U3T2 – Human Gaseous Exchange & Lung Disease

Human Gaseous Exchange & Lung Disease

1 / 25

Which letter represents the trachea?

B

C

D

E

2 / 25

Which two letters would be held open by C shaped cartilage rings?

B & C

C & D

D & E

E & F

3 / 25

Which letter represents the diaphragm?

G

F

E

D

4 / 25

Which term best describes breathing?

Ventilation

Respiration

Inhalation

Exhalation

5 / 25

What shape is the diaphragm when it is contracted?

Domed Up

Domed Down

Zigzag

Flat

6 / 25

Which muscles are contracted when you inhale?

Internal Intercostal Muscles and Diaphragm.

External Intercostal Muscles only.

External Intercostal Muscles and Diaphragm.

Diaphragm only.

7 / 25

Which of the following is the correct sequence for inhalation?

Internal Intercostal Muscles and Diaphragm contract. Thoracic volume increases. Pressure in the lungs decrease

External Intercostal Muscles and Diaphragm contract. Thoracic volume decreases. Pressure in the lungs decreases.

External Intercostal Muscles and Diaphragm contract. Thoracic volume increases. Pressure in the lugs increases.

External Intercostal Muscles and Diaphragm contract. Thoracic volume increases. Pressure in the lungs decreases.

8 / 25

True or False - Air moves into the lungs because the internal pressure in the lungs drops below the atmospheric pressure?

TRUE

FALSE

9 / 25

Which muscles contract when you exhale at rest?

External Intercostal Muscles

Internal Intercostal Muscles

Diaphragm

None

10 / 25

Which muscles contract during forced expiration?

External Intercostal Muscles

Internal Intercostal Muscles

Diaphragm

None

11 / 25

As oxygen diffuses from the alveolar air space into the blood, how many layers of cells does it pass over?

One

Two

Three

Four

12 / 25

What is the correct term for the cells which make up the alveolar wall?

Ciliated Epithelium

Capillary Epithelium

Alveolar Endothelium

Alveolar Epithelium

13 / 25

How is a concentration gradient maintained between the alveolar space and the blood?

Ventilation

Circulation

Ventilation and Circulation

14 / 25

What does Pulmonary Ventilation Rate (PVR) mean?

Volume of blood that passes through the lung in a minute.

Total volume breathed in over a minute during exercise.

Total volume breathed in over a minute at rest.

The time it takes to exhale a full forced vital capaity from the lungs.

15 / 25

Pulmonary Ventilation Rate ( PVR) -= Tidal Volume x breathing rate. If someone take 60 breaths over 5 minutes, and takes in 230 cm³, what is their PVR?

2.76 dm³ min ^-1

2760 dm³ min ^-1

13.8 dm³ min ^-1

0.23 dm³ min ^-1

16 / 25

Pulmonary Ventilation Rate ( PVR) -= Tidal Volume x breathing rate. If the breathing rate is 7, and the PVR is 1.4 dm³ min ^-1, what is the tidal volume?

0.2 dm³

9.8 dm³

200 dm³

980 dm³

17 / 25

If someone's PVR is 1.5dm³ min ^-1, and their tidal volume is 150 cm ³, how many breaths do they take in a minute?

15

10

22

7

18 / 25

Forced Expiratory Volume (FEV) is the maximum volume of air that can be breathed out in 1 second. What is the FEV for person B?

0.5dm³

1.5 dm³

1 dm³

2 dm³

19 / 25

Why might the FEV be lower for person B?

Person B is at rest.

Person A is exercising.

Person B has Asthma.

Person B has Lactose Intolerance.

20 / 25

Why would someone with Pulmonary Fibrosis have a reduced rate of oxygen diffusion?

Decreased concentration gradient.

Increased coughing.

Decreased surface area of alveoli.

Increased diffusion pathway.

21 / 25

Tuberculosis (TB) is caused by bacteria infecting the lungs, where amongst other effects it reduces tidal volume. What happens to the ventilation rate of sufferers?

Increases

Decreases

Stays the same

22 / 25

Emphysema is caused by what?

Too much exercise

Cancer

CVD

Smoking or long term air- pollution

23 / 25

What effect does emphysema have on the alveoli?

Increased surface area.

Increased mucus secretion.

Reduced surface area.

Constricted bronchi and bronchioles.

24 / 25

Sufferers of emphysema also have reduced elastin in the alveolar walls. What effect does this have on breathing?

Alveoli can't stretch so there is a reduced volume on inhalation.

Causes an increase in surface area due to 'baggy' alveolar walls.

Reduced Elastic recoil, so problems with exhaling.

Shorter diffusion pathway due to thinner walls.

25 / 25

What is 'Tidal Volume'?

Average volume inhaled and exhaled when at rest.

Average volume inhaled and exhaled during exercise.

Maximum volume inhaled and exhaled during a deep breath.

Minimum volume inhaled and exhaled at rest.

Thank you for taking the quiz. Please fill in the fields below and you will receive your results in an email.

If you have been set this as homework, you should forward this email to your teacher as evidence you have completed the quiz.

If you don't receive your email please check your spam or junk folder.

Your score is

0%

Recent Posts

Categories