Q. 235.0( 1 Vote )

Differentiate between excretion ands osmo-regulation? Describe how excretion takes place in amoeba.

Answer :

Excretion is a process in which any living organism removes their metabolic waste from the body.

Osmoregulation is the physiological process that an organism uses to maintain water balance.



Amoeba is a unicellular organism found in fresh water. Amoebas eat algae, bacteria, plant cells, and microscopic protozoa and metazoan – some amoebas are parasites. They eat by surrounding tiny particles of food with pseudo pods, forming a bubble-like food vacuole. The food vacuole digests the food.


The waste material carbon dioxide is removed by the process of diffusion though the cell membrane and the nitrogenous waste mainly ammonia is excreted with the help of the contractile vacuole.



Specific excretory organs are absent in unicellular organisms like amoeba. These organisms remove waste products by simple diffusion from the body surface into the surrounding water. Amoebas possess osmo-regulatory (osmotic pressure) organelle called contractile vacuole. This collects water and waste from the body, swells up, reaches the surface and bursts to release its content to outside. The main excretion takes place through body surface by the process of osmosis. Thus, waste products are exceeding in amoeba.


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Transportation in Plants & AnimalsTransportation in Plants & AnimalsTransportation in Plants & Animals38 mins
Genius  Quiz | Heartless PlantGenius  Quiz | Heartless PlantGenius Quiz | Heartless Plant49 mins
Defining Life and Life ProcessesDefining Life and Life ProcessesDefining Life and Life Processes57 mins
Champ Quiz | Examining the Life ProcessesChamp Quiz | Examining the Life ProcessesChamp Quiz | Examining the Life Processes43 mins
Doubt Session - Life ProcessesDoubt Session - Life ProcessesDoubt Session - Life Processes46 mins
Quiz | Practising DiagramsQuiz | Practising DiagramsQuiz | Practising Diagrams44 mins
From single cell to babyFrom single cell to babyFrom single cell to baby45 mins
Champ Quiz | Dental CariesChamp Quiz | Dental CariesChamp Quiz | Dental Caries31 mins
Know About Excretory SystemKnow About Excretory SystemKnow About Excretory System46 mins
Smart Revision | Human Respiration at a GoSmart Revision | Human Respiration at a GoSmart Revision | Human Respiration at a Go50 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses
RELATED QUESTIONS :