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

Through which part does the water evaporate out of the leaf?

Guard Cells

Stomata

Lower Epidermis Cells

2 / 20

What has happened at position A?

The Atrioventricular valves open.

The Atrioventricular valves close.

The Semi- Lunar valves open.

3 / 20

What is the stroke volume of a patient if their cardiac output is 3500 cm³ min^-1, and their heart rate is 70 bpm?

50 dm³

50 cm³

500 cm³

4 / 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

5 / 20

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

Respiring tissues

Arteries

Alveoli

6 / 20

What unit do we use to measure the concentration of oxygen in the tissue?

Moles

Kilo Pascals

Percentage

7 / 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.

8 / 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.

9 / 20

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

1

3

4

10 / 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.

11 / 20

Using the diagram, which part is a gill filament?

A

B

C

12 / 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.

13 / 20

Emphysema is caused by what?

Too much exercise

Cancer

CVD

Smoking or long term air- pollution

14 / 20

Pulmonary Ventilation Rate ( PVR) -= Tidal Volume x breathing rate. If the breathing rate is 7, and the PVR is 1.4 dm³ min ^-1, what is the tidal volume?

0.2 dm³

9.8 dm³

200 dm³

980 dm³

15 / 20

What is the correct term for the cells which make up the alveolar wall?

Ciliated Epithelium

Capillary Epithelium

Alveolar Endothelium

Alveolar Epithelium

16 / 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

17 / 20

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

TRUE

FALSE

18 / 20

What shape is the diaphragm when it is contracted?

Domed Up

Domed Down

Zigzag

Flat

19 / 20

Which term best describes breathing?

Ventilation

Respiration

Inhalation

Exhalation

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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