Lecture 7

Cells or aggregation of cells that secrete.

Release secretory products via a system of ducts that opens upon surfaces of the body.

In contact with the external world.

Release secretory products into the extracellular space, and then it enters the bloodstream

Ductless gland

Derived from epithelia

Maintains the connection with the body surface

Loses it's connection with the body surface

Mucus-secreting glands

Sweat and oil glands

Salivary glands

Mammary glands

Liver

Pancreas

Parotid

Sublingual

Submandibular

Modified sweat gland

Secretions contain polysaccharides and glycoproteins.

Sublingual Gland

Goblet Cells

Nucleus near the surface

Cells appear lighter

Watery proteinaceous secretion

Enzyme secretion

Nucleus at the center of the cell

Parotid gland

Pancreas

Combined serous and mucus

Submandibular gland

What does the submandibular gland contain most of?

Which gland is classified according to the cell number? (uni/multicellular)

Goblet Cell

The only unicellular exocrine gland in mammals is...

Occurs in the epithelium of many mucous membranes

Protects and lubricates internal body surfaces

Secretes glycoprotein

What produces mucus?

Secretion....

The duct system consists of...

The simplest multicellular gland...

A surface epithelium consisting entirely of secretory cells

Inner surface of the stomach

Secretory portions all have the same shape.

Tubular glands have the shape of....

Acinar glands have the shape of....

Alveoli glands have the shape of....

Pancreas has the shape of....

If the secretory part of the gland is branched, it is called...

Simple gland is called

Compound gland is called

Intestinal gland is an example of...

Gastric Gland is an example of...

Duodenal gland of the small intestine is an example of...

Sebaceous gland is an example of...

Mammary gland is an example of...

Calivary gland is an example of

Vesicles open onto the surface of the cell, the secretory product is discharged from the cell by exocytosis without any loss of cell substance.

Salivary and pancreases are examples of...

Cytoplasm of cells is lost together with the secretory product.

Continuity of plasma membrane is restored by....

Sweat glands, mammary glands and prostate are examples of....

Breakdown and discharge of the entire secretory cell

What is the only example of Holocrine secretion?

Thread shaped extensions of the epithelial cells.

Increase the surface area of epithelial cells

Found in Absorption sites of epithelial cells.

Contain actin filaments

Small intestine contains...

Epididymis contains....

Ductus Difference contains....

What is the difference between microvilli and stereocilia?

Microvilli are ________________ than stereocilli.

Stereocilli are

Numerous + Short

Sweep mucus & debris from lungs

Propel ovum in fallopian tubes

Has an oar-like movement

Alternates power & recovery strokes.

Generates force perpendicular to it's axis.

How many flagella are there per cell?

Longer and whip-like

Move unicellular and small multicellular organisms.

Undulatory movement force generated parallel to it's axis.

Require ATP for movement.

Bending of cilia and flagella is done by the motor protein....

The smallest known motor protein is...

Cilia and Flagella have...

What is the cause of cilia immotile syndrome?

What is the result of cilia immotile syndrome?

Zona Occludens is also known as

Zonula Adherens is also known as

Closes off intercellular spaces by the proteins Claudin and Occludin

Anchors junctions by the glycoprotein Cadherin

Common in epithelial tissues of stomach, intestine, and urinary bladder

More fusion sites leads to ___________ seal

Prevents molecules from passing between cells and fuses the cells together.

The cytoskeletal components are Actin Filaments.

Cadherin attaches to proteins from ________ called Catenin.

Catenin attaches to ________ of the cytoskeleton.

Separates apical and basolateral membrane domains.

Strengthens and stabilizes nearby tight junctions

Provides points of strong intermediates filaments coupling between adjacent cells.

Proteins inserted into membrane of adjacent cells.

Two disc-like plaques are connected across intercellular space by....

________________ attaches to cytoplasmic side of the desmosome.

Desmogleins and desmocolin belong to..

Cytoskeletal Components are intermediate filaments.

This does not have any cytoskeletal components.

Provides a passageway between two cells that allows small molecules to move directly between neighboring cells.

Cells are connected by these hollow cylinders of proteins called....

Found in the cardiac muscle, and some smooth muscle cells.

This mediates the attachment of epithelial cells to the basement membrane.

These proteins attach the cell to the matrix proteins of the basement membrane.

Anchors the cytoskeleton to the basal lamina.

Epithelia are seperated from the underlying connective tissue by this extracellular supporting layer.

The basal lamina is also called

The Basal Lamina is _________ thick

Consists of proteins secreted by the epithelial cells.

The basal lamina is surrounded by electron lucent layers called

Components of the __________ include Collage Type-IV, Laminin, Entactin & Proteoglycan.

Basal Lamina are connected to underline connective tissue by Collagen type-_________?

Which of these is NOT a function of the basal lamina?

Consists of reticular fibers that are embedded in ground substance.

Synthesized by cells of the connective tissue underlying the epithelium.

Cancerous Transformation.

Transformation of an epithelial type into another type is due to....

Chronic Smoking changes Psedustratified Ciliated Epithelium to....

Where do you expect to find stereocilia?

The cellular projections that are present in epithelium of absorptive epithelia are

The cellular projections that are present in epithelium of respiratory system are

Which of these are symptoms of immotile cilia syndrome?

One of the following interceullar junctions is expected to be part of the blood-brain barrier:

Which of the following structures is/are immotile:

Cancerous transformation of cells is called

The junctional complex that anchors cells to underlying matrix is....

One of the following is classified as a unicellular gland:

Fused basal lamina is found in...

Which type of collagen is associated with basal lamina

Which of the following is responsible for cell shape, internal structure organization and cell movement?