CBSE Class 10 Biology Life Processes Respiration In Animals Worksheet

Official Class 10 Science Worksheets: Chapter 05 Life Processes

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Chapter-wise Practice Material: Chapter 05 Life Processes

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BIOLOGY- RESPIRATION IN ANIMALS- REFERENCE MATERIALS
 
Respiration- The process by which digested food is broken down with the help of Oxygen to release energy.
 
(i) Gaseous exchange : Intake of oxygen fromthe atmosphere and release of carbondioxide.
 
(ii) Breakdown of simple food in order to release energy inside the CellularRespiration
 
 
 CBSE Class 10 Biology Life ProcessesRespiration In Animals Worksheet 1
 
respiration- (i) Aerobic respiration (ii) Anaerobic respiration
CBSE Class 10 Biology Life ProcessesRespiration In Animals Worksheet 2
 
o Some common features of Respiratory organs-
 
(i) Large surface area- for greater rate of diffusion of respiratory gases.
 
(ii) Thin permeable walls – to ensure easy diffusion & exchange of gases.
 
(iii) Extensive blood supply- Respiratory organs are richly supplied with blood vessels for quick transport of gases.
 
o Gaseous exchange in plants-
 
• Process – Diffusion
 
• Direction of diffusion depends on- (i) Environmental conditions
 
(ii) Requirement of the plant.
 
•  Day time- Carbon dioxide given out during respiration is used for photosynthesis.
 
Therefore only Oxygen is released, which is a major activity during the day.
 
• Night time – Only respiration takes place. Therefore only Carbon dioxide is released, which is a major activity during the night.
 
o Gaseous exchange in animals-
 
Terrestrial animals- take Oxygen from the atmosphere.
 
Aquatic animals- take Oxygen dissolved in water. (Oxygen content is low in water, therefore they breathe faster.
 
o Human Respiratory system-
 
External nostrils → Nasal cavity → Trachea→ Bronchi → Bronchioles →Alveoli
 
Rings of cartilage present in the throat ensure that the trachea (air passage) does not collapse when there is less air in it.
 
Lungs – (i) Present in the thoracic cavity.
 
(ii) They are spongy, elastic bags consisting of Bronchi, Bronchioles and Alveoli
 
Refer to figure 6.9 page no. 104 of N.C.E.R.T Text book)
 
o Respiration occurs in two phases
 
(i) External-Breathing, which is a mechanical process.
 
(ii) Internal - Cellular respiration
 
o Mechanism of breathing – It includes : (i)Inhalation (ii) Exhalation
 
o Exchange of gases-
 
Unicellular organisms- By Diffusion
 
Animals- (i) As the body size is large, diffusion alone is not enough.
 
(ii) Respiratory pigments also required.
 
(iii) Respiratory pigment in human beings is Hemoglobin, which is present in red blood corpuscles.
 
(iv) It has very high affinity for Oxygen.
 
(iv) Carbon dioxide is more soluble in water than Oxygen, so it Gets dissolves in blood and is thus transported.
CBSE Class 10 Biology Life ProcessesRespiration In Animals Worksheet 3
 
Respiration in Plants : Respiration in plants is simpler than the respiration in animals.Gaseous exchange occur through
1. Stomata in leaves
2. Lenticels in stems
3. General surface of the roots
 

Question. Whales respire through :
(A) Lungs
(B) Gills
(C) Moist skin
(D) Buccal cavity
Answer : A

Question. Lining of trachea is made of :
(A) Simple squamous epithelium
(B) Simple cuboidal epithelium
(C) Pseudostratified epithelium
(D) Stratified cuboidal epithelium
Answer : C

Question. Fruits kept in refrigerator maintain their flavour and taste for longer period due to :
(A) Non - availability of O2
(B) Presence of excess CO2
(C) Slowing down of respiration
(D) Presence of excess moisture
Answer : B

Question. No respiratory pigment is found in :
(A) Cockroach
(B) Earthworm
(C) Rabbit
(D) Frog
Answer : A

Question. The shortest part of respiratory system is
(A) Trachea
(B) pharynx
(C) Larynx
(D) Bronchi.
Answer : B

Question. The pyruvic acid formed during glycolysis is oxidised to CO2 and H2O in a cycle called
(A) Calvin cycle
(B) nitrogen cycle
(C) Hill cycle
(D) Krebs' cycle
Answer : D

Question. Cardiac notch is found on :
(A) Right lung
(B) Left lung
(C) Diaphragm
(D) None of the above
Answer : B

Question. During inspiration, air passes into lungs due to :
(A) Increase in volume of thoracic cavity and fall in lung pressure
(B) Fall in pressure inside the lungs
(C) Increased volume of thoracic cavity
(D) Muscular expansion of lungs
Answer : A

Question. Which reaction take place in Mitochondria ?
(A) Oxidative phosphorylation
(B) Photolysis
(C) Photophosphorylation
(D) Starch synthesis
Answer : A

Question. Kreb’s Cycle takes place in : 
(A) Cytoplasm
(B) Mitochondria
(C) Nucleus
(D) Ribosome
Answer : B

Question. R.Q. for glucose is
(A) 1
(B) 0.5
(C) 2
(D) 0.05
Answer : A

Question. Anaerobic respiration in human body occurs inside :
(A) Liver
(B) White muscles
(C) Red muscles
(D) Kidney
Answer : D

Question. Rings of cartilage are present in the following :
(A) Oesophagus
(B) Trachea
(C) Throat
(D) Duodenum
Answer : B

Question. Which scientist discovered “Tricarboxylic acid” cycle ? 
(A) Krab
(B) Watson and Crick
(C) Sanger
(D) Edison
Answer : A

Question. The lungs of early bony fishes evolved into swim bladders. This change had the primary effect of :
(A) Improving feeding efficiency
(B) Supplementing gill respiration
(C) Aiding reproduction
(D) Providing buoyancy
Answer : D

Question. Higher concentration of CO2 causes :
(A) Low transport of O2 in blood
(B) Low diffusion of O2 in blood
(C) Quick diffusion of O2
(D) All of these
Answer : C

Question. EMP is _______.
(A) Glycolysis
(B) Kreb’s cycle
(C) ETS
(D) Fermentation
Answer : A

Question. The end product of glycolysis is :
(A) Phosphoric acid
(B) Malic acid
(C) Pyruvic acid
(D) Fumaric acid
Answer : C

Question. The sequence of process related with respiration is
(A) Kreb’s cycle Glycolysis Electrontransport system
(B) Glycolysis Kreb’s cycle Electrontransport system
(C) Electrontransport system Kreb’s cycle Glycolysis
(D) None of above
Answer : B

Question. During lack of oxygen in tissues of our body, the pyruvate is converted into lactic acid in :
(A) Mitochondria
(B) Nucleus
(C) Cytoplasm
(D) Ribosome
Answer : C

Question. Where is the Gaseous exchange takes place during respiration in human being ?
(A) Alveoli
(B) Pharynx
(C) Larophaynx
(D) Trachea
Answer : A

 

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Practice Worksheet and Study Resources for Class 10 Science Chapter 05 Life Processes

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