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

At the sink, solutes are removed from the phloem, what effect does this have on water movement?

The water potential is increased, so water moves out of the phloem reducing pressure.

The water potential is decreased, so water moves into the phloem increasing pressure.

The water potential remains isotonic, as other solutes are pumped in to replace those lost.

2 / 20

What happens to the solutes at the sink?

They are pumped back up phloem going the other way.

They are more dense so sink down, and gather in cells on the lower surface.

Enzymes break them down or join them together as insoluble storage.

3 / 20

In terms of translocation, what is an 'assimilate'?

An estimation of the mass of glucose your plant will use.

Any organic substance that becomes part of the plant's cells. E.g Amino Acids, Glucose etc.

The mass of amino acids produced by converting glucose.

4 / 20

Which direction will the bubble move?

Towards the beaker

Towards the plant

5 / 20

What term is used to describe the 'sticking' together of water molecules?

Cohesion

Tension

Mass Flow

6 / 20

Which of the following is a way a high salt content in your diet increases your risk of developing CVD?

Salt reduces the water potential of the blood, so water moves out of the endothelium cells via osmosis, causing them to shrivel.

Salt reduces the water potential of the blood, causing water to move in from surrounding tissues via osmosis, leading to an increase in blood pressure, and development of an atheroma.

Salt reduces the water potential of your blood, causing the red blood cells to crenate and form blood clots.

7 / 20

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

Yes

No

8 / 20

If Carbon Dioxide concentration increases, which letter shows the direction the curve will shift?

C

D

Neither

9 / 20

What is a xerophyte?

A plant that has roots exposed to the air.

A plant that grows in low light intensities.

A plant the grows in areas with low water availability.

10 / 20

How is a concentration gradient maintained inside the leaf?

Photosynthesis using carbon dioxide and producing oxygen.

Aerobic respiration using oxygen and producing carbon dioxide.

Photosynthesis and respiration.

11 / 20

Many species of fish have developed a technique to allow a constant flow of oxygenated water over the gills, even when stationary. This is called Buccal Pumping, how does it work?

The tongue lowers, increasing the volume in the mouth so water moves in. The mouth closes, the tongue then moves up, increasing the pressure and forcing the water out over the gill plates.

The tongue lowers, increasing the volume in the mouth so water moves in. The mouth closes, the fish then swallows the water.

The tongue moves down, increasing the volume in the mouth so water moves in through the opercula ( vents) , over the gill plates , and out through the mouth.

12 / 20

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.

13 / 20

Which muscles contract when you exhale at rest?

External Intercostal Muscles

Internal Intercostal Muscles

Diaphragm

None

14 / 20

Which letter represents the trachea?

B

C

D

E

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

Some animals are adapted to higher temperatures in their environment. Which of the following is an example of this ?

Large ears decrease surface area to volume ratio.

Large ears increase surface area to volume ratio.

Large ears can fan the body, carrying away hot air.

Large ears look cute.

17 / 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. Which one will decolourise quickest when placed in an acidic solution ?

Block A

Block B

18 / 20

What is the volume of the same roughly spherical spongy mesophyll cell with a diameter of 80 µm, using the formula Volume=4/3 pi r ³?

2,144,661 µm³

2,144,660µm³

268,082 µm³

268,083 µm³

19 / 20

If we assume a spongy mesophyll cell is approximately a sphere. Using the formula 4 pi r ² , what is its surface area if its diameter is 80 µm?

80,425 µm ²

20,106 µm ²

5,027 µm²

10,054 µm²

20 / 20

A Palisade cell is rectangular, and measures 100 µm by 40 µm. What is its surface area?

4,000 µm²

160,000 µm ²

19,200µm²

5,600 µ²

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