Which flowchart correctly shows an interaction between B and T lymphocytes during an immune response?
(A)
Infection
↓
T cells recognise antigen as foreign
↓
B cells stimulated and antibodies produced
(B)
Infection
↓
B cells recognise antigen as foreign
↓
T cells stimulated and antibodies produced
(C)
Infection
↙ ↘
T cells stimulated and antibodies produced
B cells recognise antigen as foreign
(D)
Infection
↙ ↘
B cells stimulated and antigen produced
T cells recognise antibody as foreign - HSC - SSCE Biology - Question 12 - 2007 - Paper 1
Question 12
Which flowchart correctly shows an interaction between B and T lymphocytes during an immune response?
(A)
Infection
↓
T cells recognis... show full transcript
Worked Solution & Example Answer:Which flowchart correctly shows an interaction between B and T lymphocytes during an immune response?
(A)
Infection
↓
T cells recognise antigen as foreign
↓
B cells stimulated and antibodies produced
(B)
Infection
↓
B cells recognise antigen as foreign
↓
T cells stimulated and antibodies produced
(C)
Infection
↙ ↘
T cells stimulated and antibodies produced
B cells recognise antigen as foreign
(D)
Infection
↙ ↘
B cells stimulated and antigen produced
T cells recognise antibody as foreign - HSC - SSCE Biology - Question 12 - 2007 - Paper 1
Step 1
A
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Answer
Option A presents the flowchart where T cells recognize the antigen as foreign and subsequently stimulate B cells to produce antibodies. This sequence highlights the critical interaction between B and T lymphocytes during an immune response. T cells first recognize the pathogen and initiate the immune cascade.
Step 2
B
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Answer
Option B suggests that B cells recognize the antigen first, which then stimulates T cells to produce antibodies. This is an incorrect representation of the typical immune response sequence.
Step 3
C
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Answer
Option C depicts a simultaneous response where both T cells and B cells are activated, which is not the most accurate representation of the interaction where T cells first regulate the response.
Step 4
D
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Answer
Option D incorrectly represents the sequence, implying that B cells are stimulated by the production of antigens, which is not how the immune interaction typically unfolds.
