Tag: excretion - the wastage disposing system

Questions Related to excretion - the wastage disposing system

The renal vein of the new kidney is connected to the ......................... in the recipient, which in the donor, drains blood to the inferior vena cava.
biology excretion - the wastage disposing system artificial kidney kidney transplant disorders of kidney

  1. External iliac vein

  2. Internal iliac vein

  3. Vena cava

  4. None of these

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Correct Option: B
Explanation:

Answer is option B i.e."Internal iliac vein"
The internal iliac vein drains blood from the visceral organs in the pelvic region. The internal iliac vein may double all these veins and tributaries join together to form the inferior vena cava.

The process of conversion of complex food substance to simple absorbable forms is called:

biology excretion - the wastage disposing system excretion in other organisms other excretory organ role of other organs in excretion

  1. Excretion

  2. Respiration

  3. Digestion

  4. Circulation

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Correct Option: A

Organisms that excrete amino acid is

biology excretion - the wastage disposing system excretion in other organisms other excretory organ role of other organs in excretion

  1. Aminotelic

  2. Ammonotelic

  3. Ureotelic

  4. Uricotelic

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Correct Option: A
Explanation:

Certain invertebrates like some molluscs (Unio, Limnaea, etc.) and some echinoderms (e.g., Asterias) excrete excess amino acids as such. These animals are called aminotelic and their mode of excretion is called aminotelism.

So, the correct option is 'Aminotelic'.

Find the incorrect pairing. 

biology excretion - the wastage disposing system introduction to excretory system structures and functions related to the excretory system introduction to excretion

  1. Nephridia and Leech

  2. Organ of Bojanus and Snail

  3. Malpighian tubules and Cockroach

  4. Kidney and Rat

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Correct Option: B
Explanation:

Nephridia are the invertebrate excretory organ that performs a function similar to the vertebrate kidney. These are small coiled tubes. Leech contains 17 pairs of nephridia arranged segmentally. 

The excretory organ of snail is nephridia. 
Malpighian tubules are types of excretory organs found in Cockroach. These excrete nitrogenous and other wastes. 
The excretory system of rats is kidneys. 
Thus, the correct answer is 'Organs of Bojanus and Snail.'

Select the option that correctly matches a characteristics feature with the group of three animals.

biology excretion - the wastage disposing system introduction to excretory system structures and functions related to the excretory system introduction to excretion

  1. Excretion through Malpighian tubules - Limulus, Loligo, Locusta

  2. Parapodia help in swimmming - Neries, Pheretima, Hirudinaria

  3. Rasping organ called radula - Pila, Octopus, Sepia

  4. Comb plates for locomotion - Pleurobrachia, Pennatula, Ctenoplana

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Correct Option: C
Explanation:
The phylum Mollusca animals have a file-like rasping organ called radula that helps in feeding.
(A) Malpighian tubules are the excretory organs present in terrestrial arthropods and are responsible for maintaining the ionic and osmotic balance. These tubules remove the waste from the hemolymph and the final excretion occurs in the rectum. Loligo is a mollusc.
(B) Parapodia help in swimming in aquatic annelids. Pheretima is not aquatic.
(C) In phylum Mollusca, Class Cephalopoda has a file-like structure called radula which helps in feeding. Pila, Octopus, Sepia have the radula.
(D) Phylum Ctenophora animals have eight rows of ciliated comb-plates that help in locomotion. Pennatula is a Cnidarian. 
Hence, the correct answer is 'Rasping organ called radula- Pila, Octopus, Sepia'.

Which one of the following is correctly matched?

biology excretion - the wastage disposing system introduction to excretory system structures and functions related to the excretory system introduction to excretion

  1. Wings of honey bee and crow - Homologous

  2. Thorn of Bougainvillea and tendrils of Cucurbita - Analogous

  3. Nephridia of earthworm and malphighian tubules of cockroach - Excretory

  4. Nictitating membrane and blindspot in human eye - Vestigial

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Correct Option: C
Explanation:

Homologous organs are the organ which has the same origin but performs different functions. Wings of honey bee and crow are the analogous as they perform the same function. Where thorn of Bougainvillea and tendrils of Cucurbita are the homologous organs. Nictitating membrane is the vestigial organ of the human eye but not the blind spot. Whereas nephridia is the excretory organ of earthworm and malpighian tubule of the cockroach. Thus, the correct answer is option C.