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BLG 101 Chapter 5 Exam questions and answers Rated A+ $13.99   Add to cart

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BLG 101 Chapter 5 Exam questions and answers Rated A+

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BLG 101 Chapter 5 Exam

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  • November 30, 2023
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  • 2023/2024
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BLG 101 Chapter 5




integumentary system consists of - answerskin, hair, nails, sweat glands, sebaceous
(oil) glands

Epidermis - answerthe superficial layer of the skin
consist mostly of keratinized stratified squamous epithelium
- is avascular

Demis - answerunderlies epidermis
-vascular
-supplies nutrients to epidermis
-connective tissue
-includes fibroblasts, macrophages and sometimes white Blood cells
- contains fibres in the matrix
-contains nerves, blood vessels and lymphatic vessels
Contian epidermal hair follicles, oil glands and sweat glands

Hypodermis - answersubcutaneous layer,
this is a layer of *fat located under the dermis of the skin.
The hypodermis helps to insulate the body and protects underlying muscles and other
structures.

Keratinocytes - answerproduce keratin
tightly connected by desmosomes

Melancytes - answerproduce melanin, which is packaged into melanosomes\
-melanosomes transfer keratinocytes, where they protect the nucleus from UV damage

Dendritic cells - answerSupport immune system
specialized white blood cells that patrol the body searching for antigens that produce
infections

Tactile Cells - answersensory Neurons
touch and feel

, layers of epidermis
(Come Lets Get Sun Burnt) - answerCorneum
Lucidum
Granulosum
Spinosum
Basale

stratum basale - answerDeepest layer
firmly attached to the dermis
highly vascular
row of stem cells that divide
produces skin cells

stratum spinosum - answerSeveral layers thick
contains prekeratin filaments attached is desmosomes
-allows them to resist tension and pulling
gives skin integrity

stratum granulosum - answerthin layer of flatted cells i
cells appearance changes
-Nuclei and organelles disintegrate
- keratinization beings
cells slow water lose
cells above this layer die
they are starting to die at this time

stratum lucidum - answerfound only in thick skin
appears glassy
so packed
dead keratinocytes

stratum corneum - answerseveral row of flat, non nucleates, keratinized dead cells
3/4 of epidermis thickness
protect
prevent water loss
protect from abrasion and penetation
barrier

Apoptosis - answercell death

Papillary - answerSuperficial layer of areolar connective tissue consisting of loose,
interlacing collagen and elastic fibres and blood vessels.
Loose fibres allow phagocytes to patrol for microorganisms
enhances grip
contributes to sense of touch
sweat pores

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