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Specific cellular defences are part of the body’s immune system and give protection against individual types of pathogen - Scottish Highers Human Biology - Question 12 - 2016
Question 12
Specific cellular defences are part of the body’s immune system and give protection against individual types of pathogen. (a) (i) Explain how a clonal population of... show full transcript
Worked Solution & Example Answer:Specific cellular defences are part of the body’s immune system and give protection against individual types of pathogen - Scottish Highers Human Biology - Question 12 - 2016
Step 1
Explain how a clonal population of lymphocytes would be formed when a pathogen invades the body.
Answer
When a pathogen invades the body, the receptors on the lymphocyte bind to the antigen present on the pathogen. This binding triggers the lymphocyte to undergo repeated division, resulting in a clonal population of lymphocytes that are specific to that antigen.
Step 2
Describe the role of phagocytes in the specific immune response.
Answer
Phagocytes play a crucial role by capturing and engulfing pathogens, such as bacteria and viruses. They display antigens on their surface, which helps to activate T-lymphocytes, thereby coordinating the specific immune response.
Step 3