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

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

A photosynthesising leaf.

A Respiring meristem.

A storage tuber in the root.

2 / 20

Which would not increase the volume of water transpired by the plant?

Low light Intensity

Low Humidity

High wind speed

3 / 20

Water molecules stick together due to what type of bond?

Oxide Bonds

Hydroxide Bonds

Hydrogen Bonds

4 / 20

Which of the following IS NOT a way that smoking contributes to the risk of CVD?

Carbon Monoxide and Nicotine both cause an increase in blood pressure, which increases the risk of an Atheroma forming.

Carbon Monoxide reduces the oxygen carrying capacity of haemoglobin, this increases heart rate and reduces oxygen available to the heart tissues.

Tar sticks to the inside of arteries and arteriole lumen, restricting blood flow, increasing the risk of a thrombus forming.

5 / 20

What happens to the heart during Diastole?

Atrial and Ventricular walls are relaxed, the Atrioventricular valve is closed.

Atrial and Ventricular walls are relaxed, and the Atrioventricular valve is open.

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

6 / 20

Name the structures labelled A

Atrioventricular Valve

Semi - Lunar Valve

Bicuspid Valve

7 / 20

Why can we not state using this data, CVD is caused by smoking?

Because P only = 0.006 for the linear trend.

Because the 95% Confidence Intervals overlap for two of the results.

Because CVD may have been caused by other things such as diet, exercise , age etc.

8 / 20

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

A

B

C

9 / 20

Why is it useful that the Bohr Effect reduces the percentage saturation of Haemoglobin with oxygen?

reduction in saturation also causes a reduction in partial pressure, so a concentration gradient is maintained.

The oxygen has unloaded from the haemoglobin, so it can be exhaled via the lungs.

The oxygen has unloaded from the haemoglobin, so it is available for aerobic respiration in the tissues

10 / 20

What term describes the haem groups which contain iron?

Co-factor

Prosthetic Group

Active Site

11 / 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.

12 / 20

Which number represents cells that can control water loss?

7

8

9

13 / 20

The blood and water flow in opposite directions, what is this called?

Antagonistic System

Opposing System

Counter-current System

14 / 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.

15 / 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.

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

Which muscles contract when you exhale at rest?

External Intercostal Muscles

Internal Intercostal Muscles

Diaphragm

None

18 / 20

Which of the following is the correct sequence for inhalation?

Internal Intercostal Muscles and Diaphragm contract. Thoracic volume increases. Pressure in the lungs decrease

External Intercostal Muscles and Diaphragm contract. Thoracic volume decreases. Pressure in the lungs decreases.

External Intercostal Muscles and Diaphragm contract. Thoracic volume increases. Pressure in the lugs increases.

External Intercostal Muscles and Diaphragm contract. Thoracic volume increases. Pressure in the lungs decreases.

19 / 20

Which muscles are contracted when you inhale?

Internal Intercostal Muscles and Diaphragm.

External Intercostal Muscles only.

External Intercostal Muscles and Diaphragm.

Diaphragm only.

20 / 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.

Your score is

0%

Recent Posts

Categories