Topic 6 Transport

1.

1 point

Which vessel carries deoxygenated blood?

The pulmonary artery

The coronary artery

The aorta

The pulmonary vein

2.

1 point

What is the role of the internal intercostal muscles during ventilation of the lungs?

Increasing the pressure in the thorax

Increasing the volume in the thorax

Increasing the surface area of the alveoli

Increasing the diameter of the bronchioles

3.

1 point

What is the function of the right ventricle?

Pumping blood into the pulmonary artery

Pumping blood into the pulmonary vein

Pumping blood into the aorta

Pumping blood into the coronary artery

4.

1 point

Which vessels correspond with the descriptions of I, II and III below?
I. Thick outer layer of longitudinal collagen. Thick layers of circular elastic and muscle fibres. Narrow lumen.
II. Thin outer layer of longitudinal collagen. Thin layers with a few circular elastic and muscle fibres. Wide lumen.
III. Wall consists of single layer of cells. Pores between cells that form the wall. Very narrow lumen.

I = artery; II = Vein; III = Capillary

I = vein; II = artery; III = Capillary

I = artery; II = capillary; III = vein

I = vein; II = capillary; III = artery

5.

1 point

What is happening in the heart when the semi-lunar valves are closed?
I. Blood is entering the aorta.
II. Blood is entering the pulmonary artery.
III. Blood is entering the ventricles.
IV. The ventricles are contracting.

I and II only

I and III only

III only

III and IV only

6.

1 point

What happens during inhalation?

Both the external intercostal muscles and the diaphragm contract.

The internal intercostal muscles contract and the diaphragm relaxes.

The external intercostal muscles relax and the diaphragm contracts.

Both the internal intercostal muscles and the diaphragm relax.

7.

1 point

Which of the following changes occur with the onset of exercise?

Increase in pH of blood

Increase in rate of cellular respiration

Decrease in rate of contraction of the diaphragm

Decrease in carbon dioxide concentration of the blood

8.

1 point

What conditions are necessary for air to be exhaled from the lungs?

Air pressure in the alveoli must become greater than the air pressure in the mouth.

Air pressure in the alveoli must become lower than the air pressure in the mouth.

Air pressure in the alveoli must become the same as the air pressure in the mouth.

There is no change in the air pressure of the alveoli or the mouth.

9.

1 point

What does the body use to control the heartbeat?
I. Adrenalin
II. Pacemaker
III. Nerves from brain

II and III only

I and II only

I, II, and III

I and III only

10.

1 point

Which of the following are functions of all mammalian arteries?
I. To carry oxygenated blood
II. To carry blood away from the heart
III. To carry blood under high pressure

I and III only

I, II and III

II and III only

I and II only

11.

1 point

What is transported by the blood?
I. Carbon dioxide
II Antibodies
III Urea

I only

I and II only

II and III only

I, II and III

12.

1 point

Which of the following best describes the composition of human blood?

Erythrocytes, leucocytes and platelets

Erythrocytes, phagocytes and platelets

Erythrocytes, lymphocytes and platelets

Erythrocytes, antigens and platelets

13.

1 point

Which of the following is part of the process of ventilation?

Changes in the volume of the thoracic cavity

Exchange of gases across the surface of the alveoli

Exchange of gases across the surface of capillaries

Cellular respiration

14.

1 point

Which muscles contract to cause air to pass out from the lungs through the bronchioles?

Internal intercostal muscles and diaphragm

Internal intercostal muscles and abdomen wall muscles

External intercostal muscles and diaphragm

External intercostal muscles and abdomen wall muscles

15.

1 point

How many times does an oxygen molecule cross a plasma membrane when moving from inside an alveolus to the hemoglobin of a red blood cell?

two

three

four

five