CAIE A-Level Biology AS 8.1 The Circulatory System Questions

Practise mammalian circulation questions by tracing heart vessels, identifying blood cells and vessels, and explaining capillary exchange and tissue fluid.

Exam points

Define closed double circulation and trace pulmonary and systemic flow through heart, lungs and body.
Identify the aorta, venae cavae and pulmonary vessels from their heart chambers and directions of flow.
Distinguish arteries, arterioles, capillaries, venules and veins using wall, lumen, pressure or flow evidence.
Relate artery and vein wall tissues, lumen and valves to pressure, recoil, return and capillary exchange.
Interpret artery and vein plan diagrams in transverse or longitudinal section using layers and relative thickness.
Identify red cells, neutrophils, monocytes and lymphocytes in images; link features to transport or immune roles.
Explain how plasma water dissolves transported solutes and buffers temperature change.
Compare blood, tissue fluid and lymph; explain capillary filtration, reabsorption and lymph drainage.

Covered syllabus points

8.1.1—Closed double circulation 8.1.2—Blood vessels 8.1.3—Main blood vessels 8.1.4—Blood vessel recognition 8.1.5—Plan diagrams of arteries and veins 8.1.6—Structure-function relationships 8.1.7—Blood cells 8.1.8—Water as main blood component 8.1.9—Tissue fluid

[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.

1, 2 and 3

1 and 2 only

1 and 3 only

2 and 3 only

[Maximum number: 1]

When a blood vessel is damaged it can result in problems in the body.
Which row identifies the blood vessel that could have been damaged?

blood is not being distributed to organs that need it

blood is not returning to the heart and is collecting in organs

blood surges mean that relatively constant blood pressure is not maintained

elastic artery

muscular artery

vein

elastic artery

vein

muscular artery

elastic artery

vein

muscular artery

vein

elastic artery

[Maximum number: 1]

Which blood vessels carry blood into the atria?

1 coronary artery
2 vena cava
3 pulmonary artery
4 pulmonary vein

1 and 2

1 and 3

2 and 3

2 and 4

[Maximum number: 1]

The photomicrograph shows two blood vessels P and Q.
Both these blood vessels are part of a network which transports blood around the body.

Figure for Question 4 — CAIE A-Level Biology AS

Which row is correct for blood vessel P and blood vessel Q?

blood vessel P

blood vessel Q

carries blood into arterioles

carries blood from venules

carries blood into arterioles

carries blood from venules

[Maximum number: 1]

Plan diagrams of two blood vessels are shown.

Figure for Question 5 — CAIE A-Level Biology AS

Which labels are correct?

Table for Question 5 — CAIE A-Level Biology AS

[Maximum number: 1]

The diagram shows a transverse section through an artery.

Figure for Question 6 — CAIE A-Level Biology AS

Which tissues are present in layer X?

collagen and smooth muscle only

elastic fibres and collagen only

elastic fibres and smooth muscle only

elastic fibres, collagen and smooth muscle

[Maximum number: 1]

Which process can be carried out by a mature red blood cell?

active transport

cell division

phagocytosis

protein synthesis

[Maximum number: 1]

Which components of blood are present in tissue fluid?

phagocytes

some proteins

sodium ions

✓

$\boldsymbol{\chi}$

✓

key

✓ = present

$\boldsymbol{\chi}=$ not present

All question bank results loaded

Covered syllabus points

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8