Paramecium
Paramecium - Related Videos
06:43
In Vivo Proximity Biotinylation for Protein Interaction Studies in Paramecium tetraurelia
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Cited by 1 •
2025
The protocol presents a method for in vivo covalent attachment of biotin to proteins based on their proximity to a biotin ligase fused to a protein of interest. This modification allows for a selective enrichment of the proteins using streptavidin beads as needed in protein interaction studies.
07:49
Using the Protozoan Paramecium caudatum as a Vehicle for Food-borne Infections in Zebrafish Larvae
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Cited by 30 •
2019
Zebrafish (Danio rerio) are becoming a widely-used vertebrate animal model for microbial colonization and pathogenesis. This protocol describes the use of the protozoan Paramecium caudatum as a vehicle for food-borne infection in zebrafish larvae. P. caudatum readily internalizes bacteria and get taken up by larval zebrafish through natural preying behavior.
03:10
Analyzing the Prey-Evoked Neuronal Activity in a Transgenic Zebrafish Larva
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2025
This video demonstrates the method for studying visual prey detection in transgenic zebrafish larvae using calcium indicator-based fluoresce imaging with their neurons expressing fluorescent calcium indicator complexes.
08:35
High Throughput Danio Rerio Energy Expenditure Assay
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Cited by 23 •
2016
Zebrafish are an important model organism for the study of energy homeostasis. By utilizing a NADH2 sensitive redox indicator, alamar Blue, we have developed an assay that measures the metabolic rate of zebrafish larvae in a 96 well plate format and can be applied to drug or gene discovery.
14:02
Ex Vivo Assessment of Contractility, Fatigability and Alternans in Isolated Skeletal Muscles
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Cited by 53 •
2012
We describe a method to directly measure muscle force, muscle power, contractile kinetics and fatigability of isolated skeletal muscles in an in vitro system using field stimulation. Valuable information on Ca2+ handling properties and contractile machinery of the muscle can be obtained using different stimulating protocols.
FAQs
Paramecium cilia beat in a coordinated pattern that produces propulsion through the surrounding water. The same surface activity also helps direct food particles toward the oral groove, linking locomotion with nutrition. Because both behaviors depend on organized ciliary action, observing changes in movement can provide insight into how a single cell coordinates multiple functions.
Contractile vacuoles help Paramecium maintain osmotic balance by expelling excess water from the cell. This function is especially relevant to its freshwater environment, where water regulation is essential for cellular stability. Their activity gives researchers and students a visible way to investigate how a unicellular organism controls internal conditions without specialized organs.
Food particles directed into the oral groove become enclosed in food vacuoles, where digestion takes place. This sequence connects surface movement with internal nutrient processing: cilia help bring material to the feeding region, while vacuoles provide the site for digestion. Studying these structures clarifies how one cell performs intake and processing of nutrients.
Binary fission produces new Paramecium cells through asexual division, whereas conjugation allows genetic material to be exchanged under suitable conditions. The two processes therefore represent different biological outcomes: division increases cell numbers, while conjugation supports genetic exchange. Comparing them helps explain how reproduction and genetic continuity can occur through distinct cellular mechanisms.
A living Paramecium preparation can reveal several processes directly, including ciliary locomotion, feeding through the oral groove, food-vacuole activity, contractile-vacuole function, and cell division. Observations may also include responses to environmental stimuli. This combination of visible behaviors makes the organism useful for connecting cell structures with physiological functions in biology education and research.
Paramecium provides a compact system for investigating major biological themes at the cellular level. Its observable movement, nutrition, osmoregulation, division, genetic exchange, and responses to environmental stimuli allow learners and researchers to relate structure to function. The organism is therefore relevant to studies of cell biology, behavior, reproduction, and adaptation without requiring separate organisms for each process.