1. The diagram shows a sample of human blood - Edexcel - GCSE Biology - Question 1 - 2017 - Paper 1
Question 1
1. The diagram shows a sample of human blood.
(a) The table shows the minimum and maximum numbers of each type of cell in 1mm³ of human blood.
| human blood cells ... show full transcript
Worked Solution & Example Answer:1. 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.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
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.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
During a bacterial infection, the immune response is activated, leading to an increase in the number of white blood cells. White blood cells, particularly phagocytes and lymphocytes, work to defend the body against pathogens by increasing in number to effectively combat the infection.
Step 3
Complete the sentence by putting a cross (✗) in the box next to your answer.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
✗ A problems clotting blood if they are cut.
Step 4
Describe the function of the liquid part of the blood.
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The liquid part of the blood, known as plasma, serves multiple critical functions. It transports nutrients, hormones, and proteins to the parts of the body that need them. Additionally, it carries waste products to excretory organs, helping to maintain homeostasis and regulate body temperature by distributing heat.
Step 5
State one similarity between adult stem cells and embryonic stem cells.
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Both adult stem cells and embryonic stem cells have the ability to divide and produce different types of specialized cells.
Step 6
State one difference between adult stem cells and embryonic stem cells.
97%
121 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Embryonic stem cells are totipotent, meaning they can develop into any type of body cell, while adult stem cells are multipotent and can only develop into a limited range of cell types.
