Excretory Systems in Different Organisms

Q.

The body cells in cockroach discharge their nitrogenous waste in the haemolymph mainly in the form of

1. Urea

2. Calcium carbonate

3. Potassium urate

4. Ammonia

Q.

What are ammonotelic animals?

Q.

Desert animals have a long loop of Henle

1. There will be no urine formation

2. There will be hardly any change in the quality of urine formed

3. The urine will be more dilute

4. The urine will be more concentrated

Q.

What are ureotelic animals?

Q. Consider the following four statements (i)-(iv) about certain desert animals such as kangaroorat
(i) They have dark colour and high rate of reproduction and excrete solid urine
(ii) They do not drink water, breathe at a slow rate to conserve water and have their body covered with thick hairs
(iii) They feed on dry seeds and do not required drinking water
(iv) They excrete very concentrated urine and do not use water to regulate body temperature.
Out of these four, which two are correct:

1. (i) and (ii)
2. (ii) and (iii)
3. (iii) and (iv)
4. (iii) and (i)

Q.

Uric acid is the chief nitrogenous component of the excretory products of?

1. Man

2. Frog

3. Cockroach

4. Earthworm

Q.

Identify the glands that perform the excretory function in prawns.

Q.

Are frogs ureotelic?

Q.

How many of the following animals in the given box are ureotelic?

Frog

Pigeon

Lizards

Humans

Cockroach

Q.

Why is ammonia toxic?

Q.

Uric acid is the chief nitrogenous component of excretory product of cockroaches.

1. earthworm

2. man

3. cockroach

4. frog

Q.

Name the following:

(a) A chordate animal having flame cells as excretory structures

(b) Cortical portions projecting between the medullary pyramids in the human kidney

(c) A loop of capillary running parallel to the Henle’s loop.

Q. Almost all the aquatic animals excrete ammonia as the nitrogenous waste product. Which of the following statements is not in agreement with this situation?

1. Ammonia is highly toxic and needs to be eliminated as and when formed
2. Ammonia gets converted into a less toxic form called urea
3. Ammonia is easily soluble in water
4. Ammonia is released from the body in a gaseous state

Q. Read the statements given below regarding regulators and select the correct option.

Statement 1: The success of mammals is due to their ability to maintain a constant body temperature

Statement 2: Only mammals are capable of thermoregulation.

1. Both the statements (1 and 2) are correct
2. Both the statements (1 and 2) are incorrect
3. Statement 1 is correct while statement 2 is incorrect
4. Statement 2 is correct while statement 1 is incorrect

Q.

Name the organ that helps in nutrition in Hydra?

Q.

Distinguish between the following

(a) Prostomium and peristomium

(b) Septal nephridium and pharyngeal nephridium

Q.

What is the excretory structure in Amoeba?

Q.

What are flame cells?

Q. In which of these animals, antennal gland functions as excretory organ?

1. Cockroach
2. Planaria
3. Prawn
4. Earthworm

Q. Which of the following organisms have green glands as a part of their excretory system ?

1. Cray fish
2. Prawns
3. Lobster
4. All of the above

Q. In which of these animals, antennal gland functions as excretory organ?

1. Planaria
2. Cockroach
3. Prawn
4. Earthworm

Q. Match the following and choose the correct option :
$\begin{array}{cc}\text{A. Earthworms}& \text{1. Malpighian tubules.}\\ \text{B. Human beings}& \text{2. Nephridia}\\ \text{C.}Planaria& \text{3. Kidneys}\\ \text{D. Cockroach}& \text{4. Flame cells}\end{array}$

1. A-4, B-3, C-2, D-1
2. A-1, B-3, C-2, D-4
3. A-2, B-3, C-4, D-1
4. A-3, B-1, C-2, D-4

Q. Earthworms are:

1. Uricotelic when plenty of water is available
2. Ammonotelic when plenty of water is available.
3. Uricotelic under conditions of water scarcity
4. Ureotelic when plenty of water is available

Q. Arrange the following on the basis of evolution of excretory structure.
Nephridia, Protonephridia, Kidneys, Malphigian tubules, Green glands.

1. Protonephridia, Nephridia, Kidneys, Malphigian tubules, Green glands
2. Nephridia, Protoephridia, Green glands, Kidneys, Malphigian tubules
3. Protonephridia, Nephridia, Malphigian tubules, Green glands, Kidneys.
4. Nephridia, Protonephridia, Malphigian tubules, Green glands, Kidneys.

Q.

Terrestrial amphibians and marine fishes are

Q.

Are humans ammonotelic?

Q. In annelids, excretory organs are

1. Nephridia
2. Malpighian tubules
3. Green glands
4. Kidneys

Q. Choose the correct statement for Periplaneta americana.

1. It has 6 muscular hearts
2. It has 10 thoracic segments
3. Anal style is present in both male and female
4. It is nocturnal and present in damp places

Q. Which one of the following does not constitute a part of single uriniferous tubule?

1. Distal convoluted tubule
2. Collecting duct
3. Bowman's capsule
4. Loop of Henle

Q. What kind of excretory structure is found in prawns ?

1. Malpighian tubules
2. Nephridia
3. Kidneys
4. Green glands