100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Bios 251 Final Exam: Questions & Detailed Answers $14.99   Add to cart

Exam (elaborations)

Bios 251 Final Exam: Questions & Detailed Answers

 8 views  0 purchase
  • Course
  • BIOS 251
  • Institution
  • BIOS 251

Bios 251 Final Exam: Questions & Detailed Answers

Preview 3 out of 17  pages

  • September 9, 2024
  • 17
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • BIOS 251
  • BIOS 251
avatar-seller
LeCrae
Bios 251 Final Exam: Questions & Detailed Answers

Functions of the skin Right Ans - Protection, Thermoregulation, Cutaneous
Sensation, Vitamin D synthesis, Blood Reservoir, Excretion and Absorption.

Layers of skin Right Ans - epidermis and dermis

What are the major cell types in the epidermis? Right Ans - keratinocytes
and melanocytes, langerhans, merkel cells

What are keratinocytes? Right Ans - Epidermal cells composed of keratin,
lipids, and other proteins.
Produce keratin, help waterproof the skin.

What are melanocytes? Right Ans - Cells that produce skin pigment
granules in the basal layer and produce melanin

What are Langerhans cells? Right Ans - Specialized dendritic cells found in
the skin. participate in immune response against microbes. they also help
alert cells of the immune system of microbes that are invading

What are Merkel cells? Right Ans - attach to sensory neurons. in the
deepest layer

thick skin vs thin skin Right Ans - Thick: palms of hands and soles of feet,
has all five stratum
Thin: Covers rest of the body, does not have visible stratum lucidum, only has
4 stratum

thick skin Right Ans - 5 layers- come lets get sun burnt

Layers of the epidermis (superficial to deep) thick skin Right Ans - stratum
corneum, stratum lucidum, stratum granulosum, stratum spinosum, stratum
basale

stratum corneum Right Ans - outermost layer of the epidermis, which
consists of flattened, keratinized cells. no longer contain a nucleus

,stratum lucidum Right Ans - a layer of the epidermis found only in the thick
skin of the fingers, palms, and soles
clear flat dead keratinocyters that contain large amounts of kertain and
thickened plasma membranes

stratum granulosum Right Ans - keratinocytes are undergoing apoptosis
distinctive feature of keratohyalin

stratum spinosum Right Ans - a layer of the epidermis that provides
strength and flexibility to the skin

startum basale Right Ans - A single layer of columnar cells (base layer)
undergo cell division
structure include scattered intermediate filaments called keratin intermediate
filaments

regions of dermis Right Ans - papillary and reticular

papillary layer Right Ans - outer layer of the dermis, directly beneath the
epidermis

recticular layer Right Ans - deepest skin layer; contains blood vessels,
sweat and oil glands, and deep pressure receptors called Pacinian corpuscles

accessory structures of the skin Right Ans - hair, skin glands, and nails

Anatomy of Hair Right Ans - shaft, root, follicle, bulb
composed of columns of dead, keratinized epidermal cells bonded together by
extracellular proteins

hair shaft Right Ans - the portion of the hair that projects beyond the skin

hair root Right Ans - The part of the hair contained within the follicle,
below the surface of the scalp.
shaft and root both contain three layers of cells: medulla, cortex, cuticle

hair follicle Right Ans - sac within which each hair grows

, Lanugo Right Ans - fine, soft hair, especially that which covers the body and
limbs of a human fetus or newborn.

vellus hair Right Ans - pale, fine hair; found as children's and adult
women's body hair

hair matrix Right Ans - a germinal layer of cells responsible for the growth
of existing hairs and the production of new hairs when old hairs are shed

hair color is determined by Right Ans - amount and type of melanin

Dark colored hair contains Right Ans - eumelanin (brown and black)

blond hair contains Right Ans - pheomelanin

what glands are associated with the skin Right Ans - sweat glands:
eccrine- temperature control
apocrine- scent gland located in pits, and groin

sebaceous glands: secrete oil or sebum

mammary glands: modified sweat glands that secrete milk

ceruminous glands: produce ear wax, cerumen

sebaceous glands Right Ans - secrete sebum (oil) into the hair follicles
where the hair shafts pass through the dermis

sebum (oil) Right Ans - Gives protection from external factors such as
invasion by certain bacteria

sudoriferous glands Right Ans - glands that secrete sweat to the outside of
the body; also assist in body temperature regulation

eccrine glands Right Ans - glands that produce sweat; found over most of
the body- emotional sweating

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 LeCrae. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $14.99. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

62491 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
$14.99
  • (0)
  Add to cart