How can we make digestion efficient? Baseline (Flightpath D): To be able to state that the stomach contains acid, state that the liver produces bile and write a simple hypothesis and prediction. Further (Flightpath C&B ): To be able to describe the functions of bile and analyse data in order to determine whether a hypothesis is correct. Challenge Flightpath A): To be able to explain how acid in the stomach increases the efficiency of pepsin, how bile increases the efficiency of fat digestion and explain how the rate of an enzyme-catalysed reaction shows how efficient the reaction is.

How can we make digestion efficient? Learning objective Further understand the how the production of bile in the gall bladder aids digestion

How can we make digestion efficient? Learning Outcomes To be able to describe the functions of bile and analyse data in order to determine whether a hypothesis is correct. To be able to explain how acid in the stomach increases the efficiency of pepsin, how bile increases the efficiency of fat digestion and explain how the rate of an enzyme-catalysed reaction shows how efficient the reaction is.

The gall bladder

Breaking down protein experiment 1/3 fill a test tube with hydrochloric acid 1/3 fill a test tube with pepsin solution 1/3 fill a test tube with a mixture of hydrochloric acid and pepsin Add a chunk of meat to each tube. Leave until next lesson

Question pH can affect enzyme activity. Figure 1 State three conclusions from the data in Figure 1. (3 marks) Explain why pH affects enzyme activity (3 marks)