Class notes
Bio 2311 Notes
- Course
- BIO 2311
- Institution
- New York City College Of Technology
This is a comprehensive and detailed note tissue for Bio 2311. *Essential Study Material!! *For you, at a price that's fair enough!!
[Show more]
Seller
Follow
Content preview
Dr. ChakrabortyA&P I
Review: Tissue: Tissues are collections of cells and cell products that perform specific, limited
functions.
Types of tissue
Epithelial tissue: Covers exposed surfaces; Lines internal passageways; Forms glands
Connective tissue: Fills internal spaces; Supports other tissues; Transports materials;
Stores energy
Muscle tissue: Specialized for contraction; Skeletal muscle, heart muscle, and walls of
hollow organs
Neural tissue: Carries electrical signals from one part of the body to another
Epithelial Tissues: Layers of cells covering internal or external surfaces and Glands -structures
that produce secretions
Characteristics of Epithelia
Cellularity (cell junctions) Functions of Epithelial Tissue
Polarity (apical and basal surfaces) Provide physical protection
Attachment (basal lamina) Control permeability
Avascularity Provide sensation
Regeneration Produce specialized secretions
(glandular epithelium
Specializations of Epithelial Cells: Move fluids over the epithelium (protection). Move fluids
through the epithelium (permeability). Produce secretions (protection and messengers)
Attachments: Maintaining the Integrity of Epithelia - intercellular connections and attachment to
basal lamina: two layers. top layer (clear layer) secreted by epithelial tissue known as lamina
lucida and the bottom layer secreted by connective tissue known as lamina densa.
CAMs (cell adhesion molecules): transmembrane proteins; Intercellular cement: proteoglycans
Cell junctions: Form bonds with other cells or extracellular material:
i) tight junctions: between two plasma membranes that prevents passage of water and solutes
ii) gap junctions: allow rapid communication; held together by channel proteins (junctional
proteins, connexons)
iii) desmosomes: button, belt and hemi desmosomes
Classification of Epithelia
Based on shape Based on layers
Squamous epithelia: thin and flat Simple epithelium: single layer of cells
Cuboidal epithelia: square shaped Stratified epithelium: several layers of cells
Columnar epithelia: tall, slender rectangles
** Read all the locations that are mentioned in the slide (important)
Two additional epithelial tissues are:
Transitional Epithelium: Tolerates repeated cycles of stretching and recoiling and returns to its
previous shape without damage- situated in regions of the urinary system (e.g. urinary bladder)
Pseudostratified columnar epithelium – trachea
Glandular Epithelia: Endocrine glands and Exocrine glands
Endocrine gland - release hormones into interstitial fluid and have no ducts
Exocrine glands- produce secretions onto epithelial surfaces through ducts
Classification of Exocrine glands:
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller anyiamgeorge19. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
75860 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now