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There are many different types of cell in the human body - Edexcel - GCSE Biology - Question 6 - 2012 - Paper 1
Question 6
There are many different types of cell in the human body. (a) Complete the sentence by putting a cross (X) in the box next to your answer. An embryonic stem cell c... show full transcript
Worked Solution & Example Answer:There are many different types of cell in the human body - Edexcel - GCSE Biology - Question 6 - 2012 - Paper 1
Step 1
Complete the sentence by putting a cross (X) in the box next to your answer.
Answer
An embryonic stem cell can differentiate into any type of cell. This characteristic allows embryonic stem cells to develop into various cell types, which is crucial for growth and tissue repair in the body.
Step 2
Describe how the structure of a red blood cell is related to its function.
Answer
The structure of a red blood cell is specifically adapted to its function of transporting oxygen:
- Biconcave Shape: This shape increases the surface area, facilitating greater absorption of oxygen.
- No Nucleus: The absence of a nucleus maximizes the space available for hemoglobin, enhancing oxygen-carrying capacity.
- Thin Membrane: A flexible and thin membrane allows for easy passage through narrow capillaries and minimizes the distance for oxygen diffusion.
- Contains Hemoglobin: Hemoglobin binds to oxygen, making it efficient for oxygen transport throughout the body.
Step 3
Describe the function of platelets.
Answer
Platelets play a crucial role in blood clotting. Their functions include:
- Clotting to Seal a Wound: When a blood vessel is injured, platelets aggregate at the site of the injury.
- Formation of Scabs: They help in forming a protective scab over wounds to prevent further blood loss.
- Stopping Bleeding: Platelets initiate the clotting process, which prevents excessive bleeding.
- Preventing Infection: By sealing the wound, platelets also help in preventing the entry of microbes.