Exam (elaborations)
Biology 2320- Chapter 5: Integumentary System (skin) correctly answered to pass
- Course
- Institution
Biology 2320- Chapter 5: Integumentary System (skin) correctly answered to pass
[Show more]
Content preview
Biology 2320- Chapter 5: IntegumentarySystem (skin)
Integumentary System
(Function) - correct answer ✔✔Covers the body and protects, waterproofs it from the outside and
protects it from injury, infection, excessive heat or cold, and excess water and fluid loss. Provides vitamin
D synthesis
External covering of the body
~ Provides protection & prevents water loss
~ Regulates body temp
~ Synthesizes Vitamin D
~ Sensation to touch, pressure, temperature & pain
~ Excretes wastes with sweat
Layers of the integumentary system - correct answer ✔✔Epidemis and dermis
Epidermis:
Stratum Corneum
Stratum Lucidum
Stratum Granulosum
Stratum Spinosum
Stratum Basale - correct answer ✔✔superficial region; epithelial cells; nonvascularized; 4 cell types and
4 or 5 layers
What are the cells of the epidermis - correct answer ✔✔keratinocytes, melanocytes, epidermal dendritic
cells, and tactile cells
Keratinocytes - correct answer ✔✔produce fibrous protein keratin; arise in stratum basale; these cells
undergo continuous mitosis
, Keratinocytes - correct answer ✔✔Which cells are tightly connected to one another by desmosomes.
Arise in the stratum basale and undergo constant mitosis for epidermal growth. They are dead by the
time they reach the surface of the skin.
Keratin - correct answer ✔✔fibrous protein that helps give the epidermis its protective properties.
Melanocytes - correct answer ✔✔epithelial cells that synthesize the pigment melanin. Found in the
stratum basale.
Epidermal dendritic (Langerhans) cells - correct answer ✔✔macrophages cells that help activate the
immune system; first line of defense against pathogens
Tactile (Merkel) cells - correct answer ✔✔touch receptors that expand into the epidermis. Associated
with sensory nerve endings.
What are the 5 layers of the epidermis ? - correct answer ✔✔(1) stratum corneum (2) stratum lucideum
(3) Stratum granulosum (4) stratum spinosum (5) Stratum Basale
Thick skin - correct answer ✔✔~ The only place Stratum Lucidum layer is located ~ Covers the palms,
fingertips, and soles of the feet
Thin skin - correct answer ✔✔What kind of skin covers the rest of the body
Stratum Corneum - correct answer ✔✔(horny layer) 20 to30 cell layers thick that accounts for up to ¾ of
the epidermal thickness. Keratin and thickened plasma membranes of cells protect the skin against
abrasion and penetration and glycolipids b/w its cells waterproofs this layer. Barrier against biological,
chemical, and physical assaults.
Statum Lucidum - correct answer ✔✔thin translucent band, consists of rows of clear, flat, dead
kertinocytes. Visible only in thick skin.
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 BravelRadon. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
76667 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now