4. Tissues

Gland

Tissue Structures

Glands - Merocrine, Apocrine, Holocrine

 Sebaceous glands are classified as holocrine glands. It should be noted that holocrine glands completely rupture to release their products, while apocrine glands rupture only at the apex to release their products. 

 A sebaceous (oil) gland of the skin must completely rupture to release its secretory products. Thus, this type of gland is considered to be __________. 

 Multicellular exocrine glands with round secretory cells are alveolar<i>,</i> and if the ducts branch, they are considered compound. 

 A multicellular gland with round secretory cells and branching ducts is described as __________. 

Microscopic Appearance of Transitional Epithelium

 Mucous cells and goblet cells are common and important examples of unicellular exocrine glands. 

 __________ are important and common unicellular exocrine glands. 

 Goblet cells, located between columnar epithelial cells, function in producing the protein mucin, which, when combined with water, forms mucus. 

 Which of the following is a unicellular gland associated with mucus production? 

 An apocrine gland stores its secretion but only loses the top part of the cell when secretion takes place. 

 A merocrine gland excretes its secretion by exocytosis without rupturing the cell. 

 An endocrine gland secretes its product directly into the bloodstream. 

 Which of the following exocrine glands stores its secretion until the gland ruptures? 

Body Membranes

Tissues Types of Glandular Epithelium

 a compound tubuloalveolar exocrine gland 

 A compound alveolar exocrine gland, for example the mammary glands, has duct branches and an alveolar (saclike) secretory structure. A simple exocrine gland has a duct that does not branch. A compound tubular exocrine gland has duct branches and a tubular secretory structure. A compound tubuloalveolar exocrine gland has duct branches and both tubular and alveolar secretory units. In holocrine glands, the entire secretory cell ruptures, releasing secretions and dead cell fragments. 

 You observe a multicellular gland with branched ducts and saclike secretory areas. What type of gland would this most likely be? 

 Exocrine glands secrete their products onto body surfaces (skin) or into body cavities. Endocrine glands are generally responsible for secreting hormones and other substances into the blood and lymph. 

 to secrete substances onto body surfaces or into body cavities 

Body Membranes - Serous Membranes - Mucous Membranes

Endocrine Vs Exocrine Glands

 Epithelial tissue secretes the superficial basal lamina region of the basement membrane, whereas connective tissue produces the deeper reticular layer of the basement membrane. 

 The basement membrane is located between which of the following tissue types? 

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24. Nutrition, Metabolism, Energy Balance

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26. Fluid and Electrolyte Balance, Acid Base Balance

27. Reproductive System

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