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Anatomy
Chapter 3 to 6
56
Anatomy
Undergraduate 1
09/29/2015

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Term
Plasma Membrane
Definition
Phospholipid bilayer surrounding the cell
Term
Cytoplasm
Definition
Fluid in middle of cell containing all cellular organelles
Term
Nucleus
Definition
Genetic library and brain of the cell
Term
Nuclear Envelope
Definition
Outer layer of the nucleus allowing materials in and out of the cell
Term
Nucleolus
Definition
Responsible for RNA synthesis
Term
What are the 4 types of Tissues?
Definition
Epithelial,connective, muscle, and nervous tissue
Term
List the 6 Functions of Epithelial cells
Definition
1) protection
2) absorption
3) filtration
4) excretion
5) secretion
6) sensory function
Term
5 Distinguishing Characteristics of Epithelial Tissue?
Definition
1) polarity
2) specialized contacts
3) supported by connective tissue 4) avascular but innervated
5) can regenerate
Term
Apical Surface
Definition
Exposed to the outside of the body or body cavity
Term
Basal Surface
Definition
Where the epithelium attaches to underlying tissue
Term
Basal Lamina
Definition
Acts as a filter for molecules diffusing into the epithelial cells from underlying connective tissue
Term
Reticular Lamina
Definition
A fine network of collagen proteins
Term
Basement Membrane
Definition
Reinforces the epithelium and prevent stretching and tearing. Basal lamina + Reticular lamina
Term
Three Elements which Make up Connective Tissue?
Definition
Ground substance, fibers and cells
Term
Ground substance
Definition
The material that fills the spaces between the cells and contains the fibres
Term
Extracellular Matrix
Definition
Ground substance + Fibers
Term
Fibers
Definition
Provide support and are either collagen, elastic or reticular
Term
Collagen Fibers
Definition
Most numerous and strongest, form numerous cross links to increase their strength
Term
Elastic Fibers
Definition
Long and thin and allow connective tissue to stretch and recoil
Term
Four Major Types of Blast Cells:
Definition
Fibroblasts, chondroblasts, osteoblasts and hematopoietic stem cells
Term
Stages of Repair
Definition
Inflammation, Organization, and Regeneration
Term
Inflammation
Definition
Inflammatory chemicals released
Blood vessels allow white blood cells in
Clotting occurs
Term
Organization
Definition
Clot gets replaced by granulation tissue restoring blood flow
Collagen bridges gaps
Surface cells multiply to bridge gap
Term
Regeneration
Definition
A fully regenerated epithelium results with underlying scar tissues
Term
Epidermis
Definition
Outermost layer of skin
Term
Dermis
Definition
Underlying Layers
Term
Hypodermis
Definition
Deepest layer of the skin, composed of adipose tissues
Term
Cell Types in the Epidermis
Definition
Keratinocytes
Melanocytes
Merkel cells
Langerhans’ cells
Term
Keratinocytes
Definition
deep layers of the epidermis, creating stratum basale
Term
Stratum Basale
Definition
Continuously undergo mitosis
Term
Melanocytes
Definition
Cells which contain pigment, found in amongst stratum basale
Term
Langerhans’ Cells
Definition
are cells that arise from bone marrow which are responsible for phagocytosis
Term
Merkel Cells
Definition
associated with sensory nerve endings and form sensory receptors
Term
Stratum Spinosum
Definition
Layer above Stratum Basale and appear spiny in shape
Term
Stratum Granulosum
Definition
Layer above Stratum Spinosum, flat in shape and contain lamellated Granules which strengthen plasma membranes
Term
Stratum Lucidum
Definition
Only found in thick skin. Consists of a 2-3 layers of flattened dead keratinocytes with indistinct boundaries
Term
Stratum Corneum
Definition
outermost layer thickest layer, Protects against abrasion, biological, chemical and physical assaults
Term
Papillary Layer
Definition
topmost layer of dermis containing collagen and elastic fibers
Term
Dermal Papillae
Definition
contain capillaries that deliver nutrients to the epidermis
Term
Reticular Layer
Definition
Deepest layer of the dermis, consisting of dense irregular tissue
Term
3 Skin Colour Pigments
Definition
melanin, carotene and hemoglobin
Term
Melanin
Definition
Pigmentation differences are attributed to the production and retention of melanin even though we all have the same number of melanocytes
Term
Carotene
Definition
is a yellow-orange pigment that is usually obtained from the diet
Term
Hemoglobin
Definition
Pinkish hue and contributes to colouration of caucasians; little melanin found in the skin
Term
Cyanosis
Definition
Blue skin color: low oxygenation of hemoglobin
Term
Erythema
Definition
Fever, hypertension, inflammation, allergy
Term
Pallor
Definition
(blanching or pale colour) Anemia, low blood pressure, fear, anger
Term
Jaundice
Definition
Liver disorders
Term
Medulla
Definition
The central core, consists of large cells and air spaces
Term
Cortex
Definition
flattened cells surrounding medulla
Term
Arrector Pili
Definition
hair follicle has a smooth muscle that contract to form goosebumps
Term
Two Types of Sweat Glands
Definition
eccrine and apocrine
Term
Eccrine glands
Definition
Are pores found in the skin and produce sweat directly to the skin
Term
Apocrine
Definition
glands directly attached to the hair follicle to allow sweat to be secreted to the hair rather than skin. Also not involved in homeostasis, but in pheromone production
Term
Sebum
Definition
softens and lubricates the hair and skin and keeps hair from becoming brittle (oil)
Term
Lacunae
Definition
chrondrocytes encased in small cavities
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