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

Question # 1

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 # 2

What are Xerophytes?Give its examples.

Ans 1: Plant which grow under drought or in extreme shortage of water theses plants are called xerophytes. E.g, Cacti, Opuntia, Calatropis.

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

Define the process of painting with one example.

Ans 1: It is structural adaptation for heat regulation in dogs.Panting is evaporative cooling in the respiratory tract for temperature regulation.

Question # 6

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 # 7

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 # 8

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

Ans 1: The more concentrated external environment is called hypertonic environment. The hypertonic environment makes the cell solution concentrated and cell shrinks due loss of water.

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 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.

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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 hemodialysis and peritoneal dialysis?

What are Xerophytes?Give its examples.

Define Excretion.

Differentiate between hydrophytes and mesophytes.

Define the process of painting with one example.

Define Homeostasis.

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

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

Define dialysis.Give its types.

What is counter-current multiplier.

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 hemodialysis and peritoneal dialysis?

What are Xerophytes?Give its examples.

Define Excretion.

Differentiate between hydrophytes and mesophytes.

Define the process of painting with one example.

Define Homeostasis.

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

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

Define dialysis.Give its types.

What is counter-current multiplier.

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

What is renal failure?

What is flame cell Why it is called so?

What are heterotherms?Give example.

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

Define dialysis.Give its types.

Name two hormones involved in nephron.

What is metanephridium?

Described the structure of a flame cell.

Give the role of contractile vacuole.

What is hypercalcemia? Give its effects.

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

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

What is hypercalcemia? Give its effects.

Write four osmoregulatory adaptations in xerophytes.

What are juxtamedullary nephrons?

What is hemodialysis and peritoneal dialysis?

Give two adaptation of plants to high temperature condition.

What is counter-current multiplier.

What are different metabolic wastes in humans?

Define the process of painting with one example.

Write a short note on kidney transplantation.

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

Define dialysis.Give its types.

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

What is lithotripsy?

Name two hormones involved in nephron.

Write a short note on kidney transplantation.

Give the role of contractile vacuole.

What are different metabolic wastes in humans?

Define anhydrobiosis with an example.

What is renal failure?

Give four adaptation of xerophytes.

12th Class Biology Chapter 15 Short Questions