100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
BLG 101 Chapter 4 exam questions with answers $15.99   Add to cart

Exam (elaborations)

BLG 101 Chapter 4 exam questions with answers

 2 views  0 purchase
  • Course
  • Institution

BLG 101 Chapter 4 Exam

Preview 2 out of 6  pages

  • November 30, 2023
  • 6
  • 2023/2024
  • Exam (elaborations)
  • Questions & answers
avatar-seller
BLG 101 Chapter 4




Tissues - answerGroups of cells that are similar in structure that can perform common
or relates function

Histology - answerstudy of tissues

epithelial tissue - answeris a sheet of cells that covers a body surface or lines a body
cavity
- covering and lining epithelia
- on external and internal surfaces (skin)
- Glandular Epithelia
- Secretory tissue in glands
main functions- protection, absorption, filtration, excretion, secretion and sensory
receptors

Distinguishing Characteristics epithelial tissue
(Conner rolled as Paul squealed) - answer1. polarity
2. specialized contacts
3. supported by connective tissues
4. avascular but innervated
5. Regeneration

Polarity
-apical surface
- basal surface - answer- cells have polarity
Apical Surface- upper free side, is exposed to surface or cavity (mircovilli)
Basal Surface- lower attached side, faces inward toward body

specialized contacts - answer- epithelial tissue need to fit closely together
- specialized contact points bind adjecents epithelial cells together
-tight junctions
-desmosomes
Cells are very close together

Supported by connective tissue - answerall epithelial sheets are supported by
connective tissue
- basement membrane

, - made up of basal and reticular lamina
-reinforces epithelial sheet
-resists to stretching and tearing
-defines epithelial boundary
- gives it strength

Avascular but innervated - answerNo blood vessels are found in epithelial tissue
Must be nourished by diffusion from underlying connective tissues
Epithelia are supplied by nerve fibres
-O2 and nutrients
-connective tissue is feeding epithelia

Regerneration - answer- epithelial cells have high regenerative capacities
- stimulates by loss of apical-basal polarity and broken lateral contacts
- some cells are exposed to friction, some to hostile substances, resulting in damage so
must be replaced
- our skin heals fast, fast cell cycle

Simple Epithelia - answerone layer of cells
involved in absorption, secretion or filtration processes

Stratified epithelia - answermultiple layers thick for protection

Squamous - answerflat scale like

Cuboidal - answerbox-like, cube

Columar - answertall, column-like

simple squamous epithelium - answer- function where rapid diffusion is a priority
-cells are flatted laterally, and cytoplasm is sparse
-endothelium: lining the lymphatic vessels, blood vessel and heart
- mesothelium: serous membranes in the ventral body cavity

simple cuboidal epithelium - answer-single layer of cells
-secretion and absorption (carry urine)
they look like potato

simple columnar epithelium - answer- Made up of a single layer of tall cells that fit
closely together
-Function: absorption, secretion of mucus, enzymes and other substances
-found in the digestive tract

Pseudosratified columnar epithelium - answer-single layer of cells with different heights
- secrete substances, particularly mucus
- they are all connects

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

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

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

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 DESTINYGRACE. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $15.99. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

80202 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 14 years now

Start selling
$15.99
  • (0)
  Add to cart