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ROYAL PUBLIC SCHOOL
SECTOR – IV / B.S.CITY / SESSION 2016 -17
ASSIGNMENT WORK
Class – VII
Sub – Science
Topic –9.RESPIRATION IN PLANTS AND ANIMALS
MULTIPLE CHOICE QUESTIONS
1. In insects, air enters the body through
a. Lungs
b. gills
c. skin
d. spiracles
2. During heavy exercise, we get cramps in the legs due to accumulation of
a. Alcohol
b. lactic acid
c. water
d. carbon dioxide
3. During exhalation, the ribs move
a. Upwards
b. downwards
c. outwords
d. to normal position
4. Plants breathe through their stomata located in their
a. Leaves
b. stem
c. roots
d. flowers
5. Gills are respiratory organs in
a. Fish
b. cockroach
c. amoeba
d. earthworm
6. The food that provides us with quick energy is
a. Starch
b. glucose
c. protein
d. fat
7. No energy is released during
a. Exhalation
b. breathing c. inhalation d. all of these
8. Exchange of gases takes place during ……………………. .
a. Respiration
b. circulation
c. breathing
d. transpiration
9. The number of ATP molecules produced during anaerobic respiration is
a. 20 molecules b. 38 molecules
c. 2 molecules
d. 382 molecules
10. The end products of aerobic respiration are
a. CO2 and H2O + 38 ATP
b. CO2and O2 + 2 ATP
c. CO2and glucose
d. CO2 and H2O + 2 ATP
11. …………………… is the common passage for air and food in humans.
a. Larynx
b. pharynx
c. trachea
d. epiglottis
12. The right lung is
a. Two lobed
b. one lobed
c. three lobed
d. no lobed
13. During inspiration, the ribcage moves
a. Upward and outward
b. downward only
c. inward and downward
d. inward only
14. What is the average breathing rate in a new born baby?
a. 25 times per minute
c. 18 times per minute
b. 12 times per minute
d. 60 times per minute
15. Gaseous exchange in plants takes place by which of the following process?
a. Osmosis
b. diffusion
c. transpiration
d. absorption
16. The small air holes on the body surface of insect is called
a. Tracheoles
b. spiracles
c. trachea
d. gills
17. Which of the following is not associated with the process of respiration?
a. Lungs
b. alveoli
c. gall bladder
d. trachea
18. Accumulation of ……….. in the muscle cells causes muscle cramps.
a. Glacial acid b. acetic acid c. lactic acid
d. nitric acid
19. In fish, exchange of gases takes place through ……………………. .
a. Lungs
b. spiracles
c. body skin
d. gills
20. Tracheae are present in a/an ………………….. .
a. Frog
b. fish
c. earthworm
d. insect
21. We can hold our breath only for a few …………………….. .
a. Seconds
b. hours
c. days
d. years
22. Alcohol is formed in ……………….. respiration.
a. Aerobic
b. anaerobic c. cellular
d. leaf
23. As the air passes through the nasal cavity, it becomes ……………… .
a. Cold
b. very cold
c. warm
d. hot
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24. Normal range of breathing rat in an average adult person at rest is ………………….. .
a. 9-12
b. 15-18
c. 21-24
d. 30-33
25. In cockroaches, air enters the body through ……………………. .
a. Lungs
b. gills
c. spiracles
d. skin
26. During exhalation, the ribs …………………. .
a. Move outward
b. move upwards
c. spiracles
d. do not move at all
MATCH THE FOLLOWING:
Column A
Column B
1. Yeast
a. red blood cells
2. Stomata
b. chest cavity
3. Larynx
c. man
4. Diaphragm
d. voice box
5. Gills
e. plants
6. Oxyhaemoglobin
f. fish
7. Lungs
g. alcohol
8. Yeast
h. dome-shape
9. Diaphragm
i. inhalation
10. Moist skin
j. inhale-exhale
11. Stomata
k. fermentation
12. Breathing
l. cockroach
13. Chest cavity enlarge
m. earthworm
14. Air holes
n. diffusion
15. Yeast
o. gills
16. Diaphragm
p. stomata
17. Leaves
q. chest cavity
18. Fish
r. anaerobic respiration
19. Moist skin
s. lungs and moist skin
20. Frog
t. earthworm
FILL IN THE BLANKS.
1. …………………….. respiration takes place into the presence of oxygen.
2. The leaves of plants have small pores called ……………….. .
3. The larynx is also called the ………………… .
4. The small thin walled air sacs inside the lungs are called ……………….. .
5. The oxygen carrying pigment in the blood is …………………… .
6. The cause of muscle cramp in ……………… respiration.
7. ………………….. is an anaerobe.
8. …………… is the pigment carrying oxygen from lungs to cells.
9. Wine and been are made by the process of ………………… .
10. During respiration, energy is released in the form of ……………………… .
11. ………………. Is also called voice box.
12. The breaking down of glucose into carbon dioxide and water occurs in ……………
respiration.
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13. The lungs contain millions of …………. Through which exchange of gases takes place.
14. An allergic response which causes air passage to be narrowed is called ………….. .
15. Breathing rate is ………………….. during an exercise.
16. The thin walls of alveoli are richly supplied with………………….. .
17. The number of times a person breathes in a minute is called ………………….. .
18. The trachea branches into two thinner tubes called ……………………. .
19. The living organisms carrying out aerobic respiration are called ……………… .
20. During inhalation, the diaphragm contracts and moves …………………… .
21. After heavy exercise, we sometimes get muscle …………………. .
22. Oxygen combines with the hemoglobin in the blood to form ………………. .
STATE TRUE OF FALSE.
1. We inhale through our nostrils.
2. Breathing is a physical process.
3. Aerobic respiration releases lesser amount of enaerobic respiration.
4. Epiglottis is a common passage for food pipe and windpipe.
5. Plants take in oxygen only during the day.
6. When you blow out air through lime water, it turns milky.
7. At rest, the breathing rate of a new born will be less than that of an adult.
VERY SHORT ANSWER QUESTIONS.
1. Define tidal volume
2. Why do we breathe faster while doing some heavy exercise?
3. Name the system by which insects respire.
4. In which part of the lung does exchange of gases take place?
5. Name the animals which respire by gills, skin and trachea.
6. With the help of a simple equation show the process of respiration.
7. Why it the collour of the blood red?
8. How do living organisms obtain energy for their activities?
9. What is the effect of exhaled air on lime water?
10. What is breathing rate?
11. Name the products formed as a result of aerobic respiration.
12. How many molecules of ATP are generated during aerobic respiration?
13. How is trachea prevented from collapsing?
14. Which part of the skeletal system supports the lung?
15. How is inhaled air different from exhaled air?
16. What are gills?
17. Name an animal which breathes through (a) tracheae, (b) gills, (c) skin and (d) lungs
18. What do woody stems have for gaseous exchange?
19. What is the type of respiration called which can occur without oxygen?
20. Name the small openings (holes) on the sides of the body of an insect?
21. Name the breathing organ in fish.
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22. Name any two parts of plant used for exchange of gases other than leaves.
23. What happens to your breathing rate when you go to sleep?
24. How do we get relief from muscle cramps?
SHORT ANSWER QUESTIONS.
1. Define respiration. Give two different ways in which respiration is carried out.
2. Why do our body cells require oxygen?
3. What is anaerobic respiration?
4. Why does an athlete breathe faster and deeper than usual after finishing the race?
5. What is tidal volume of air?
6. Do we also respire anaerobically?
7. Name the products formed as a result of aerobic respiration.
8. Name the respiratory organ in the following organisms:
Amoeba, earthworm, fish and frog.
9. Distinguish between breathing and respiration.
10. What are the various organs comprising the human respiratory system.
11. Suggest two ways how respiration is different from photosynthesis.
12. What is anaerobic respiration? Write the word equation for the process.
13. Why sudden exercise leads to muscular cramps?
14. What is fermentation?
15. How does nasal chamber help in the process of breathing?
16. On what factors does the breathing rate depend?
17. Explain the structure of human lungs in three-four sentences.
18. Why are deep breathing exercises good for health?
19. What happens to the ribs during inhalation?
20. What is meant by inhalation and exhalation?
21. Why does breathing become faster during exercise?
22. What is meant by respiration?
23. Why do we sneeze when we inhale a lot of dust-laden air?
24. Why does an athlete breathe faster and deeper than usual after finishing the race?
25. Give the differences between breathing and cellular respiration.
26. Give the differences between aerobic and anaerobic respiration.
27. How will you show that, air we breathe out contains water vapour?
28. Explain the process of respiration in the roots of a plant.
29. Nitika is practicing for the upcoming athletic championship. Suddenly, while running, she
sits down and starts crying because of pain in her legs. Monika, immediately brings a
bucket having hot water for her.
a. Why did Nitika suddenly feel the pain in her legs while running?
b. What value should you learn from Monika?
LONG ANSWER QUESTIONS.
1. Describe the mechanism of breathing in humans.
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2. What is aerobic respiration? Explain the process giving appropriate equations.
3. Distinguish between aerobic and anaerobic respirations.
4. Explain the three basic requirements of respiration.
5. Draw the respiratory system of humans. Label the important parts
6. Amphibians are not regarded as true lung breathers. Explain.
7. State four differences between inspiration and expiration.
8. How do plants respire? Draw a labeled diagram of the structure that enables the process.
9. Draw a well-labelled diagram of human respiratory system. In which part of lungs does
exchange of gases take place?
10. With the help of a diagram, show exchange of gases in the alveolus.
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