What is this flagellate?
A flagellate is a cell or organism with one or more whip-like appendages called flagella. The word flagellate also describes a particular construction (or level of organization) characteristic of many prokaryotes and eukaryotes and their means of motion.
Flagellate
flagellate, (subphylum Mastigophora), any of a group of protozoans, mostly uninucleate organisms, that possess, at some time in the life cycle, one to many flagella for locomotion and sensation. (A flagellum is a hairlike structure capable of whiplike lashing movements that furnish locomotion.)
Flagellates are found in ail marine biotopes from the oligotrophic open oceans to eutrophic inshore waters, mud flats, and marshland ditches. Similar biotopes in geographically distant areas are often inhabited by the same morphological species.
Flagella propel the cell by spinning around their axis in a corkscrew motion. They move in response to a chemical concentration gradient, indicating a sensory feedback regulation system. This is the basis for bacterial chemotaxis.
Flagellum is primarily a motility organelle that enables movement and chemotaxis. Bacteria can have one flagellum or several, and they can be either polar (one or several flagella at one spot) or peritrichous (several flagella all over the bacterium).
He flagellated [=severely criticized] himself for years for allowing the business to fail.
Flagellates are commonly identified by whether they have chloroplasts or do not have chloroplasts. Flagellates with chloroplasts are commonly called phytoflagellates, and flagellates without chloroplasts are called zooflagellates. Most phytoflagellates were once classified as algae.
Flagella are microscopic hair-like structures involved in the locomotion of a cell. The word “flagellum” means “whip”. The flagella have a whip-like appearance that helps to propel a cell through the liquid. Some special flagella are used in few organisms as sensory organs that can sense changes in pH and temperature.
Flagella comprise several proteins for generating and regulating motility. Central cytoskeletal structures called axonemes have been well conserved through evolution. In mammalian sperm flagella, two accessory structures (outer dense fiber and the fibrous sheath) surround the axoneme.
Is algae a flagellate?
Flagellate green algae are found in diverse freshwater environments. They belong to several classes and class-level lineages of Streptophyta (Mesostigmatophyceae) and Chlorophyta (Mamiellophyceae, Nephroselmidophyceae, Pedinophyceae, Chlorodendrophyceae, Chlorophyceae, and other unnamed lineages).
Many unicellular protists as well as cells in complex multicellular organisms such as humans have a flagellum in this exposed position (Figure 1), where it is a crucial tool for cellular signalling and locomotion.
The assembly process of the bacterial flagellum starts from the formation of the FliF ring complex (also called the MS ring) of the basal body in the cytoplasmic membrane and proceeds in both inward and outward directions, as well as laterally.
Based on their arrangement, bacteria are classified into four groups: monotrichous (having one flagellum), amphitrichous (single flagellum at both ends), lophotrichous (numerous flagella as a tuft), and peritrichous (flagella distributed all over the cell except at the poles).
Flagellated protozoa are oval in shape and have one or more whip-like structures or flagella. The whipping action propels the protozoa through the activated sludge in a "cork-screw" pattern of locomotion. While in motion, flagellates accidentally "hit" substrate.
There are six types of flagella: Atrichous, Monotrichous, Amphitrichous, Lophotrichous, Peritrichous and Cephalotrichous. 8.
Sperm swim by means of a prominent flagellum, composed of a core of microtubules, whose sliding is powered by flagellar dynein. This array of microtubules and associated motor and linker proteins is known as an axoneme.
Flagella (singular = flagellum) are long, hair-like structures that extend from the plasma membrane and are used to move an entire cell, (for example, sperm, Euglena).
| hair shirt | penitence |
|---|---|
| self-accusation | self-castigation |
| self-condemnation | self-punishment |
| self-hatred | regret |
| compunction | ruth |
Flagellates are cells with one or more whip-like organelles called flagella. Some cells in animals may be flagellate, for instance the spermatozoa of most phyla. Flowering plants and fungi do not produce flagellate cells, but the closely related green algae and chytrids do.
What is true about flagellates?
Flagellates are protists that have one or more whip-like flagella, shown in Figure below, which they use to move about. Some flagellates have one flagellum while others have many flagella. There are about 8,500 living species of flagellates. Many are unicellular, and some are colonial.
Flagella Stain should appear opaque, and blue-violet in color.
Most flagellates are in the size range of 5 – 20 mm.
It may be defined as an infection or infestation, principally of the intestine, by Lamblia intestinalis (R. Blanchard, 1888), characterized by chronic diarrhea with intermittent acute exacerbations, digestive disturbances and nervous symptoms, or by the presence of the parasites without symptoms.
Background: Bronchopulmonary disease caused by flagellated protozoa infection (BPFP) is thought to be rare in children but may be an emerging or underestimated disease, especially in developing countries.