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

Question # 1

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 # 2

What is vasa recta?

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

Question # 3

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 # 4

Give four adaptation of xerophytes.

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

Question # 5

Differentiate between ureotelic and uricotelic animals.

Ans 1: Ureotelic Animals: Animals which excrete urea are called ureotelic e.g sharks.
Ans 2: Uricotelic Animals: Animals which excrete uric acid are called Uricotelic.e.g Birds, insects.

Question # 6

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 # 7

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 # 8

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.

Question # 9

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 # 10

What are heterotherms?Give example.

Ans 1: These are the animals that are capable of varying degrees of endothermic heat production but generally do not regulate their body temperature within a narrow range.For example bats and humming birds.

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

Differentiate between osmoregulation and thermoregulation.

What is vasa recta?

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

Give four adaptation of xerophytes.

Differentiate between ureotelic and uricotelic animals.

Define dialysis.Give its types.

Why ammonia is more toxic than other nitrogenous wastes?

What is flame cell Why it is called so?

Differentiate between hydrophytes and mesophytes.

What are heterotherms?Give example.

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

Differentiate between osmoregulation and thermoregulation.

What is vasa recta?

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

Give four adaptation of xerophytes.

Differentiate between ureotelic and uricotelic animals.

Define dialysis.Give its types.

Why ammonia is more toxic than other nitrogenous wastes?

What is flame cell Why it is called so?

Differentiate between hydrophytes and mesophytes.

What are heterotherms?Give example.

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

Described the structure of a flame cell.

What is vasa recta?

What is renal failure?

Differentiate between hypotonic and hypertonic solution.

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

What is metanephridium?

What is hypercalcemia? Give its effects.

Why ammonia is more toxic than other nitrogenous wastes?

Differentiate between hydrophytes and mesophytes.

Give four adaptation of xerophytes.

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

Differentiate between ureotelic and uricotelic animals.

What are heterotherms?Give example.

What are juxtamedullary nephrons?

Define Homeostasis.

What is renal failure?

Why leaves are said to be excretophore?

What is lithotripsy?

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

Differentiate between hydrophytes and mesophytes.

Define excretophore./what are excretophores %why?

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

Differentiate between hydrophytes and mesophytes.

What is flame cell Why it is called so?

What is metanephridium?

Differentiate between osmoregulation and thermoregulation.

Define excretophore./what are excretophores %why?

Give four adaptation of xerophytes.

Write four osmoregulatory adaptations in xerophytes.

What is hemodialysis and peritoneal dialysis?

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

What are heat-shock proteins?

12th Class Biology Chapter 15 Short Questions

Is this page helpful?

Share your comments & questions here