I) Answer the following Questions: (Long Answers)
1) Explain the process of digestion in humans.
2) Compare the functioning of alveoli in the lungs and nephrons in the kidneys with respect to
their structure and functioning.
3) Describe double circulation in human beings. Why is it necessary ?
II) Answer the following Questions: ( Short Answers)
1) What are the differences between autotrophic nutrition and heterorophic nutrition ?
2) What advantage over an aquatic organism does a terrestrial organism have with regard to
obtaining oxygen for respiration ?
3) Why is it necessary to separate oxygenated and decrygenated blood in mammals and birds ?
4) How is food transported in Plants ?
5) How is the amount of urine produced regulated ?
6) What would be the consequences of a deficiency of haemoglobin in our bodies ?
III) Fill in the Blanks
1) The energy produced during respiration is stored in the form of ATP which stands for ..
2) The liquid part of blood is called ..
3) Normal blood pressure (Systolic/diastolic)is...
4) The filtration units of Kidneys are called ..
IV) Draw a well labelled diagram of structure of Human Heart.
Answers
Answer:
1) Explain the process of digestion in humans.
= The human digestive system consists of the gastrointestinal tract plus the accessory organs of digestion (the tongue, salivary glands, pancreas, liver, and gallbladder). Digestion involves the breakdown of food into smaller and smaller components, until they can be absorbed and assimilated into the body.
2) Compare the functioning of alveoli in the lungs and nephrons in the kidneys with respect to
their structure and functioning.
=Alveoli are tiny balloon-like structures present inside the lungs. Nephrons are tubular structures present inside the kidneys. The walls of the alveoli are one cell thick and it contains an extensive network of blood capillaries. Nephrons are made of glomerulus, bowman's capsule, and a long renal tube.
3) Describe double circulation in human beings. Why is it necessary ?
= During a single cycle blood goes twice in the heart which is known as double circulation. It is necessary in human being to separate oxygenated and de-oxygenated blood because this makes their circulatory system is more efficient and helps in maintaining constant body temperature.
II) Answer the following Questions: ( Short Answers)
1) What are the differences between autotrophic nutrition and heterorophic nutrition.
=Autotrophs are organisms that prepare their own food through the process of photosynthesis, whereas heterotrophs are organisms that cannot prepare their own food and depend upon autotrophs for nutrition.?
2) What advantage over an aquatic organism does a terrestrial organism have with regard to
obtaining oxygen for respiration ?
=Terrestrial organisms breathe by using atmospheric oxygen whereas aquatic organism takes oxygen dissolved in water. A terrestrial animal has over an aquatic animal with regard to obtaining oxygen for respiration. It's because the air in the atmosphere contains the maximum amount of oxygen.
3) Why is it necessary to separate oxygenated and decrygenated blood in mammals and birds ?
=In birds and mammals have a double circulation system where both the oxygenated and deoxygenated blood maintains separate. ... They must separate oxygenated and de-oxygenated blood so that their circulatory system is more efficient and can maintain their constant body temperature.
4)How is food transported in Plants ?
=The phloem tissue in plants transports food materials from the leaves to different parts of the plant. The transportation of food in phloem is achieved by utilizing energy from ATP. As a result, the osmotic pressure in the tissue increases forcing the water to move through it.
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Answer:
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