Apical Polarity
Apical Polarity - Related Videos
01:17
Assessment of apical pulse
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2025
Assessing the Apical Pulse Assessing the apical pulse is a critical nursing procedure, particularly indicated for: • Children younger than two years. • Cardiac patients. • Patients before administering specific medications (e.g., cardiac glycosides like digoxin). Location: The apical pulse is auscultated at the left midclavicular line. It is located at the 5th intercostal space, where the heart's apex is closest to the chest wall. Preparation: Gather Equipment: Ensure you have a...
01:01
Group Polarization
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2020
Group polarization is the strengthening of an original group attitude following the discussion of views within a group (Teger & Pruitt, 1967). That is, if a group initially favors a viewpoint, after discussion the group consensus is likely a stronger endorsement of the viewpoint. Conversely, if the group was initially opposed to a viewpoint, group discussion would likely lead to stronger opposition. The phenomenon of group polarization explains many actions taken by groups that would not...
03:37
Molecular Shape and Polarity
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2020
Dipole Moment of a Molecule Polar covalent bonds connect two atoms with differing electronegativities, leaving one atom with a partial positive charge (δ+) and the other atom with a partial negative charge (δ–), as the electrons are pulled toward the more electronegative atom. This separation of charge gives rise to a bond dipole moment. The magnitude of a bond dipole moment is represented by the Greek letter mu (µ) and is given by the formula shown here, where Q is the magnitude of the...
09:38
Analyzing the Function of Small GTPases by Microinjection of Plasmids into Polarized Epithelial Cells
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Cited by 5 •
2011
This article details the procedures involved in overexpression and analysis of small GTPases in polarized epithelial cells using microinjection technique.
06:08
Apical Resection Mouse Model to Study Early Mammalian Heart Regeneration
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Cited by 12 •
2016
A step-by-step video protocol of apical resection is demonstrated in this study. Apical resection is a recently highlighted surgical approach in mammalian heart regeneration research. This study may promote the application of apical resection as a standard methodology in research into the mechanism underlying heart regeneration.
FAQs
Apical polarity emerges from cooperation among signaling pathways and protein complexes rather than from a single structural feature. These systems position membrane components in appropriate domains, coordinate cell-junction organization, and orient the cytoskeleton. Together, those activities give epithelial cells a stable internal layout that supports tissue architecture, barrier formation, and directional movement of substances.
They connect polarity to both tissue structure and cell behavior. Junctional organization helps cells maintain defined domains and contributes to barrier formation, while cytoskeletal orientation provides an internal framework for positioning and directional organization. Studying these linked features helps explain how epithelial cells preserve shape and coordinate movement of substances across a tissue.
Disruption can affect cell shape, tissue organization, and signaling simultaneously. Because apical polarity coordinates membrane domains, junctions, and cytoskeletal orientation, its loss may compromise the organized architecture needed for epithelial function. This makes polarity defects relevant to investigations of abnormal development, impaired organ function, and disease-related tissue changes.
During development, apical polarity provides a framework for organizing epithelial cells into functional tissues. Its associated control of cell shape, junctions, membrane components, and cytoskeletal orientation can influence how tissue architecture is established. Consequently, examining polarity helps researchers connect cellular organization with developmental outcomes rather than treating tissue structure as an isolated feature.
In organ biology, studying apical polarity links epithelial organization with organ function. Investigators can consider whether membrane domains, cell junctions, and cytoskeletal orientation remain coordinated, then relate changes to barrier formation or directional transport. This perspective helps explain how organized cellular surfaces support normal function and how their disruption contributes to disease.
Assessment should consider several connected features, including the placement of membrane components, the organization of cell junctions, cytoskeletal orientation, cell shape, tissue organization, and signaling. Examining these features together indicates whether polarity is being maintained. It also helps relate molecular organization to larger outcomes such as epithelial architecture, barrier formation, and directional transport.