100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
BIO 446L QUIZ 1 CH 4 QUESTIONS AND CORRECT ANSWERS $8.99   Add to cart

Exam (elaborations)

BIO 446L QUIZ 1 CH 4 QUESTIONS AND CORRECT ANSWERS

 5 views  0 purchase
  • Course
  • BIO 446
  • Institution
  • BIO 446

Anything that enters or leaves the body must pass through an ___ epithelium Describe the 2 surfaces of epithelium & purpose Have a free surface which is exposed to external or internal space and a basal surface which is attached to a basal lamina (basement membrane)-- attaches to other tissues suc...

[Show more]

Preview 2 out of 9  pages

  • August 16, 2024
  • 9
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • BIO 446
  • BIO 446
avatar-seller
twishfrancis
BIO 446L QUIZ 1 CH 4 QUESTIONS AND
CORRECT ANSWERS
Anything that enters or leaves the body must pass through an ___ ✅epithelium

Describe the 2 surfaces of epithelium & purpose ✅Have a free surface which is
exposed to external or internal space and a basal surface which is attached to a basal
lamina (basement membrane)-- attaches to other tissues such as connective and
muscle below it

Why epithelium avascular ✅prevents blood from being lost through the blood
uncontrollably

why is it important for epithelium to have nerve supply ✅recognizes touch, pain, and
sensory messages

Functions of Epithelia ✅• Mechanical protection
• Absorption
• Secretion of materials
• Lubrication of surfaces
• Formation of a surface for diffusion
• Transportation, excretion
• Sensory reception
• reproduction

Functions of Epithelia: Mechanical protection ✅protect body form outside world,
protect digestive enzymes

Functions of Epithelia: Absorption ✅like food, water, molecules, nutrients

Functions of Epithelia: Formation of a surface for diffusion ✅lungs x bv x oxygen

Functions of Epithelia: secretion of materials ✅acids to break down things, tears,
sweat

What are the 2 types of epithelia ✅1. covering
2. glandular

lamina propria- what is it and where is it located ✅loose connective tissue adjacent to
epithelium (in areas that are inside the body such as mouth, digestive tube, trachea)

basement membrane function ✅- attaches epithelium to connective tissue (or lamina
proper)

, - surface for mitosis
- controls diffusion to epithelium

Almost all epithelial cells rest on ___ tissue ✅connective tissue

internal organs (e.g. digestive, respiratory and urinary systems) rest on a connective
tissue termed the laminapropria

connective tissue of internal organs is called ✅lamina propia

outer later in the connective tissue form ___ for what fuction ✅microvilli or papillae to
increase surface area to anchor tissues together better (more SA to attach) as well as
get blood vessels into tissues to supply nutrients

Basement membrane ✅junction of the 2 laminae (basal and reticular) that connects
epithelium to connective tissue

Basal lamina is composed of ✅Type IV collagen, glycoproteins (laminin and entactin),
and proteoglycans

Laminin ✅These are large glycoproteins that attach to transmembrane integrinproteins
in the basal cell membrane and project through the mesh formed by the type IV
collagen.

Basal lamina binds with ✅(Type IV collagen) Binds epithelial cells of basal surface to
underlying connective tissue of BL using hemidesmosomes to do so

Reticular Lamina is located/ synthesized in ✅the connective tissue/ lamina proper

Reticular Lamina is made up of ✅Made of Type III collagen and connecting collagen

epithelial cells are bound together through ✅intercellular junctions

How are basal lamina and reticular lamina connected ✅by anchoring fibrils of type VII
collagen

Types of adhesion/ anchoring intercellular junctions ✅1. Zonula adherens/ anchoring
2. Desmosome (macula adherens)
3. Hemidesmosomes

Zonula adherens Intercellular adhesion Junction function ✅- directly below tight
junctions
- tie cells together like glue with actin to hold them up
- Connects cytoskeleton (using actin filaments) of one cell to another

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 twishfrancis. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $8.99. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

78998 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
$8.99
  • (0)
  Add to cart