Tag: structures and functions related to the excretory system
Questions Related to structures and functions related to the excretory system
Mucus is secreted by the
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Stomach
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Duodenum
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Large intestine
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All of the above
Stomach - Foveolar cells are mucus-producing cells, which cover the inside of the stomach, protecting it from the corrosive nature of gastric acid. The mucus produced by these cells is extremely important, as it prevents the stomach from digesting itself.
Duodenum - Brunner's glands (or duodenal glands) are compound tubular submucosal glands present in the duodenum. The main function of these glands is to produce a mucus-rich alkaline secretion (containing bicarbonate) in order to: protect the duodenum from the acidic content of chyme (which is introduced into the duodenum from the stomach); provide an alkaline condition for the intestinal enzymes to be active, thus enabling absorption to take place and lubricate the intestinal walls.
Large intestine - Goblet cells reside throughout the length of the small and large intestine and are responsible for the production and maintenance of the protective mucus blanket by synthesizing and secreting high-molecular-weight glycoproteins, known as mucins.
The longest loop of Henle is found in
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Kangaroo rat
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Opposum
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Rhesus monkey
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Porcupine
An organism which has Malpighian tubule as excretory organ can be placed in phylum
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Arthropda
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Annelida
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Platyhelminthes
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None of the above
Malpighian tubules are the excretory organs in all insects. The tubules often occur in two’s or multiples of two. As insects belong to the phylum Arthropoda, the organism must be placed under it.
Name the excretory organs of grasshopper.
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Malphigian tubule
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Nephridia
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Flame cells
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None of the above
The excretory organs of grasshopper are the malpighian tubules which are coiled about in the haemocoel and open into the anterior end of the hindgut. The malpighian tubules have a wall of a single layer of cells with striated inner border. Their free ends are completely closed. In the majority of Arthropods, Malpighian tubules are the excretory organs. So, the correct option is 'Malpighian tubule'.
Organs of excretion in annelids are
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Suckers
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Nephridia
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Lungs
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Kidney
Kidney of adult reptile is
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Metanephric
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Mesonephric
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Pronephric
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All of the above
On the basis of development, there three types of kidneys as pronephric kidney, mesonephric kidney and the metanephric kidney.
The excretory product of fresh water fishes is _____.
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Urea
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Uric acid
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Ammonia
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Guanine
The excretory product of freshwater fishes is 'ammonia'.
The most advanced kidneys in which loop of Henle is present are called metanephric kidneys,these are in all;except one
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Amphibians
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Reptiles
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Birds
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Mammals
- Amphibians have mesonephric type of kidneys which are primitive compared to metanephric kidneys.
- Mesonephric kidneys do not have nephrons but their nephrons do not contain a loop of Henle.
Nephridia are the excretory organ of ___________.
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Protozoans
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Coelenterates
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Flatworms
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Annelids
In which one of the following organisms its excretory organs are correctly stated?
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Frog - kidneys, skin and buccal epithelium
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Human - kidneys, sebaceous glands and tear glands
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Earthworm - pharyngeal, integumentary and septal nephridia
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Cockroach - Malpighian tubules and enteric caeca
Nephridia is the earthworm's excretory organ. Earthworms are called septal, integumentary, and pharyngeal nephridia in three kinds of nephridial structures. These three nephridial structures are present in various body positions and differ in structures as well. Septal and pharyngeal nephridia are both enteronephric, i.e. they expel nitrogen products to the gut. Integumentary nephridia is exonephric, i.e. products of nitrogen waste are discharged outside straigh