Question

Answer all the six questions.
Define respiration.
how do fishes take in oxygen and circulate it?
What is the role of pigment in large animals to take up o2 and release CO2
Why is smoking injurious to health?
Mention the factors required for gaseous exchange
What's the role of highly vascularised nasal cavity?

Answer 1

Answer:

1. the action of breathing.
2. A fish can respire through gills.. body parts work like a pump to keep water moving over the gas absorption surfaces of the gills.
3. Because respiratory pigments are major blood buffers, they play major roles in carbon dioxide transport.
4. Smoking can cause lung disease by damaging your airways and the small air sacs (alveoli) found in your lungs. Lung diseases caused by smoking include COPD, which includes emphysema and chronic bronchitis.
5. The nasal passages are highly vascularised, have fine hairs and mucus secreting cells, so that the inspired air gets warmed, moistened and becomes dust free.

Explanation:

Hope it's help you dear

Answer 2

Question1:- Define respiration.

Answer:- Respiration is the bio-chemical catabolic, enzymatic process that takes place in presence or absence of oxygen inside a cell and helps to release energy in the form of ATP.

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Question 2:- How do fishes take in oxygen and circulate it?

Answer:-

• Fisehes takes in oxygen through mouth via water.

• The water is passed through its gills where the dissolved oxygen is taken up by blood.

• This oxygenated blood moves to all parts of the fishe's body.

• The deoxygenated blood from the body is received by their two chambered heart and is pumped to the gills for oxygenation.

• Then the oxygenated blood is circulated through out the body.

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Question 3:- What is the role of pigment in large animals to take up o2 and release CO2?

Answer :-

• The respiratory pigment, haemoglobin has a important role in transportation of glasses. It is present in the RBSs and have a night affinity for oxygen.

• The haemoglobin binds with oxygen to form oxygaemoglobun and transports it to all body parts.

• CO2 is more soluble in water and thus 70% of CO2 is transported in form of bi-carbonate in dissolved form.

• 23% of CO2 is transported in the form of Carbaminoharmoglobin after binding with the pigment.

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Question 4:- Why is smoking injurious to health?

Answer:- Smoking releases CO which has a very high affinity for haemoglobin. CO combines with haemoglobin to form carboxyhaemoglobin and as a result the oxygen can not combine with the haemoglobin anymore. As the result the person may die due to insufficient supply of oxygen.

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Question 5:- Mention the factors required for gaseous exchange.

Answer:-

For smooth gaseous exchange:-

• Surface needs to be clean.

• The respiratory surface should be moist and should have a large surface area.

• The respiratory surface should be richly supplies with blood l vessels.

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Question 6 :- What's the role of highly vascularised nasal cavity?

Answer:- The two nasal cavities have epithelium with mucus secreting glands. These glands function as air conditioner thereby helping to equalise the temperature of air with the body temperature.

The hairs present in nasal cavity also helps to filter the air.