Cellular Respiration

Mrs. Jackie

Cellular Respiration

RespirationDefine as a process in which energy is

released from food to form ATP with the combination of oxygen

Purpose of energy ATPActive transportCell division and growthMuscle cells- contractionNerve cells- send impulsesMaintaining heat

Types of respirationAerobic respiration

Release energy from food by combining it with oxygen

Anaerobic respirationRelease energy from food without using

oxygenGlucosealcohol + carbon dioxide +ATPSome cells in your body: muscle cells

undergo anaerobic respirationGlucose lactic acid + glycerol.

ClassworkIn your notebook make a table comparing

aerobic and anaerobic respiration in terms of raw matter used and products.

Aerobic respirationFood molecules are combined with

oxygen= oxidationAll food molecules contain carbon,

hydrogen and oxygen atoms.Oxidation converts carbon to carbon

dioxide and the hydrogen to water. 2830 kj is the amount of energy you would

get by completely oxidizing 180 grams of glucose to carbon dioxide and water.

Steps in aerobic respirationMolecule of glucose is attack by an enzyme

that breaks the glucose molecule into two 3 carbon molecules

This breakdown sets free energyEach 3 carbon molecule is broken down to

carbon dioxideMore energy is released and CO2 is

producedThe glucose has been completely oxidized

to carbon dioxide (and water) and all the energy is released.

MitochondriaThis is where

aerobic respiration takes place.

IT generates ATP

Anaerobic respirationMeans in the absence of oxygenCommon example

Yeast in sugar solution to produced alcoholThe sugar is not completely oxidized to carbon

dioxide and water but converted to carbon dioxide and alcohol.

This process is called FERMENTATION

FermentationGeneral equation C6H12O62C2H5OH +2CO2

+118kjBrewing and break making depend on

anaerobic respiration

Anaerobic respiration in musclesPyruvic acid is producedGeneral equation

enzymes enzymes and oxygen Glucosepyruvic acidCO2 + H2O aerobic stage anaerobic state

During exercise pyruvic acid build up in a muscle faster than it can be oxidized and then is turn into lactic acid and removed in the bloodstream.

After exercise stop oxygen is still needed, the build up of lactic acid is called an oxygen debt.

MetabolismAll chemical changes taking place inside a cell or a

living organismsBasal metabolism- minimal energy needed simply

to keep and organism alive without movement or growth.Maintain breathing, heart beat, digestion and

excretionCatabolism- processes which break substances

downanabolism.- processes which build up substancesAnabolic steroids

Use by athlete to reduce the rate of protein breakdown and enhance the buildup of another

One world and Health and Social Education: AssignmentSteroid are chemicals which effects are

complicated and not fully understood.This homework is to be done computer Typed

double space and letter12. If handwritten be sure to write clearly.

Look for information on the side effects of steroidsHow the use of steroids contravenes athletics

codes?Are there any positive uses for steroid? Which are

those?How the use of steroids may influence a person

social, physical and mental wellbeing?

HWIf in one word you had to say what respiration was

about, which word would your choose from this list: breathing, energy, oxygen, cells, food?

IN which part of living organism respiration takes place?What are the main differences between aerobic and

anaerobic respiration?What is the difference between aerobic and anaerobic

respiration in the amount of energy released from one molecule of glucose?

Victims of drowning who have stopped breathing are sometimes revived by a process called artificial respiration. Why would a biologist object to the use of this expreession?