What is apical or free surface?
An apical or free surface. A basal lamina (basement membrane), which anchors the basal surface to underlying structures. Polarity due to distinct lipid and protein components at each surface and localization of organelles within the cytoplasm. Close apposition and adhesion to neighboring epithelial cells.
Is apical surface inside or outside?
The apical surface faces the lumen (inside of a hollow organ) while the basal or basolateral surface is adjacent to the underlying tissue.
What is the difference between apical and basal?
The apical faces external environment or lumen of a tube where it is often involved in absorption or secretion. The basal mediates attachment to underlying tissue or surface via integrins.
What does apical mean in biology?
Apical means "pertaining to an apex". It may refer to: Apical ancestor, refers to the last common ancestor of an entire group, such as a species (biology) or a clan (anthropology) Apical (anatomy), an anatomical term of location for features located opposite the base of an organism or structure.
What is a free surface in anatomy?
Definition. surface of epithelial cell that is exposed to the body exterior or to the cavity of an internal organ. -"free surface" -has microvilli.
What is apical portion of cell?
apical region of cell. Definition: The region of a polarized cell that forms a tip or is distal to a base. For example, in a polarized epithelial cell, the apical region has an exposed surface and lies opposite to the basal lamina that separates the epithelium from other tissue.
What is apical and basolateral?
In the context of renal tubule physiology, the term basolateral membrane or serosal membrane refers to the cell membrane which is oriented away from the lumen of the tubule, whereas the term luminal membrane or apical membrane refers to the cell membrane which is oriented towards the lumen.
What is a basal surface?
In histology, the basal surface is the bottom edge of the cell or tissue adjacent to the basement membrane. In particular, the epithelial tissue is a group of cells (called epithelial cells) that lie together to carry out a common function. The epithelial tissue acts as a covering.
What are apical tissues?
Apical Meristem: Meaning and Function Meristems are a type of tissue found in plants and are primarily made of undifferentiated cells that are capable of cell division. There are three types of meristematic tissue on the basis of positions and these are as follows: Apical meristem. Basal / intercalary meristem.
Does apical mean top?
apical adjective (HIGHEST POINT) at the highest point or top of a shape or object: At the tip of the stalk is a single, large, apical bud.
What is the apical surface of epithelial tissue?
The apical surface of epithelial cells, which lines the lumen of sac- and tube-shaped organs and the inner surfaces of the body cavities, forms the interface between the extracellular milieu and underlying tissues.
What are the 2 surfaces of an epithelium?
The upper surface of epithelium is free, or exposed to the outside of the body or to an internal body cavity. The basal surface rests on connective tissue. A thin, extracellular layer called the basement membrane forms between the epithelial and connective tissue.
Where is the apical region?
the tip of a root or shoot in a plant where growth in length takes place by activity of the APICAL MERISTEM.
What is basolateral surface?
Medical Definition of basolateral : situated below and toward the side : located in or on the base and one or more sides Epithelia permit selective and regulated flux from apical to basolateral surfaces …—
What is the basolateral surface of epithelial tissue?
Basolateral membranes In the context of renal tubule physiology, the term basolateral membrane or serosal membrane refers to the cell membrane which is oriented away from the lumen of the tubule, whereas the term luminal membrane or apical membrane refers to the cell membrane which is oriented towards the lumen.
What are apical and basal surfaces?
The bottom edge of the epithelial tissue next to the basement membrane is the basal surface. In contrast, the edge of the epithelial tissue facing the lumen or the external environment is called the apical surface.
What is the apical surface of epithelial tissue quizlet?
The epithelial tissue's apical surface is its most superficial layer. There surfaces may sport cilia or microvilli depending upon their function. Ciliated epithelia move mucus or other substances across its surface. However, microvilli are used to increase its surface area and these epithelia are used for absorption.
What is the apical layer?
The apical surface of epithelial cells, which lines the lumen of sac- and tube-shaped organs and the inner surfaces of the body cavities, forms the interface between the extracellular milieu and underlying tissues.
Where is apical found?
Meristems are classified by their location in the plant as apical (located at root and shoot tips), lateral (in the vascular and cork cambia), and intercalary (at internodes, or stem regions between the places at which leaves attach, and leaf bases, especially of certain monocotyledons—e.g., grasses).
What is the apical part of the lung?
The apex of the lung (apex pulmonis) is that part of the lung extending above the level of the first rib. It is incompletely enveloped by the scalene muscles in its anterolateral aspect. Posteriorly, it comes into close apposition with the head and neck of the first rib.
What is apical membrane?
The apical membrane of a polarized cell is the part of the plasma membrane that forms its lumenal surface, distinct from the basolateral membrane. This is particularly evident in epithelial cells, but also describes other polarized cells, such as neurons.
What is apical surface quizlet?
Apical Surface. Surface of an epithelial cell that faces the body surface, a body cavity, the lumen of an internal organ or a tubular duct that receives cell secretions. Lateral Surfaces.
What is the difference between the apical surface and the basement membrane?
The epithelial surface cells represent the most superficial layer and face the free or apical surface. The basal surface is formed from the deepest layer cells in the epithelium and it faces the basement membrane. The basement membrane serves to anchor the basal layer to the underlying connective tissue.
What is the function of apical meristem?
The apical meristem function is to create primary tissues for the plant. As new cells are created from the apical meristem, the new cells push those older cells to the sides, elongating the tissue before the cells differentiate into one of three types.
What is apical growth?
Apical is a description of growth occurring at the tips of the plant, both top and bottom. Intercalary meristem is found between branches, while lateral meristem grow in girth, such as in woody plants.
What are the surfaces of the lung?
The three surfaces of the lung include the costal, medial, and diaphragmatic surfaces. The costal surface is covered by the costal pleura and is along the sternum and ribs. It also joins the medial surface at the anterior and posterior borders and diaphragmatic surfaces at the inferior border.
What is Apex in chest xray?
The apical zone (a.k.a. lung apex) is one of the four chest radiograph zones and an important location for missed diagnoses when reporting a frontal chest radiograph and makes up one of the "review areas". It is sometimes thought of as a subdivision of the upper zone.
Where is apical membrane?
Overview. The apical membrane of a polarized cell is the part of the plasma membrane that forms its lumenal surface, distinct from the basolateral membrane. This is particularly evident in epithelial cells, but also describes other polarized cells, such as neurons.
Where is the apical surface of epithelium found quizlet?
The apical surface is the side of the cell that faces the lumen or body cavity, and the basal surface is the side of the cell that faces the underlying connective tissue.
What is the apical membrane?
Overview. The apical membrane of a polarized cell is the part of the plasma membrane that forms its lumenal surface, distinct from the basolateral membrane. This is particularly evident in epithelial cells, but also describes other polarized cells, such as neurons.