Excretory System
Excretory organs excretion types Excretory System in HumanHuman Excretory SystemTypes of Metabolic WastesTypes of Nitrogenous Wastes in OrganismsTypes of Metabolic WastesTypes of Excretory OrgansTypes of Excretory Organs in Lower Invertebrates
Questions
Which is the main gaseous waste product of the human body?
- NH3
- CO2
- H2S
- O2
Which among the following is a nitrogenous waste product in spiders?
- Trimethylamine oxide
- Guanine
- Uric acid
- Urea
What is ammonotelism?
- Fixing of atmospheric nitrogen by soil bacteria
- Elimination of nitrogenous waste in the form of ammonia
- Production of ammonia or ammonium compounds in the decomposition of organic matter, especially through the action of bacteria
- Elimination of nitrogen in the form of urea
In which group of animals does trimethylamine oxide occur as a waste product?
- Spiders
- Teleost fishes
- Cockroaches
- Human beings
Which system maintains the structure, pH and osmotic pressure of body fluids?
- Nervous system
- Circulatory system
- Excretory system
- Endocrine system
Which of the following organisms is both ammonotelic and ureotelic?
- Frog
- Turtle
- Paramecium
- Earthworm
Why is ammonotelism mostly found in aquatic animals?
- Because they have liver to detoxify ammonia
- Because ammonia is highly soluble in water and a large volume of water is needed to dissolve ammonia
- Because ammonia is non-toxic to aquatic animals
- Because they are the only producer of ammonia as a result of catabolism of proteins
What does the semisolid whitish material excreted out of the body of birds contain?
- Guanine
- Urea
- Uric acid
- Ammonia
What are uricotelic animals?
- Animals that excrete urea as nitrogenous waste
- Animals that excrete uric acid as nitrogenous waste
- Animals that excrete ammonia as nitrogenous waste
- Animals that excrete guanine as nitrogenous waste
Which of the following organisms exhibit(s) uricotelism?
- Earthworm
- Cockroach
- Cartilaginous fishes
- Octopus
Which of the following perform excretion in nematodes?
- Flame cells
- Vacuoles
- Rennet and cob cells
- Nephridia
Amoeba performs excretion through
- skin
- contractile vacuole and diffusion
- special organs
- pinocytosis
How do porifers and coelenterates excrete?
- Through contractile vacuole
- Through a specific canal system in tissues
- Through flame cells
- Through renett cells
What are the excretory organs of platyhelminthes?
- Flame cells
- Renett and cob cells
- Nephridia
- Vacuoles
Which of the following organisms have nephridia as excretory organs?
- Nematodes
- Annelids
- Porifers
- Platyhelminthes