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Questions and Answers
What are the two main categories of glands?
What are the two main categories of glands?
- Simple and Compound
- Tubular and Acinar
- Endocrine and Exocrine (correct)
- Merocrine and Apocrine
What do endocrine glands secrete their contents into?
What do endocrine glands secrete their contents into?
blood
What is the focus of exocrine glands?
What is the focus of exocrine glands?
secrete their contents into a lumen or duct
The structural classification of exocrine glands includes unbranched duct and ______.
The structural classification of exocrine glands includes unbranched duct and ______.
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Which of the following are types of functional classification of exocrine glands?
Which of the following are types of functional classification of exocrine glands?
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Describe how Merocrine glands release their secretion.
Describe how Merocrine glands release their secretion.
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What is a characteristic of Apocrine glands?
What is a characteristic of Apocrine glands?
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What happens to cells in Holocrine glands during secretion?
What happens to cells in Holocrine glands during secretion?
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Study Notes
Glands Overview
- Glands can be classified as single cells or groups of cells.
- Two primary types: endocrine glands and exocrine glands.
Endocrine Glands
- Endocrine glands secrete hormones directly into the bloodstream.
- Known as ductless glands due to absence of ducts for secretion.
Exocrine Glands
- Exocrine glands release their products into a lumen or through ducts.
Structural Classification of Exocrine Glands
- Unbranched Ducts:
- Simple Tubular: a single, straight duct.
- Simple Acinar: rounded structure, wider than tubular.
- Simple Coiled Tubular: coiled structure.
- Simple Branched Tubular: multiple tubular structures share a single duct.
- Simple Branched Acinar: multiple acinar structures sharing a duct.
- Branched Ducts (Compound):
- Compound Tubular: branched ducts with tubular structures.
- Compound Acinar: branched ducts with acinar structures.
- Compound Tubuloacinar: mixed structure combining tubular and acinar components.
Functional Classification of Exocrine Glands
- Classification is based on the method of secretion from the glands.
- Merocrine Glands:
- Most common type; secretions released via exocytosis.
- No part of the gland is lost during secretion.
- Examples include salivary glands and pancreas.
- Apocrine Glands:
- Secretion involves budding; the end of the cell breaks off to release secretions.
- Found in locations such as armpits and mammary glands.
- Holocrine Glands:
- Secretion builds up in the cytosol, leading to cell rupture.
- The mature cell itself becomes part of the secretory product.
- Examples include glands of skin and hair follicles.
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