5 (a) The diagram shows two vessels found in the stems of plants - Edexcel - GCSE Biology - Question 5 - 2013 - Paper 1
Question 5
5 (a) The diagram shows two vessels found in the stems of plants.
(i) Name the vessel that transports water and mineral ions through the plant.
(ii) Energy is need... show full transcript
Worked Solution & Example Answer:5 (a) The diagram shows two vessels found in the stems of plants - Edexcel - GCSE Biology - Question 5 - 2013 - Paper 1
Step 1
Name the vessel that transports water and mineral ions through the plant.
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Answer
The vessel that transports water and mineral ions through the plant is called the xylem.
Step 2
Which cell component supplies energy that can be used for the transport of sugars through the plant?
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Answer
The component that supplies energy for transport of sugars through the plant is the mitochondria, as they are responsible for producing ATP through cellular respiration.
Step 3
Suggest why the percentage of blood going to each of the body parts changes when a person exercises.
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Answer
During exercise, more blood is directed to the muscles to supply them with oxygen and nutrients needed for energy production, while less blood is allocated to non-essential areas like the liver and brain. This enables improved athletic performance and efficiency.
Step 4
State a disadvantage of anaerobic respiration.
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Answer
A disadvantage of anaerobic respiration is that it produces lactic acid, which can lead to muscle fatigue and discomfort.
Step 5
Describe how the circulatory system transports substances around the body.
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Answer
The circulatory system transports substances using blood, which flows through a network of blood vessels. Heart contractions pump oxygenated blood from the lungs through arteries to various body tissues, delivering oxygen and nutrients. Waste products, such as carbon dioxide, are collected and transported back to the heart via veins and then to the lungs for exhalation, maintaining homeostasis throughout the body.
