Respiration Part 1

Learning Objectives Learn about why animals and plants need energy. Understand what respiration is. Understand what respiratory quotients (RQs) are.

Success Criteria I can state the word and symbol equation for respiration. I can list what energy released from respiration is used for. I can explain what the role of ATP is.

Starter Watch your teacher demonstrate the ‘screaming jelly baby’. This demo shows how much energy is stored in a single sweet! In what process is the energy released in your body?

Energy & Respiration Plants and animals need energy to carry out life processes such as movement. To release energy, animals and plants need glucose and oxygen. Releasing energy in cells is called RESPIRATION. These people are able to run because energy is being released from their food. This happens in their cells (inside mitochondria).

Aerobic Respiration Aerobic respiration uses oxygen to release energy. The word equation for aerobic respiration is: glucose + oxygen  carbon dioxide + water The symbol equation for aerobic respiration is: C 6 H 12 O 6 + 6O 2  6CO 2 + 6H 2 O Aerobic respiration is the way we release energy when we are sleeping or are at rest

Task 1.Which gas is used in aerobic respiration? 2.Which gas is produced during aerobic respiration? 3.Write down one life process that needs energy. 4.The reactions involved in respiration require biological catalysts known as __________.

Energy for what? Create a mind map on what energy from respiration is used for. Energy released by Respiration

Rate of Respiration The rate of respiration in an organism can be measured using a respirometer. Putting a mouse in a respirometer allows us to measure rate of respiration. If the mouse moves around, it needs more oxygen for respiration and breathes faster. This causes the coloured water to move more.

Rate of Respiration Another way of describing rate of respiration is the respiratory quotient (RQ). It can be calculated with the formula: RQ = carbon dioxide produced oxygen used Have a go: A mouse takes in 2.0 cm 3 of oxygen. It releases 1.4 cm 3 of carbon dioxide. Calculate the RQ value. 1.4/2.0 = 0.7 Respiratory Quotient = 0.7

HIGHER

ATP The energy released by respiration is stored in a molecule known as: ATP (Adenosine Triphosphate) ATP molecules can be used as an energy source for many processes inside cells. Metabolic Rate Your metabolic rate is the amount of energy you body needs. It can be estimated simply by measuring how much oxygen has been breathed in.

Task Answer questions 6-8 on page 19 of the new student textbook. ANSWERS: 6.Stored and then used as an energy source for processes in cells. 7.Aerobic respiration releases energy by using oxygen. This means oxygen uptake can be used as a measure. 8.Respiration requires enzymes. Enzymes have an optimum temperature. Snakes warm up their bodies to provide enzymes inside cells with the optimum temperature.

PLENARY

Using pages 18-19, create a quick-quiz of around 5 questions for the person sitting next to you. Give them your book to answer the questions, and then take their book to do the same yourself. Hand the book back to get the answers marked.

Learning Objectives Learn about why animals and plants need energy. Understand what respiration is. Understand what respiratory quotients (RQs) are.

Success Criteria I can state the word and symbol equation for respiration. I can list what energy released from respiration is used for. I can explain what the role of ATP is.