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IGCSE Biology Extended11.1.2—Following parts of the breathingTopic Practice

11.1.2—Following parts of the breathing

• Identify in diagrams and images the following parts of the breathing system: lungs, diaphragm, ribs, intercostal muscles, larynx, trachea, bronchi, bronchioles, alveoli and associated capillaries

Question 1(a)

[Maximum number: 6]

Fig. 1.1 shows the human gas exchange system. The functions of the parts of the gas exchange system are given in Table 1.1.

Fig. 1.1

Fig. 1.1

Complete Table 1.1. One row has been done for you.

Table 1.1

Table 1.1

Question 1(b)

[Maximum number: 4]

Fig. 1.1 shows two photomicrographs of a cross-section of trachea.

Fig. 1.1

Fig. 1.1

Describe and explain the functions of the structures or substances labelled B to E in Fig. 1.1. Use the letters in Fig. 1.1 in your answer.

Question 1(a)(i)

[Maximum number: 3]

Fig. 1.1 is a diagram of the human gas exchange system.

Fig. 1.1

Fig. 1.1

Identify the structures labelled A, B and C in Fig. 1.1.

A

B
C

Question 13

[Maximum number: 1]

The diagram shows the surface view of part of the epidermis of a leaf.

Question image

How many guard cells are present?

A

0

B

3

C

6

D

12

Question 19

[Maximum number: 1]

The diagram shows part of the human gas exchange system.

Question image

Which row identifies P, Q and R ?

P

Q

R

alveolus wall

capillary wall

vein

bronchiole

alveolus wall

capillary

capillary

layer of moisture

bronchiole

alveolus wall

bronchiole

capillary

Question 19

[Maximum number: 1]

What is the sequence of structures through which a molecule of oxygen passes from the air to the blood of a person?

1 bronchiole
2 capillary
3 alveolus wall
4 larynx

A

1→4→2→31 \rightarrow 4 \rightarrow 2 \rightarrow 3

B

3→2→1→43 \rightarrow 2 \rightarrow 1 \rightarrow 4

C

4→1→3→24 \rightarrow 1 \rightarrow 3 \rightarrow 2

D

4→2→1→34 \rightarrow 2 \rightarrow 1 \rightarrow 3

Question 20

[Maximum number: 1]

What is the path of carbon dioxide as it leaves the lungs?

A

alveolus → bronchiole → bronchus → trachea

B

alveolus → bronchus → bronchiole → trachea

C

trachea → bronchiole → bronchus → alveolus

D

trachea → bronchus → bronchiole → alveolus

Question 22

[Maximum number: 1]

Which pathway is followed by air passing into the body?

A

larynx →\rightarrow trachea → bronchi →\rightarrow bronchioles →\rightarrow alveoli

B

larynx →\rightarrow trachea → bronchioles →\rightarrow bronchi →\rightarrow alveoli

C

trachea → larynx → bronchi → alveoli → bronchioles

D

trachea → larynx → bronchi → bronchioles → alveoli

Question 22

[Maximum number: 1]

The diagram shows the human gas exchange system.

Question image

Which row shows the correct labels?

1

2

3

4

trachea

larynx

bronchus

diaphragm

larynx

trachea

bronchus

diaphragm

trachea

larynx

diaphragm

bronchus

larynx

trachea

diaphragm

bronchus

Question 5(a)

[Maximum number: 4]

Table 5.1 shows four functions of the human gas exchange system.

Complete Table 5.1 by identifying the part of the human gas exchange system that carries out each function.

Table 5.1

Table 5.1

0 selected