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HIA International — Grade 8

Unit 1: Photosynthesis and the carbon cycle

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Unit 2: Properties of materials

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Unit 3: Forces and energy

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Unit 4: Maintaining life

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Unit 5: Reactivity

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Unit 6: Sound and space

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Unit 7: Genes and inheritance

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Unit 8: Rates of reaction

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Unit 9: Electricity

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Quiz

Excretion In Humans – Quiz

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Excretion In Humans HIA Science quiz: free practice for HIA International. Work through this Excretion In Humans HIA Science quiz and get instant feedback on every answer. If you get stuck, review the 22.8 Excretion In Humans – Notes lesson. More practice: HIA International — all units. Syllabus: Cambridge Lower Secondary programme.

  • Questions count: 50
  • Passing grade: A-
  • Time limit:
Start Quiz
1.
Which organ makes urea?
The kidney
The liver
The lung
The bladder
2.
Why is passing out faeces not excretion?
It contains no water
The food was never made by the body's reactions
It leaves too slowly
It is solid
3.
Which waste do the lungs excrete?
Undigested food
Carbon dioxide
Salts
Urea
4.
What is excretion?
Breathing in oxygen
Taking in food
Removing the waste products made by reactions inside the body
Passing out undigested food
5.
Which organ filters the blood and makes urine?
The lungs
The large intestine
The liver
The kidney
6.
What does urine contain?
Undigested food
Carbon dioxide and oxygen
Blood cells and protein
Urea, water and salts
7.
Where is urea made from?
Excess protein broken down in the liver
Undigested fibre
Sugar in the muscles
Carbon dioxide in the lungs
8.
Besides removing waste, what else does sweating do?
It stores urine
It digests food
It makes urea
It cools the body
9.
What does the bladder do?
Excretes carbon dioxide
Stores urine
Filters blood
Makes urea
10.
Which organ also controls the body's water balance?
The kidneys
The large intestine
The bladder
The lungs
11.
What happens to waste if the kidneys fail?
It builds up in the blood
It disappears
It is turned into food
It leaves through the lungs instead
12.
How can a person with failed kidneys be treated?
Drinking no water
A lung transplant
Eating more protein
Dialysis or a kidney transplant
13.
In the diagram, which label shows a kidney?
Dr Dabour Hub Academy - figure 1
D
C
B
A
14.
In the diagram, which label shows the organ that stores urine?
Dr Dabour Hub Academy - figure 2
C
A
B
D
15.
In the diagram, which label shows the urethra, through which urine leaves the body?
Dr Dabour Hub Academy - figure 3
A
C
B
D
16.
Using the bar chart, what is the total water lost in one day?
Dr Dabour Hub Academy - figure 4
1500 cm³
2000 cm³
3000 cm³
2500 cm³
17.
Using the bar chart, what percentage of water is lost as urine?
Dr Dabour Hub Academy - figure 5
60%
50%
40%
75%
18.
On a very hot day, how would the bar chart most likely change?
Dr Dabour Hub Academy - figure 6
All routes would stay the same
Urine would increase and sweat would decrease
Sweat would increase and urine would decrease
Faeces would become the largest
19.
What does the graph show about drinking water and urine?
Dr Dabour Hub Academy - figure 7
Urine does not depend on water drunk
The more water drunk, the more urine is produced
Urine stops above 500 cm³
Drinking water reduces urine
20.
Using the graph, how much urine is produced after drinking 500 cm³?
Dr Dabour Hub Academy - figure 8
680 cm³
320 cm³
500 cm³
150 cm³
21.
Why is some urine made even when no water is drunk?
Dr Dabour Hub Academy - figure 9
Urine comes from the lungs
The graph is wrong
The bladder makes water
The kidneys must still remove urea and salts from the blood
22.
Using the bar chart, by how much does the kidney reduce the urea in the blood?
Dr Dabour Hub Academy - figure 10
0.30 g per litre
0.24 g per litre
0.36 g per litre
0.06 g per litre
23.
In the experiment shown, which tube turns milky first?
Dr Dabour Hub Academy - figure 11
Tube B, because exhaled air has more carbon dioxide
Both at the same time
Neither tube
Tube A, because inhaled air has more carbon dioxide
24.
What does the limewater experiment show about the lungs?
Dr Dabour Hub Academy - figure 12
They excrete carbon dioxide made by respiration
They make urea
They absorb carbon dioxide
They store urine
25.
Using the bar chart, how many times more carbon dioxide is in exhaled air than inhaled air?
Dr Dabour Hub Academy - figure 13
4 times
40 times
100 times
10 times
26.
Using the graph, how does air temperature affect sweat loss?
Dr Dabour Hub Academy - figure 14
Sweating stops above 25 °C
Temperature has no effect
Sweat loss falls as temperature rises
Sweat loss increases as temperature rises
27.
What is the fourth step in the flow chart?
Dr Dabour Hub Academy - figure 15
Waste enters the blood
The waste leaves the body
Cells make waste
The organ removes it from the blood
28.
Use the table. Which organ removes carbon dioxide?
Lungs
Bladder
Kidneys
Skin
29.
Use the table. Which is NOT an excretory process?
Skin releasing sweat
Lungs exhaling carbon dioxide
Large intestine passing faeces
Kidneys making urine
30.
Use the table. What happens if the liver fails?
Carbon dioxide poisons the blood
Constipation
The person overheats
Toxins remain in the blood
31.
Use the table. Which sample is most likely urine from a healthy person?
Sample 1
Sample 4
Sample 3
Sample 2
32.
Use the table. What is the mean volume of urine produced?
300 cm³
290 cm³
310 cm³
900 cm³
33.
Use the table. Which result is anomalous?
Student 4
Student 3
Student 1
Student 2
34.
Use the table. What is the missing volume of sweat?
200 cm³
100 cm³
500 cm³
800 cm³
35.
A student's notes contain one mistake. Which row?
Lungs - excrete carbon dioxide
Skin - releases sweat
Liver - makes urea
Kidneys - make urea
36.
In the drinking-water investigation, why should all students empty their bladders at the start?
To speed up digestion
To stop sweating
To make them thirsty
So that only urine made during the test is measured
37.
Why might volunteers in a sweat investigation be asked to wear similar clothes and do the same exercise?
To stop them breathing
To make them hotter
To control variables that affect sweating
To make urine clearer
38.
A student wants to test whether exercise affects the carbon dioxide in exhaled air. Which plan is best?
Hold your breath instead
Breathe out through the same volume of limewater before and after exercise and time how long it takes to turn milky
Use different limewater volumes each time
Test different people at rest only
39.
Which pairing of organ and waste removed is correct?
Kidneys - urea, excess water and salts
Large intestine - carbon dioxide
Lungs - urea
Skin - carbon dioxide only
40.
Match the term to its description: Urine
Water and salts lost through the skin
Undigested food
The gas breathed out
The liquid waste made by the kidneys, containing urea, water and salts
41.
The waste made in the liver from excess protein is _____.
fibre
glucose
oxygen
urea
42.
Passing out undigested food is called _____.
excretion
egestion
respiration
digestion
43.
The kidneys remove urea from the _____.
blood
skin
stomach
lungs
44.
The liver makes urea; the kidneys remove it. True or false?
False, the lungs remove urea
False, the kidneys make urea
False
True
45.
Carbon dioxide from respiration is excreted by the lungs. True or false?
False, by the kidneys
True
False
True, but only during exercise
46.
Egestion is a type of excretion. True or false?
False, egestion is breathing
False
True, faeces are metabolic waste
True
47.
Sweating excretes a little waste and cools the body. True or false?
False
True, but it warms the body
False, sweat contains no waste
True
48.
Eating a very high-protein diet will increase the urea made. True or false?
False, urea comes from fat
False, protein makes carbon dioxide only
True
False
49.
Urine passes out of the body through the urethra. True or false?
False, through the lungs
False
True
False, through the kidney
50.
A person with failed kidneys can live without any treatment. True or false?
False
True, if they drink more
True
True, the lungs take over
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Part of Unit 4: Maintaining life — see every lesson and quiz in this unit.
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