Respiration

Question 1

All living things respire, its how energy is transferred from food to cells.

Define respiration

Is respiration exo or endothermic ?

Answer 1

Process of transferring energy from the breakdown on glucose to every cell in the body

Exo = transfers energy to environment

Question 2

Three example of how organisms use energy transferred by respiration

Answer 2

1) To build large molecules from smaller ones
2) in animals, allows muscles to contract
3) in mammals and birds, energy used to keep body temp steady in colder surroundings

Question 3

In a cell ..

Answer 3

there are lots of chemical reactions happening all the time, which are controlled by enzymes.
Many of these reactions are linked together to form bigger reactions.

Reactant -> enzyme = product -> enzyme = product

Question 4

in some of these reactions, larger molecules are made from small ones.
EXAMPLE

Answer 4

1) small glucose molecules joined together in reactions to form starch, glycogen and cellulose
2) lipid molecule each made from one molecule of glycerol and 3 fatty acids
3) glucose combined with nitrate ions to make amino acids which then make proteins

Question 5

in other reactions, larger molecules are made from small ones.

Example

Answer 5

1) Glucose broken down in respiration, respiration transfers energy to power all reactions in the body that make molecules
2) Excess protein is broken down in a reaction to produce urea . Urea is then excreted in urine

Question 6

What is respiration ?

Answer 6

sum of all reactions that happen in a cell or body