With which portion of an epithelial cell in the stomach would food be in contact? basal surface basement membrane tight junctions apical surface gap junctions Which of the following relationships between a tissue and its general function is not correct? Epithelial: control Nerve: control Connective: support Muscle: movement Goblet cells are found in which of these epithelia. Stratified squmous Simple squmaous Transitional Simple columnar Solution 1. apical surface The stomach surface is lined with mucus secreting columnar epithelial cells. A single cell structure consists of three surfaces-apical, lateral and basal. The apical surface faces the intestinal lumen. Extending from the apical surface are numerous fingerlike projections (100 nm in diameter) called microvilli, referred as the brush border due to their appearance. Microvilli greatly increase the area of the apical surface, enhancing the absorptive and transportive capacity of the intestinal epithelium. Overlying the brush border, are the oligosaccharide side chains of integral membrane glycoproteins, glycolipids, and enzymes (glycocalyx) catalyzing the final digestion of ingested carbohydrates and proteins. The resultant monosaccharides and amino acids produced are transported across the intestinal epithelium and eventually into the bloodstream. The lateral surface encloses tight junctions, adherens junctions, spotdesmosome, gap junction, intermediate filament, and hemidesmosome. -Tight junctions, prevent diffusion of substances between the intestinal lumen and the blood via the extracellular space between cells. They function as a selective and semipermeable barrier between apical and basolateral compartments of the epithelial layer. They facilitate the passage of small ions and water-soluble solutes through the paracellular space while preventing the passage of luminal antigens, microorganisms and their toxins. -Gap junctions are door-like connections between each epithelial cells.They allow movement of small molecules and ions between the cytosol of adjacent cells. -The remaining three types of junctions, adherens junctions, spot desmosomes, and hemidesmosomes are critical to cell-cell and cell-matrix adhesion. The basal surface of the epithelial cells is the basal lamina, consisting of a fibrous network of collagen and proteoglycans that supports the epithelial cell layer. 2. epithelial:control Epithelial cells line the body cavities and surface of organs and blood vessels. Their functions include secretion, selective absorption, protection, transcellular transport, and sensing. 3. simple columnar Goblet cells are found scattered among the epithelial cells, mostly in the respiratory and intestinal tracts. These cells are simple columnar epithelial cells with a narrow base and expanded apical portion (glandular shape). They secrete mucus which protect against stress and chemical damage, and destroy the microorganisms and particulate matter..

1. With which portion of an epithelial cell in the stomach would food be in contact? basal surface
basement membrane tight junctions apical surface gap junctions Which of the following
relationships between a tissue and its general function is not correct? Epithelial: control Nerve:
control Connective: support Muscle: movement Goblet cells are found in which of these
epithelia. Stratified squmous Simple squmaous Transitional Simple columnar
Solution
1. apical surface
The stomach surface is lined with mucus secreting columnar epithelial cells. A single
cell structure consists of three surfaces-apical, lateral and basal.
The apical surface faces the intestinal lumen. Extending from the apical surface are
numerous fingerlike projections (100 nm in diameter) called microvilli, referred as the brush
border due to their appearance. Microvilli greatly increase the area of the apical surface,
enhancing the absorptive and transportive capacity of the intestinal epithelium. Overlying the
brush border, are the oligosaccharide side chains of integral membrane glycoproteins,
glycolipids, and enzymes (glycocalyx) catalyzing the final digestion of ingested carbohydrates
and proteins. The resultant monosaccharides and amino acids produced are transported across the
intestinal epithelium and eventually into the bloodstream.
The lateral surface encloses tight junctions, adherens junctions, spotdesmosome, gap
junction, intermediate filament, and hemidesmosome.
-Tight junctions, prevent diffusion of substances between the intestinal lumen and the blood via
the extracellular space between cells. They function as a selective and semipermeable barrier
between apical and basolateral compartments of the epithelial layer. They facilitate the passage
of small ions and water-soluble solutes through the paracellular space while preventing the
passage of luminal antigens, microorganisms and their toxins.
-Gap junctions are door-like connections between each epithelial cells.They allow movement of
small molecules and ions between the cytosol of adjacent cells.
-The remaining three types of junctions, adherens junctions, spot desmosomes, and
hemidesmosomes are critical to cell-cell and cell-matrix adhesion.
The basal surface of the epithelial cells is the basal lamina, consisting of a fibrous
network of collagen and proteoglycans that supports the epithelial cell layer.
2. epithelial:control
Epithelial cells line the body cavities and surface of organs and blood vessels. Their functions
include secretion, selective absorption, protection, transcellular transport, and sensing.
3. simple columnar

2. Goblet cells are found scattered among the epithelial cells, mostly in the respiratory and
intestinal tracts. These cells are simple columnar epithelial cells with a narrow base and
expanded apical portion (glandular shape). They secrete mucus which protect against stress and
chemical damage, and destroy the microorganisms and particulate matter.