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

Question # 1

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 # 2

Define excretophore./what are excretophores %why?

Ans 1: Leaves are called excretophore because they collect nitrogenous waste from different plant parts and they store temporarily, at autumn season plants shed their leaves and wastes are removed from plant body.

Question # 3

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 # 4

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 # 5

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 # 6

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 # 7

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 # 8

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 # 9

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 # 10

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.

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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

Define dialysis.Give its types.

Define excretophore./what are excretophores %why?

What are Xerophytes?Give its examples.

What is flame cell Why it is called so?

What is counter-current multiplier.

What is hemodialysis and peritoneal dialysis?

Why leaves are said to be excretophore?

Give two adaptation of plants to high temperature condition.

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

Differentiate between osmoregulation and thermoregulation.

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

Define dialysis.Give its types.

Define excretophore./what are excretophores %why?

What are Xerophytes?Give its examples.

What is flame cell Why it is called so?

What is counter-current multiplier.

What is hemodialysis and peritoneal dialysis?

Why leaves are said to be excretophore?

Give two adaptation of plants to high temperature condition.

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

Differentiate between osmoregulation and thermoregulation.

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

What are heat-shock proteins?

Define the process of painting with one example.

Write four osmoregulatory adaptations in xerophytes.

Differentiate between hydrophytes and mesophytes.

Differentiate between hypotonic and hypertonic solution.

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

Name waste products produced during metabolism of purine and pyrimidine.

What is flame cell Why it is called so?

Define Excretion.

What is hypercalcemia? Give its effects.

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

Why leaves are said to be excretophore?

What is hypercalcemia? Give its effects.

What is metanephridium?

Define anhydrobiosis with an example.

Differentiate between ureotelic and uricotelic animals.

What is flame cell Why it is called so?

What are juxtamedullary nephrons?

Name two hormones involved in nephron.

Differentiate between hydrophytes and mesophytes.

Give the role of contractile vacuole.

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

Define Excretion.

What is flame cell Why it is called so?

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

Define Homeostasis.

Differentiate between hydrophytes and mesophytes.

Name two hormones involved in nephron.

Give four adaptation of xerophytes.

What is lithotripsy?

What is hemodialysis and peritoneal dialysis?

What are different metabolic wastes in humans?

12th Class Biology Chapter 15 Short Questions

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