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

Question # 1

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 # 2

Define Excretion.

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

Question # 3

Differentiate between osmoregulation and thermoregulation.

Ans 1: Osmoregulation: The mechanism of regulation, generally between organism and its environment of solute and the gain & loss of water is called osmoregulation.
Ans 2: Thermoregulation:The maintenance of body temperature within a tolerable range is called thermoregulation.

Question # 4

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 # 5

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 # 6

Name two hormones involved in nephron.

Ans 1: Anti diuretic hormone and Aldosterone are involved in nephron function.

Question # 7

What is hemodialysis and peritoneal dialysis?

Ans 1: Hemodialysis: mean cleaning of blood. In it blood is circulates through a machine which contains a dialyzer. Dialyzer has two spaces separated by thin membrane. Blood passes through one side of membrane and dialysis fluid from other side. The waste and excess water pass from the blood through the membrane into the dialysing fluid.
Ans 2: Peritoneal dialysis: work on same principle except abdomen has a peritoneal cavity, lined by a thin epithelium called peritoneum. Peritonial cavity is filled with dialysis fluid that enters the body through a catheter. Excess water and wastes pass through the peritoneum into the dialysing fluid.

Question # 8

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 # 9

Write four osmoregulatory adaptations in xerophytes.

Ans 1: They have following adaptations:
1. Sunken stomata
2. Thick cuticle
3. Water storing tissues
4. Reduced or complete absence of leaves.

Question # 10

Give four adaptation of xerophytes.

Ans 1: Xerophytes have following adaptations.
1. Reduced leaves
2. Hidden stomata
3. Thick cuticle
4. Water storing tissues

Latest Educational News Stories

Pakistan's Largest Database of Colleges and Universities

BS Programs

University Past Papers

University Results

Exam Results 2024

Study Abroad Programs and Opportunities for Pakistani Students

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

Why leaves are said to be excretophore?

Define Excretion.

Differentiate between osmoregulation and thermoregulation.

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

Write a short note on kidney transplantation.

Name two hormones involved in nephron.

What is hemodialysis and peritoneal dialysis?

Why ammonia is more toxic than other nitrogenous wastes?

Write four osmoregulatory adaptations in xerophytes.

Give four adaptation of xerophytes.

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

Why leaves are said to be excretophore?

Define Excretion.

Differentiate between osmoregulation and thermoregulation.

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

Write a short note on kidney transplantation.

Name two hormones involved in nephron.

What is hemodialysis and peritoneal dialysis?

Why ammonia is more toxic than other nitrogenous wastes?

Write four osmoregulatory adaptations in xerophytes.

Give four adaptation of xerophytes.

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

Write a short note on kidney transplantation.

Differentiate between osmoregulation and thermoregulation.

Why ammonia is more toxic than other nitrogenous wastes?

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

Define dialysis.Give its types.

Write four osmoregulatory adaptations in xerophytes.

What is hypercalcemia? Give its effects.

Explain briefly glomerular filtrate.

Differentiate between ureotelic and uricotelic animals.

Give the role of contractile vacuole.

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

Name waste products produced during metabolism of purine and pyrimidine.

What is hemodialysis and peritoneal dialysis?

What are different metabolic wastes in humans?

Write a short note on kidney transplantation.

Give two adaptation of plants to high temperature condition.

Write four osmoregulatory adaptations in xerophytes.

What are juxtamedullary nephrons?

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

Differentiate between hydrophytes and mesophytes.

What are heterotherms?Give example.

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

What is hemodialysis and peritoneal dialysis?

Differentiate between ureotelic and uricotelic animals.

Name waste products produced during metabolism of purine and pyrimidine.

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

Define the process of painting with one example.

Differentiate between hydrophytes and mesophytes.

What are juxtamedullary nephrons?

What are different metabolic wastes in humans?

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

Define anhydrobiosis with an example.

12th Class Biology Chapter 15 Short Questions

Is this page helpful?