses
- Mechanical work- heart muscles, contraction of skeletal muscles
- Growth and repair
- Thermoregulation
What is aerobic respiration
The breakdown of food substances in the presence of oxygen with the release of a
large amount of energy
Chemical equation of aerobic respiration
C6H12O6+ 6O2 –> 6CO2 +6H2O +38 ATP
What is anaerobic respiration
The breakdown of food subtances with the release of a comparatively small amount of energy in the absence of oxygen
Vertebrate muscles
- Since there is insufficient oxygen to meet the demands in vigorous muscle contractions, lactic acid slowly builds up in the muscles
What is tissue respiration
The oxidation of organic food molecules with the liberation of energy, carbon dioxide and water within the living cells
What is
External respiration
The process of the transfer of oxygen from the surrounding air or water to the cells and the transfer of the products of respiration (carbon dioxide and water) from the cells back to the surrounding medium, includes breathing and gas exchange
What is Breathing
Respiratory movements which bring about an exchange of gases between an organism and it’s surroundings ie. gaseous exchange. It ventilated the lungs and is needed to maintain high concentration gradients in the alveoli.
