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

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

A photosynthesising leaf.

A Respiring meristem.

A root hair cell absorbing nitrate ions.

3 / 20

How do you calculate the rate of water transpired by the plant?

Measure the drop in water from the beaker then divide by time.

Measure the drop in water from the reservoir above the tap.

Measure the radius of the capillary tube, then using the cross section area, multiply by the distance moved by the bubble and divide by time.

4 / 20

What piece of equipment is used to measure transpiration ?

Transpirometer

Potometer

Respirometer

5 / 20

Which of the following would decrease the rate of transpiration?

High Humidity

High Light Intensity

High Temperature

6 / 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.

7 / 20

Name the structures labelled A

Atrioventricular Valve

Semi - Lunar Valve

Bicuspid Valve

8 / 20

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

Yes

No

9 / 20

Capillaries are made only out of one layer of cells called endothelium. Why is this?

To increase the surface area.

To reduce the diffusion pathway.

To decrease surface area.

10 / 20

In the diagram of the human circulatory system, which letter represents the Vena Cava?

A

B

C

11 / 20

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

C

D

Same as human adult

12 / 20

Where in a human, is the saturation of haemoglobin with oxygen the lowest?

Respiring tissues

Arteries

Alveoli

13 / 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.

14 / 20

Which letter represents the part that can control water loss?

A

B

C

D

15 / 20

What is the function of the lamellae?

To maintain a concentration gradient over the whole filament.

To reduce the diffusion pathway.

To increase the surface area.

16 / 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.

17 / 20

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

Ventilation

Circulation

Ventilation and Circulation

18 / 20

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

One

Two

Three

Four

19 / 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.

20 / 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.

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