Digestion - 3T

Digestion - 3T

Revision Questions

Multiple Choice

Which one of the following substances helps to break down large insoluble molecules into small, soluble molecules?

• acid

• bile

• enzymes

• oxygen

What are Enzymes?

• helps to speed up digestion without itself being changed.

• Each enzyme only digests a specific type of nutrient.

• Enzymes are affected by temperature.

• Different enzymes work well at different pH.

  
  

Multiple Choice

Which of the following organs are involved in the digestion of fat?

• Q, R, S

• Q, S, T

• R, S, T

• S, T, U

Label the respective organs

• Q: Mouth - digests starch

• R: Stomach - digests proteins

• S: Liver - produces bile to break up large fat droplets into small fat droplets

• T: Gall Bladder - stores bile

• U: Small Intestine - digests starch, proteins and fats

Multiple Choice

Which one of the following is not a function of the part labelled S?

• removes alcohol

• produced urea

• digests protein

• stores excess glucose

TB pg 11: Other functions of the liver include

• Storing excess glucose

• Breaking down excess proteins in our diet into urea, which is removed in our urine

• Breaking down harmful substances such as alcohol and drugs into harmless substances in a process known as detoxification.

Multiple Choice

Which one of the following organs are involved in the digestion of proteins?

• Q and R

• R and S

• R and U

• T and U

Multiple Choice

Food materials entering and leaving the digestive systems (from mouth to anus) pass through the following organs except

• stomach

• pancreas

• small intestine

• gullet

Multiple Choice

Carbohydrates (starch) are mainly digested in the

• mouth and stomach

• mouth and small intestine

• stomach and small intestine

• stomach and pancreas

Multiple Choice

After digestion is completed, the digested food is absorbed by the ............... into the ................. and transported to all parts of the body.

• stomach, bloodstream

• small intestine, water

• small intestine, blood stream

• large intestine, water

Multiple Choice

The gall bladder

• produces bile which digests fats

• stores and releases bile

• secretes acid to activate enzymes

• secrets enzymes to digest food

Multiple Choice

Which of the following is not a function of the pancreas?

• produces enzymes to digest carbohydrates, fats and proteins

• release of the hormone insulin to regulate blood glucose

• release digestive enzymes into the small intestine

• produces acidic substances to neutralise the contents of the stomach

TB Pg12: Functions of the pancreas

• produces enzymes that digest carbohydrates, proteins and fats

• releases these enzymes into the small intestine for the digestion of food

• release of the hormone insulin to regulate blood glucose (Copy this!)

Multiple Choice

Enzymes in our digestive system require the following optimum physical conditions to speed up the rate of digestion.

• temperature and pH

• pH and amount of water

• pH and amount of food substances

• temperature and amount of water

Multiple Choice

What happens to the enzyme action at the parts of the graph labelled X and Y?

• X: The rate of enzyme activity is slow.

  
  

  Y: The rate of enzyme activity is fast.

• X: The rate of enzyme activity is slow.

  
  

  Y: The rate of enzyme activity is slow.

• X: The rate of enzyme activity is fast.

  
  

  Y: The rate of enzyme activity is fast.

• X: The rate of enzyme activity is fast.

  
  

  Y: The rate of enzyme activity is slow.

Multiple Choice

The enzyme works best at approximately

• 0 °C

• 30 °C

• 40 °C

• 65 °C

Multiple Choice

Which one of the following is a result of excessive alcohol consumption?

• constipation

• liver cancer

• diabetes

• throat cancer

Multiple Choice

Constipation can be prevented by having a diet high in

• carbohydrates

• vitamins

• minerals

• dietary fibre

Multiple Choice

The blood of a diabetic person contains a high level of

• protein

• fat

• glucose

• minerals

Fill in the Blanks

In the mouth, saliva contains

that help in the digestion of carbohydrates.

Fill in the Blanks

Food from the mouth enters the stomach through the

Multiple Select

Tick the correct function of Mouth

• produces enzymes

• digestion of food

• absorption of food / water

• removal of waste materials

Multiple Select

Tick the correct function of Stomach

• produces enzymes

• digestion of food

• absorption of food / water

• removal of waste materials

Multiple Select

Tick the correct function of small intestine

• produces enzymes

• digestion of food

• absorption of food / water

• removal of waste materials

Multiple Select

Tick the correct function of large intestine

• produces enzymes

• digestion of food

• absorption of food / water

• removal of waste materials

Multiple Select

Tick the correct function of rectum

• produces enzymes

• digestion of food

• absorption of food / water

• removal of waste materials

Multiple Select

Tick the correct function of liver

• produces enzymes

• digestion of food

• absorption of food / water

• removal of waste materials

Multiple Select

Tick the correct function of pancreas

• produces enzymes

• digestion of food

• absorption of food / water

• removal of waste materials

Multiple Select

Tick the correct function of gall bladder

• produces enzymes

• digestion of food

• absorption of food / water

• removal of waste materials

• none of the above