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

In the mass flow hypothesis, the water potential is reduced in the phloem near the sources. What will happen to water movement?

Water will move into the source cells via osmosis, from the phloem. Reducing the pressure in the phloem.

The same amount of water will move in as move out as it is now isotonic.

Water will move into the phloem via osmosis, increasing the pressure.

2 / 20

What piece of equipment is used to measure transpiration ?

Transpirometer

Potometer

Respirometer

3 / 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.

4 / 20

The evaporation of water molecules out of the leaf, 'pulls' the water molecules behind up. What is this 'pull' called ?

Cohesion

Tension

Mass Flow

5 / 20

What has happened at position D?

The Atrioventricular valves open.

The Atrioventricular valves close.

The Semi- Lunar valves open.

6 / 20

Which type of blood vessel has a folded endothelium?

Vein

Arterioles

Artery

7 / 20

What do we call the arteries which supply the kidneys?

Hepatic Arteries

Carotid Arteries

Renal Arteries

8 / 20

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

Myocardial Arteries

Coronary Arteries

Cardiac Arteries

9 / 20

In which direction ( if any), would a curve be for humming bird haemoglobin?

C

D

Same as human adult

10 / 20

Why do the guard cells become 'curved' when they swell up?

Because the water fills them up.

Because the cell wall next to the stoma is thicker.

Because the internal cytoskeleton bends.

11 / 20

How does water move into the guard cells?

Translocation

Transpiration

Osmosis

12 / 20

Using the diagram, which part is a lamella?

A

B

C

13 / 20

Using the diagram, which part is a gill filament?

A

B

C

14 / 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.

15 / 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

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 colder temperatures?

Thicker layer of blubber or fat.

Large surface area.

Thin, coarse hair.

High metabolism.

18 / 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

19 / 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

20 / 20

The surface area in biology often refers roughly to how much skin an organism has, or how much cell membrane a cell has. Which of the following will have the biggest surface area, if they are all approximately the same length and width?

Spongy Mesophyll Cell

Root Hair Cell

Guard Cell

Palisade Cell

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