Fsc part 2 online preparation for biology chapter 15 (Homeostasis)

Question # 1

Illustrate the function of Malpighian Tubules.

Ans 1: Malpighian tubules extracted waste products from the haemolymph of insects and they pour it into digestive tract, where they are converted into nitrogenous wastes

Question # 2

Why ammonia is more toxic than other nitrogenous wastes?

Ans 1: Ammonia is very toxic and dissolve quickly in body fluids,Thus it must be kept in low concentration in the body.To maintain low concentration below that of body requires, large volume of water is used to eliminate it as urine.

Question # 3

Define Excretion.

Ans 1: Removal of waste products (especially nitrogenous wastes) from the body is called excretion.

Question # 4

Differentiate between hydrophytes and mesophytes.

Ans 1: Hydrophytes: Hydrophytes are the plant which grow in aquatic environment (abundant water),they have large leave surface area and stomata are present on the upper side of leaves, they have high rate of transpiration. E.g., Water lilli, Wolfia, Pistia etc.
Ans 2: Mesophytes: These are the plants which grow on land where moderate water is available: they open their stomata during flooding and close stomata during drought.For Example: rose and mango.

Question # 5

Give the role of contractile vacuole.

Ans 1: Contractile vacuole play an important tole in osmoregulation in aquatic animals, it absorbs extra water from the cell and excerta it out.For example in paramecium two contractile vacuoles are present, which perform osmoregulatory function.

Question # 6

What is vasa recta?

Ans 1: In juxtamedullary nephrons additional capillaries extend down to from a loop of vessels called vasa reata.

Question # 7

Define Homeostasis.

Ans 1: The protection of internal environment from the harms of fluctuation in external environment is called homeostasis.The homeostasis keeps the internal fluctuation in a narrow range with various control systems compared to wider external fluctuation. The control system would not let the body flooded with water in abundant supply of water.

Question # 8

Described the structure of a flame cell.

Ans 1: It is a complete eukaryotic cell.It has a unucles, other cell organelles and a cavity where the waste products are collected.Each flame cell has a tuft of cilia, whose beating propel interstitial fluid into the tubular system

Question # 9

Define dialysis.Give its types.

Ans 1: When the kidneys of a patient are failed then nitrogenous wastes are removed by filtering blood through dialysis.Dialyzing machine is called artificial kidney machine.
It has two types:
1. Peritoneal dialysis
2. Hemodialysis

Question # 10

What is renal failure?

Ans 1: When kidneys perform no more function and cannot filter blood to produce nitrogenous waste, this is called renal failure or uemia.

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Fsc part 2 online preparation for biology chapter 15 (Homeostasis)

Online Short Questions For Chapter 1 "12th Class Biology Chapter 15 Short Questions Preparation "

Biology - 12th Class Biology Chapter 15 Short Questions Preparation

Illustrate the function of Malpighian Tubules.

Why ammonia is more toxic than other nitrogenous wastes?

Define Excretion.

Differentiate between hydrophytes and mesophytes.

Give the role of contractile vacuole.

What is vasa recta?

Define Homeostasis.

Described the structure of a flame cell.

Define dialysis.Give its types.

What is renal failure?

Prepare Complete Set Wise Questions For Chapter 1 "12th Class Biology Chapter 15 Short Questions Preparation "

Set 1

Set 2

Set 3

Set 4

12th Class Biology Chapter 15 Short Questions Preparation - Set 1

Illustrate the function of Malpighian Tubules.

Why ammonia is more toxic than other nitrogenous wastes?

Define Excretion.

Differentiate between hydrophytes and mesophytes.

Give the role of contractile vacuole.

What is vasa recta?

Define Homeostasis.

Described the structure of a flame cell.

Define dialysis.Give its types.

What is renal failure?

12th Class Biology Chapter 15 Short Questions Preparation - Set 2

Differentiate between hydrophytes and mesophytes.

Write four osmoregulatory adaptations in xerophytes.

Differentiate between osmoregulation and thermoregulation.

Why leaves are said to be excretophore?

What are effects of ADH and Aldosterone on work of nephron?

What is metanephridium?

What are heat-shock proteins?

Name waste products produced during metabolism of purine and pyrimidine.

Give the role of contractile vacuole.

Define the process of painting with one example.

12th Class Biology Chapter 15 Short Questions Preparation - Set 3

What are heterotherms?Give example.

Write four osmoregulatory adaptations in xerophytes.

Define excretophore./what are excretophores %why?

Differentiate between ureotelic and uricotelic animals.

What is vasa recta?

Described the structure of a flame cell.

Write structural adaptation for regulation of heat exchange between animals and environment.

Illustrate the function of Malpighian Tubules.

Give four adaptation of xerophytes.

Give two adaptation of plants to high temperature condition.

12th Class Biology Chapter 15 Short Questions Preparation - Set 4

Write two types of synthesis functions of liver and effects on homeostasis.

Give two adaptation of plants to high temperature condition.

Define Excretion.

Differentiate between hydrophytes and mesophytes.

What are heat-shock proteins?

Give four adaptation of xerophytes.

What is hypertonic environment and what changes occur in a cell in such environment?

Write a short note on kidney transplantation.

Write four osmoregulatory adaptations in xerophytes.

What are effects of ADH and Aldosterone on work of nephron?

12th Class Biology Chapter 15 Short Questions

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