Anatomy & Physiology definitions - Tissues

Identify the cellular Junction

Forms fluid tight seals

Tight junctions

Identify the cellular Junction

Example is a basement membrane

Hemidesmosomes

Identify the cellular Junction

Anchors cells together

Adherens junction

Identify the cellular Junction

For communication through connexons

Gap junctions

Identify the cellular Junction

Connects cells to extracellular material

Hemidesmosomes

Identify the cellular Junction

Found in epithelial cells that line the bladder and intestines

Tight junctions

Identify cell shapes

Flat:

squamous

Identify cell shapes

Rectangular: 

columnar

Identify cell shapes

Variable:

Transitional

Identify cell shapes

Cubelike:

Cuboidal 

Describe the differences between the simple epithelium and the stratified epithelium

The main difference is that simple epithelium consists of a single layer of cells, while stratified epithelium is composed of multiple layers

Compare and contrast ciliated and non-ciliated simple columnar epithelial cells

non-ciliated cells use microvilli to increase absorption while ciliated cells use syncrozied movement of cilia

Define Gland

Is a single cell or mass of epithelial cells adapted for secretion

Compare and contrast Endocrine and Exocrine glands

Endocrine glands are ductless and release hormones directly into the bloodstream for internal distribution to target cells, while exocrine glands use ducts to secrete substances onto an external surface or into a body cavity

What is an example of a unicellular exocrine gland?

Goblet cell

What are examples of multicellular exocrine glands?

sweat, salivary, sebaceous, and mammary glands

Diagram each of the 3 functional classifications of Exocrine Glands and provide a

brief explanation of each underneath:

merocrine - discharge secretory products through exocytosis

apocrine - Accumulate secretory product at apical surface; that portion pinches off from the rest of the cell to form secretion

holocrine - Accumulate secretory product in cytosol; when cell dies it and its products are discharged as glandular secretion