Exchanges of Substances with the Environment Random Retrieval

This quiz contains all the questions in the Exchanges of Substances with the Environment section. The website will pick 20 questions at random.

1 / 20

Which of the following is an example of a 'source' ?

A photosynthesising leaf.

A Respiring meristem.

A storage tuber in the root.

2 / 20

What piece of equipment is used to measure transpiration ?

Transpirometer

Potometer

Respirometer

3 / 20

Which of the following would decrease the rate of transpiration?

High Humidity

High Light Intensity

High Temperature

4 / 20

What is an Atheroma?

A build up of plaque in the lumen of arterioles and arteries.

A build up of plaque under the endothelial lining of arteries and arterioles.

A blood clot that forms in the lumen when the lining of an artery becomes damaged.

5 / 20

One of the phases of the cardiac cycle is called Atrial Systole. During Atrial Systole, what is happening in the heart during this phase?

The atria contract, increasing the pressure, and the Atrioventricular valve is closed.

The atria contract, reducing the pressure, and the Atrioventricular valve is closed.

The atria contract, increasing the pressure, and the Atrioventricular valve is open.

6 / 20

Does this bar cart show a correlation between number of cigarettes smoked, and the risk of CVD?

Yes

No

7 / 20

Which type of blood vessel has a folded endothelium?

Vein

Arterioles

Artery

8 / 20

What do we call the arteries which supply the heart muscle?

Myocardial Arteries

Coronary Arteries

Cardiac Arteries

9 / 20

Which letter represents the part that can control water loss?

A

B

C

D

10 / 20

Which letter is the tracheae?

A

B

C

D

11 / 20

Why does the blood flow in an opposite direction the the water?

So a steep concentration gradient is formed at the start.

So that a concentration gradient is maintained across the whole length of the lamella.

So that a steep concentration gradient is formed at the end.

12 / 20

Using the diagram, which part is a lamella?

A

B

C

13 / 20

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.

14 / 20

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

15 / 20

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

TRUE

FALSE

16 / 20

Which muscles are contracted when you inhale?

Internal Intercostal Muscles and Diaphragm.

External Intercostal Muscles only.

External Intercostal Muscles and Diaphragm.

Diaphragm only.

17 / 20

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

B & C

C & D

D & E

E & F

18 / 20

How have multicellular organisms adapted to not being able to absorb everything via diffusion over their surface?

A Transport System

Exchange Systems

Transport and Exchange Systems

Moving to maintain a concentration gradient.

19 / 20

Why can single celled organisms exchange many substances by simple diffusion over the plasma membrane?

Because the organelles are always located next to the plasma membrane.

Because there is always a concentration gradient.

Because the organisms have a small surface area to volume ratio.

Because the substances do not need to diffuse far (=short diffusion pathway).

20 / 20

Cresol red is an indicator which goes clear at a low pH. A plate of agar jelly with cresol red added was made, and two blocks were cut out. Block A measured 10mm x 10mm x 10mm. Block B measured 20mm x 7mm x 7mm. You have chosen one which will decolourise the quickest, why did you choose that block?

Because it had the smallest surface area to voume ratio.

Because it had the largest surface area to volume ratio.

Because it had the largest Volume to surface area ratio.

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