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

What is the tap and water reservoir above it for?

Getting the bubble into the tube

Measuring the volume of water

Resetting the bubble to the start position

2 / 20

How does an increase in wind speed, increase the rate of transpiration?

Increases or maintains the water potential gradient between the air inside the leaf, and the air outside.

Increase in wind is detected by small hairs on the leaves, which open the stomata.

Decreases the water potential gradient between the air inside the leaf, and the air outside.

3 / 20

Xylem or Phloem ? - This type of cell is carries dissolved organic substances both up and down the plant

Xylem

Phloem

4 / 20

Why are the Atrioventricular valves open at D?

Because the heart is in diastole.

Because the pressure is higher in the ventricle than the atrium.

Because the pressure has become higher in the atria than the ventricle.

5 / 20

What happens during Ventricular Systole?

Atrial wall is relaxed, but the ventricular wall is contracted. The Atrioventricular valve is closed, but the Semi Lunar valve is open.

Atrial wall is relaxed, but the ventricular wall is contracted. The Atrioventricular valve is open, but the Semi Lunar valves are closed.

Atrial and ventricular walls are contracted, and the Atrioventricular valve is closed. The Semi Lunar valves are open.

6 / 20

This bar chart shows the risk of CVD with differing amounts of cigarettes smoked per day. Is there a significant difference in risk between smoking no cigarettes, and smoking 1 - 19 cigarettes a day?

Yes

No

7 / 20

In the diagram of the human circulatory system, which letter represents the Pulmonary Vein?

A

B

C

8 / 20

Why is haemoglobin described as being 'Quaternary'?

Because it contains 4 polypeptide chains.

Because it contains 4 haem groups.

Because it contains more than 1 polypeptide chain.

9 / 20

Why are there large gaps between the mesophyll cells ?

To increase surface area for gaseous exchange.

To maintain a concentration gradient for gaseous exchange.

To decrease surface area for gaseous exchange.

10 / 20

Which number represents a layer which is 2 or 3 times thicker in desert plants?

1

3

4

11 / 20

Which number represents cells that can control water loss?

7

8

9

12 / 20

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.

13 / 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

14 / 20

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

Ventilation

Circulation

Ventilation and Circulation

15 / 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. Are the two agar blocks a similar surface area (within 5% difference)?

Yes

No

16 / 20

Which is an example of a behavioural adaptation which allows an animal to live at hotter temperatures?

Having enzymes with a higher optimum temperature.

Finding shade.

Thin, coarse hair or scales.

Small size.

17 / 20

Other than surface area to volume ratio, which is an example of a physiological adaptation, which allows an animal to live at hotter temperatures?

Small surface area:volume ratio.

Thicker hair.

Thicker layer of blubber or fat.

More water reabsorbed by the kidneys to reduce water loss.

18 / 20

Other than surface area to volume ratio, which is an example of a physiological adaptation, which allows an animal to live at colder temperatures?

Thicker layer of blubber or fat.

Large surface area.

Thin, coarse hair.

High metabolism.

19 / 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.

I guessed !

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. Are they a similar volume (within 5% difference)?

Yes

No

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