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The diagram shows the digestive system - Edexcel - GCSE Biology - Question 6 - 2017 - Paper 1
Question 6
The diagram shows the digestive system. (a) (i) Complete the sentence by putting a cross (X) in the box next to your answer. Organ X secretes enzymes into the A s... show full transcript
Worked Solution & Example Answer:The diagram shows the digestive system - Edexcel - GCSE Biology - Question 6 - 2017 - Paper 1
Step 1
Complete the sentence by putting a cross (X) in the box next to your answer.
Answer
The correct answer is B, as organ X refers to the pancreas, which secretes enzymes into the small intestine. Option A is incorrect since the pancreas does not secrete enzymes into the stomach. C is incorrect because it does not secrete into the large intestine, and D is incorrect as it does not secrete enzymes into the liver.
Step 2
Step 3
Suggest how living without a gall bladder may affect these people.
Answer
Living without a gall bladder can impact digestion as the gall bladder stores bile, which helps emulsify fats. Without it, bile is continuously released into the intestine, which may lead to difficulties in digesting high-fat meals, resulting in digestive discomfort and potentially inadequate nutrient absorption.
Step 4
Explain how the structure of the small intestine allows the products of digestion to be absorbed effectively.
Answer
The small intestine has a highly folded inner surface, covered in villi and microvilli, which increases the surface area for absorption. This structure allows for better contact with digested food molecules, facilitating efficient absorption of nutrients such as amino acids, fatty acids, and simple sugars into the bloodstream. Additionally, the presence of blood vessels close to the surface ensures that absorbed nutrients are quickly transported to the body, enhancing the overall efficiency of the digestive process.