CAIE A-Level Biology AS 8.1.1 Closed Double Circulation Questions
Explain closed double circulation and its advantages using evidence from each question and mark scheme.
- Syllabus
- 2028–2030
- Course
- Biology 9700
- Level
- AS
Exam points
- Explain the features of a closed double circulatory system and its advantages.
CAIE A-Level Biology AS 8.1.1 Closed Double Circulation Questions question 1
[Maximum number: 1]
Ventricular septal defect (VSD) is a heart defect that people can have from birth. People with VSD have a hole in the wall (septum) that separates the left and right ventricles.
What could happen in a person with VSD?
1 Blood will leak through the hole, mostly from right to left.
2 The volume of blood circulating through the lungs will be higher than in a person without VSD.
3 Less oxygen will be delivered to the body tissues.
A
1, 2 and 3
B
1 and 2 only
C
1 and 3 only
D
2 and 3 only
D
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