The diagram shows a sample of human blood - Edexcel - GCSE Biology - Question 1 - 2017 - Paper 1
Question 1
The diagram shows a sample of human blood.
The table shows the minimum and maximum numbers of each type of cell in 1mm³ of human blood.
| human blood cells | numbe... show full transcript
Worked Solution & Example Answer:The diagram shows a sample of human blood - Edexcel - GCSE Biology - Question 1 - 2017 - Paper 1
Step 1
State the most common type of cell in human blood.
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Answer
The most common type of cell in human blood is red blood cells.
Step 2
Explain why the number of blood cells will change if a person has a bacterial infection.
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Answer
During a bacterial infection, the immune response is activated, resulting in an increase in the number of white blood cells. These cells are crucial for defending against pathogens, and their count rises as they work to engulf and destroy the bacteria.
Step 3
Complete the sentence by putting a cross (✗) in the box next to your answer.
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Answer
☑ problems clotting blood if they are cut.
Step 4
Describe the function of the liquid part of the blood.
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Answer
The liquid part of the blood, known as plasma, serves several important functions including transporting nutrients, hormones, and waste products throughout the body. It also plays a role in maintaining blood pressure and regulating body temperature.
Step 5
State one similarity between adult stem cells and embryonic stem cells.
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Answer
Both adult and embryonic stem cells can keep dividing and are capable of producing specialized cells.
Step 6
State one difference between adult stem cells and embryonic stem cells.
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Answer
Embryonic stem cells are totipotent, meaning they can differentiate into any type of body cell, whereas adult stem cells are multipotent and can only develop into a limited range of cell types.
