A Level Biology - Exchange & Transport - 1 - Exam Style Questions with Answers

Created on February 17, 2023 By

paruppts12

ALVL_OCR_BIO_3_EXCHANGE_1

1 / 10

Different sized mammals have different surface area to volume ratios.
The table shows the surface areas and volumes of four different groups of mammals.
Which of the options, A to D, is the correct order of surface area to volume ratios for the different
mammals, arranged from the largest to the smallest?

Equus, Mus, Oryctolagus, Rattus

Oryctolagus, Rattus, Equus, Mus

Mus, Oryctolagus, Rattus, Equus

Mus, Rattus, Oryctolagus, Equus

2 / 10

Which of the following statements, A to D, correctly explains a feature of an efficient gaseous exchange surface?

There is a good blood supply, so the system reaches equilibrium quickly.

Ventilation takes place to reduce concentration gradient of dissolved gases.

The layers are thin for a short diffusion distance.

There is an increased surface area to reduce surface area to volume ratio.

3 / 10

B

C

D

A

4 / 10

Air moves in and out of human lungs through the trachea, which is lined with cells. The diagram below shows a section containing these cells.
Which of the following statements about tracheal cells is correct?

Cell X releases mucus into the trachea.

Cell Z is a goblet cell.

Cells X, Y and Z are all columnar epithelial cells.

Cells X and Y move mucus and trapped bacteria out of the trachea.

5 / 10

Bony fish absorb dissolved oxygen from the water using gills. Water is passed through the buccal cavity
and over the gill lamellae. The oxygen saturation of the blood and water changes as the water passes over the gills.
Which of the statements, A to D, correctly describes the way oxygen is transferred into the blood at the gills?

Blood and water flow in a counter current system with a constant concentration gradient between them.

Blood and water flow in a concurrent system with a greater concentration gradient between them at the start of the gill lamella.

Blood and water flow in a concurrent system with a constant concentration gradient between them.

Blood and water flow in a counter current system with a greater concentration gradient between them at the start of the gill lamella.

6 / 10

Which structure, A to D, is not an example of a surface that is specialised for the purpose of gas
exchange?

plasma membrane of a unicellular protoctista

alveolus of a mammal

leaf of a tobacco plant

trachea of an insect

7 / 10

C

A

B

D

8 / 10

. Peak expiratory flow (PEF) is a measure of the maximum rate at which a person can exhale.
The graph below shows the typical PEF values for men of different ages and heights.
Which of the following is the percentage increase from the PEF of a 20 year old man of 175 cm to the PEF of
a 45 year old man of 183 cm?

8.1%

19.4%

12.3%

10.9%

9 / 10

Which of the following muscles in the mammalian ventilation system contract to force air out of the lungs?

the diaphragm

the internal intercostal muscles

all of the muscles in the mammalian ventilation system

the external intercostal muscles

10 / 10

Ventilation is a process that involves various parts of the body.
Which of the following options, A to D, describes exhalation in a mammal?

ribcage moves downwards and inwards; external intercostal muscles relax; diaphragm relaxes

ribcage moves upwards and outwards; external intercostal muscles relax; diaphragm relaxes

ribcage moves upwards and outwards; external intercostal muscles contract; diaphragm relaxes

ribcage moves downwards and inwards; external intercostal muscles contract; diaphragm contracts

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