Please check the examination details below before entering your candidate information
Candidate surname Other names
Centre Number Candidate Number
Edexcel GCE
Thursday 21 May 2026
Morning (Time: 1 hour 30 minutes) Paper
reference 8BI0/02 Mark Scheme (Results)
Biology B
Advanced Subsidiary
PAPER 2: Core Physiology and Ecology
Summer 2026
You must have: Total Marks
Scientific calculator, HB pencil, ruler
Instructions Edexcel Advanced Subsidary in Biology B
•• Use black ink or ball-point pen.
Fill in the boxes at the top of this page with your name,
Salters Nuffied
centre number and candidate number. 8BI0 02
•• Answer all questions.
Answer the questions in the spaces provided
– there may be more space than you need.
Information
•• The total mark for this paper is 80.
The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
• Into question(s) marked with an asterisk (*), marks will be awarded for your ability
structure your answer logically, showing how the points that you make are
related or follow on from each other where appropriate.
Advice
•• Read each question carefully before you start to answer it.
Try to answer every question.
• Check your answers if you have time at the end.
Turn over
P79081A
P:1/1/1/1/1/1/
Education Ltd. *P79081A0128*
, Answer ALL questions.
Some questions must be answered with a cross in a box . If you change your mind about an Edexcel and BTEC Qualifications
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
answer, put a line through the box and then mark your new answer with a cross .
1 Electrocardiograms (ECGs) record electrical activity during the cardiac cycle.
Edexcel and BTEC qualifications are awarded by the UK’s
(a) The cardiac cycle is coordinated by myogenic stimulation. largest awarding body. We provide a wide range of qualifications
Which of the following statements are correct? including academic, vocational, occupational and specific
programmes for employers. For further information visit our
1 The sinoatrial node (SAN) is in the wall of the left atrium. qualifications websites at or .
2 The SAN sends nerve impulses to the atrioventricular node (AVN). Alternatively, you can get in touch with us using the details on our
contact us page at
3 The bundle of His connects the AVN to the apex of the heart.
(1)
A 2 only
B 3 only
C 1 and 2
helping people progress, everywhere
D 1 and 3
aspires to be the world’s leading learning company. Our aim is to help
(b) Atrial systole is one stage in the cardiac cycle. everyone progress in their lives through education. We believe in every kind of
learning, for all kinds of people, wherever they are in the world. We’ve been
Which row of the table is correct for the valves during atrial systole?
(1) involved in education for over 150 years, and by working across 70 countries, in
100 languages, we have built an international reputation for our commitment to
high standards and raising achievement through innovation in education. Find
Atrioventricular valves Semilunar valves
(between the atrium and ventricle) (at the base of the arteries) out more about how we can help you and your students at:
A closed closed
B closed open
C open closed
D open open
Summer 2026
Question Paper Log Number P79081A
Publication Code 8BI0_01_2606_MS
All the material in this publication is
2
*P79081A0228*
, General Marking Guidance
The diagrams show ECGs from two people, person A and person B.
• All candidates must receive the same treatment. Examiners must mark the
Person A
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
first candidate in exactly the same way as they mark the last.
• Mark schemes should be applied positively. Candidates must be rewarded
for what they have shown they can do rather than penalised for omissions.
• Examiners should mark according to the mark scheme not according to their
perception of where the grade boundaries may lie.
• There is no ceiling on achievement. All marks on the mark scheme should be
used appropriately.
• All the marks on the mark scheme are designed to be awarded. Examiners
should always award full marks if deserved, i.e. if the answer matches the
Person B
mark scheme. Examiners should also be prepared to award zero marks if the
candidate’s response is not worthy of credit according to the mark scheme.
• Where some judgement is required, mark schemes will provide the principles
by which marks will be awarded and exemplification may be limited.
• When examiners are in doubt regarding the application of the mark scheme
to a candidate’s response, the team leader must be consulted.
• Crossed out work should be marked UNLESS the candidate has replaced it
with an alternative response.
Describe two differences in the cardiac cycle shown by these two ECGs.
(2)
1 ............................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .......................... ................................................................................................................. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
................................. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 ............................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .......................... ................................................................................................................. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
................................. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(Total for Question 1 = 4 marks)
3
*P79081A0328* Turn over
Candidate surname Other names
Centre Number Candidate Number
Edexcel GCE
Thursday 21 May 2026
Morning (Time: 1 hour 30 minutes) Paper
reference 8BI0/02 Mark Scheme (Results)
Biology B
Advanced Subsidiary
PAPER 2: Core Physiology and Ecology
Summer 2026
You must have: Total Marks
Scientific calculator, HB pencil, ruler
Instructions Edexcel Advanced Subsidary in Biology B
•• Use black ink or ball-point pen.
Fill in the boxes at the top of this page with your name,
Salters Nuffied
centre number and candidate number. 8BI0 02
•• Answer all questions.
Answer the questions in the spaces provided
– there may be more space than you need.
Information
•• The total mark for this paper is 80.
The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
• Into question(s) marked with an asterisk (*), marks will be awarded for your ability
structure your answer logically, showing how the points that you make are
related or follow on from each other where appropriate.
Advice
•• Read each question carefully before you start to answer it.
Try to answer every question.
• Check your answers if you have time at the end.
Turn over
P79081A
P:1/1/1/1/1/1/
Education Ltd. *P79081A0128*
, Answer ALL questions.
Some questions must be answered with a cross in a box . If you change your mind about an Edexcel and BTEC Qualifications
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
answer, put a line through the box and then mark your new answer with a cross .
1 Electrocardiograms (ECGs) record electrical activity during the cardiac cycle.
Edexcel and BTEC qualifications are awarded by the UK’s
(a) The cardiac cycle is coordinated by myogenic stimulation. largest awarding body. We provide a wide range of qualifications
Which of the following statements are correct? including academic, vocational, occupational and specific
programmes for employers. For further information visit our
1 The sinoatrial node (SAN) is in the wall of the left atrium. qualifications websites at or .
2 The SAN sends nerve impulses to the atrioventricular node (AVN). Alternatively, you can get in touch with us using the details on our
contact us page at
3 The bundle of His connects the AVN to the apex of the heart.
(1)
A 2 only
B 3 only
C 1 and 2
helping people progress, everywhere
D 1 and 3
aspires to be the world’s leading learning company. Our aim is to help
(b) Atrial systole is one stage in the cardiac cycle. everyone progress in their lives through education. We believe in every kind of
learning, for all kinds of people, wherever they are in the world. We’ve been
Which row of the table is correct for the valves during atrial systole?
(1) involved in education for over 150 years, and by working across 70 countries, in
100 languages, we have built an international reputation for our commitment to
high standards and raising achievement through innovation in education. Find
Atrioventricular valves Semilunar valves
(between the atrium and ventricle) (at the base of the arteries) out more about how we can help you and your students at:
A closed closed
B closed open
C open closed
D open open
Summer 2026
Question Paper Log Number P79081A
Publication Code 8BI0_01_2606_MS
All the material in this publication is
2
*P79081A0228*
, General Marking Guidance
The diagrams show ECGs from two people, person A and person B.
• All candidates must receive the same treatment. Examiners must mark the
Person A
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
first candidate in exactly the same way as they mark the last.
• Mark schemes should be applied positively. Candidates must be rewarded
for what they have shown they can do rather than penalised for omissions.
• Examiners should mark according to the mark scheme not according to their
perception of where the grade boundaries may lie.
• There is no ceiling on achievement. All marks on the mark scheme should be
used appropriately.
• All the marks on the mark scheme are designed to be awarded. Examiners
should always award full marks if deserved, i.e. if the answer matches the
Person B
mark scheme. Examiners should also be prepared to award zero marks if the
candidate’s response is not worthy of credit according to the mark scheme.
• Where some judgement is required, mark schemes will provide the principles
by which marks will be awarded and exemplification may be limited.
• When examiners are in doubt regarding the application of the mark scheme
to a candidate’s response, the team leader must be consulted.
• Crossed out work should be marked UNLESS the candidate has replaced it
with an alternative response.
Describe two differences in the cardiac cycle shown by these two ECGs.
(2)
1 ............................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .......................... ................................................................................................................. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
................................. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 ............................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .......................... ................................................................................................................. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
................................. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................................................................................................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(Total for Question 1 = 4 marks)
3
*P79081A0328* Turn over
