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

Question # 1

What is counter-current multiplier.

Ans 1: This mechanism causes gradual osmotic out flow from the filtrate back to kidneys as it passes downward in the descending loop of Henle.Furthermore, ascending loop of henle does not allow out flow of water from its filtrate,instead actively transport sodium ions into kidney interstitium to sustain its high concentration.

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

Write a short note on kidney transplantation.

Ans 1: Dialysis is used temporerily.In high degree renal failure also called uremia or end stage renal disease.The dialysis is replaced by surgical transplantation of kidney of a matching donor kidney is the only option left as the permanent treatment. Kidney Should be of nearest to avoid tissue rejection.

Question # 4

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.

Question # 5

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

Ans 1: Synthesis function of liver include.
1. Synthesis of urea, ammonia and uric acid. It assists kidney for the removal of wastes.
2. Synthesis of plasma proteins like proteins like prothrombin and fibrinogen. it maintains osmotic balance of blood and help in blood clotting.

Question # 6

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 # 7

Give two adaptation of plants to high temperature condition.

Ans 1: Plants have following adaptations for surviving high temperature.
1. Plant synthesizes heat shock proteins and
2. Plants use evaporative cooling to manage with high temperature.

Question # 8

Why leaves are said to be excretophore?

Ans 1: The falling of yellow leaves in autumn is the seasonal time for the plants to get rid of the accumulated wastes and because of this reason leaves are said to be excretophore.

Question # 9

Give adaptation of marine fish for its survival in cold environment.

Ans 1: These fishes have a thick layer of insulting fat called blubber, which prevent excess heat loss from the body.

Question # 10

What is flame cell Why it is called so?

Ans 1: Flame cell is the part of excretory system of planaria.It is called flame cell because it has tuft of cilia, which looks like flickering flame of candle.

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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

What is counter-current multiplier.

Why ammonia is more toxic than other nitrogenous wastes?

Write a short note on kidney transplantation.

What is renal failure?

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

Differentiate between hydrophytes and mesophytes.

Give two adaptation of plants to high temperature condition.

Why leaves are said to be excretophore?

Give adaptation of marine fish for its survival in cold environment.

What is flame cell Why it is called so?

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

What is counter-current multiplier.

Why ammonia is more toxic than other nitrogenous wastes?

Write a short note on kidney transplantation.

What is renal failure?

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

Differentiate between hydrophytes and mesophytes.

Give two adaptation of plants to high temperature condition.

Why leaves are said to be excretophore?

Give adaptation of marine fish for its survival in cold environment.

What is flame cell Why it is called so?

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

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

What are heterotherms?Give example.

Define excretophore./what are excretophores %why?

Why leaves are said to be excretophore?

Write a short note on kidney transplantation.

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

Differentiate between osmoregulation and thermoregulation.

What is metanephridium?

Explain briefly glomerular filtrate.

Give two adaptation of plants to high temperature condition.

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

What are Xerophytes?Give its examples.

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

What is vasa recta?

Define Homeostasis.

Name waste products produced during metabolism of purine and pyrimidine.

Give the role of contractile vacuole.

Write a short note on kidney transplantation.

What are different metabolic wastes in humans?

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

Differentiate between hypotonic and hypertonic solution.

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

Give two adaptation of plants to high temperature condition.

Define anhydrobiosis with an example.

Differentiate between hypotonic and hypertonic solution.

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

Differentiate between ureotelic and uricotelic animals.

What are Xerophytes?Give its examples.

Name two hormones involved in nephron.

Explain briefly glomerular filtrate.

Differentiate between osmoregulation and thermoregulation.

What is counter-current multiplier.

12th Class Biology Chapter 15 Short Questions

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