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Related Concept Videos

Mechanism of Ciliary Motion01:05

Mechanism of Ciliary Motion

The ciliary structures were first seen in 1647 by Antonie Leeuwenhoek while observing the protozoans. In lower organisms, these appendages are responsible for cell movement, while in higher organisms, these appendages help in the movement of the extracellular fluids within the body cavities.
The cilia are made up of microtubules in a 9+2 arrangement, with nine microtubule doublet ring bundles, surrounding a pair of central singlet microtubule bundles. The doublet microtubule bundles are...
Mechanism of Ciliary Motion01:05

Mechanism of Ciliary Motion

The ciliary structures were first seen in 1647 by Antonie Leeuwenhoek while observing the protozoans. In lower organisms, these appendages are responsible for cell movement, while in higher organisms, these appendages help in the movement of the extracellular fluids within the body cavities.
The cilia are made up of microtubules in a 9+2 arrangement, with nine microtubule doublet ring bundles, surrounding a pair of central singlet microtubule bundles. The doublet microtubule bundles are...
Microtubules in Signaling01:22

Microtubules in Signaling

The primary cilium, made up of microtubules, acts as antennae on the cell surfaces for relaying external stimuli into the cells. These fine hair-like structures are present, generally one per cell. These are non-motile cilia in a 9+0 microtubules arrangement, where the central pair of microtubules are absent. The primary cilia arise from the basal body embedded in the cell membrane. Intraflagellar transport (IFT) carries requisite proteins from the cytoplasm to the cilium because the primary...
Channel Rhodopsins01:11

Channel Rhodopsins

Most organisms use photoreceptors to sense and respond to light. Examples of photoreceptors include bacteriorhodopsins and bacteriophytochromes in some bacteria, phytochromes in plants, and rhodopsins in the photoreceptor cells of the vertebral retina. The light-sensitive property of these receptors is because of the bound chromophores, such as bilin in the phytochromes and retinal in the rhodopsins.
Rhodopsins belong to the family of cell surface proteins called G-protein coupled receptors,...
G-Protein Gated Ion Channels01:21

G-Protein Gated Ion Channels

GPCRs are primarily responsible for our sense of smell, taste, and vision.  The binding of a sensory stimulus activates GPCR to stimulate effector proteins, many of which are ion channels in the sensory organs. GPCRs modulate the opening and closing of the target ion channels either directly by binding them, or by releasing second messengers that activate these channels. As ions move across the membrane, the membrane potential is altered, which induces an appropriate response.
Sensory organs,...
The Antenna Complex01:15

The Antenna Complex

Plants and other photosynthetic organisms comprise pigments capable of absorption of direct sunlight. These pigments are present in the reaction center - the main site of photochemical reactions as well as in the antenna complex. Under average light conditions, the rate at which reaction center pigments absorb light is far below the electron transport chain's capacity. As a result, the reaction center alone cannot provide enough energy to drive photosynthesis. The photosynthetic efficiency can...

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Related Experiment Video

Updated: May 10, 2026

Observation of the Ciliary Movement of Choroid Plexus Epithelial Cells Ex Vivo
08:00

Observation of the Ciliary Movement of Choroid Plexus Epithelial Cells Ex Vivo

Published on: July 13, 2015

Ciliary secretion: switching the cellular antenna to 'transmit'.

Prachee Avasthi1, Wallace Marshall

  • 1Department of Biochemistry & Biophysics, UCSF Mission Bay, San Francisco, CA 94143-2200, USA.

Current Biology : CB
|June 8, 2013
PubMed
Summary
This summary is machine-generated.

Cilia, known for movement and sensing, can also secrete enzymes. In Chlamydomonas, flagellar cilia bud vesicles to help daughter cells hatch from the mother cell wall after division.

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Simple Detection of Primary Cilia by Immunofluorescence
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Simple Detection of Primary Cilia by Immunofluorescence

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Related Experiment Videos

Last Updated: May 10, 2026

Observation of the Ciliary Movement of Choroid Plexus Epithelial Cells Ex Vivo
08:00

Observation of the Ciliary Movement of Choroid Plexus Epithelial Cells Ex Vivo

Published on: July 13, 2015

Application of High-speed Super-resolution SPEED Microscopy in Live Primary Cilium
07:53

Application of High-speed Super-resolution SPEED Microscopy in Live Primary Cilium

Published on: January 16, 2018

Simple Detection of Primary Cilia by Immunofluorescence
08:07

Simple Detection of Primary Cilia by Immunofluorescence

Published on: May 15, 2020

Area of Science:

  • Cell Biology
  • Microbiology
  • Developmental Biology

Background:

  • Cilia are essential microtubule and membrane-based cellular structures.
  • They are primarily known for mediating cell motility and sensory transduction.
  • Their roles in cellular processes are diverse and still being uncovered.

Purpose of the Study:

  • To investigate novel functions of cilia beyond motility and sensing.
  • To explore the role of cilia in the life cycle of Chlamydomonas.
  • To determine if cilia can function as secretory organelles.

Main Methods:

  • Utilized Chlamydomonas as a model organism.
  • Observed flagellar membrane dynamics during cell division.
  • Analyzed vesicle formation and budding from cilia.

Main Results:

  • Demonstrated that cilia in Chlamydomonas can act as secretory organelles.
  • Showed that cilia bud enzyme-containing vesicles from the flagellar membrane.
  • These vesicles are crucial for post-mitotic hatching of daughter cells.

Conclusions:

  • Cilia possess a previously unrecognized secretory function.
  • This secretory role of cilia facilitates the hatching process in Chlamydomonas.
  • Highlights the multifaceted nature of cilia in cellular processes.