respiration

Question 1

definition

Answer 1

Respiration is a series of reactions that are controlled by enzymes. You need to be able to state this in an exam!, Respiration is a chemical process that involves the breakdown of nutrient molecules (specifically glucose) in order to release the energy stored within the bonds of these molecules

Question 2

basics

Answer 2

Respiration can take place with oxygen (aerobically) or without oxygen (anaerobically). Much less energy is released for each glucose molecule broken down anaerobically compared to the energy released when it is broken down aerobically

Question 3

Humans need this energy to do the following things:

Answer 3

Contract muscle
Synthesise proteins
Cell division (to make new cells)
Grow
Enable active transport to take place
Allow nerve impulses to be generated
Maintain a constant internal body temperature

Question 4

Aerobic Respiration

Answer 4

the chemical reactions in cells that use oxygen to break down nutrient molecules to release energy

Question 5

word equation for Aerobic Respiration

Answer 5

glucose+oxygen=carbon cioxide+water

Question 6

Anaerobic respiration

Answer 6

does not require oxygen and is defined as the chemical reactions in cells that break down nutrient molecules to release energy without using oxygen

Question 7

word equation Anaerobic respiration

Answer 7

glucose - lactic acid

Question 8

word equation Anaerobic respiration in yeast and plants

Answer 8

glucose = alcohol+carbon dioxide

Question 9

why we continue to breath heavily and our heart rate remains high, we continue to breath heavily and our heart rate remains high

Answer 9

Cells excrete lactic acid into the blood. When blood passes through the liver, lactic acid is taken up into liver cells where it is oxidised, producing carbon dioxide and water, we need to transport the lactic acid from our muscles to the liver, and continue getting larger amounts of oxygen into the blood to oxidise the lactic acid
This is known as ‘repaying the oxygen debt’