1. Unit 3

2.  Smallest unit of life  250 different types vs generalized picture from Biology  1/12000 inch  >1 meter  STRUCTURE DETERMINES FUNCTION!

3.  Cytoplasm within cells  Interstitial fluid  Plasma membrane Phospholipid bilayer Hydrophilic & Hydrophobic regions Integral & Peripheral Proteins  Markers, Receptors, & Channels

5.  Cilia  Flagella  Microvilli

6. PASSIVEACTIVE  Kinetic energy  Diffusion Simple vs Facilitated  Osmosis Uses aquaporins  Cellular energy  Active Transport Pumps  Vesicular Transport Endocytosis Exocytosis

8.  Mitochondria  Ribosomes  Endoplasmic Reticulum (smooth vs rough)  Golgi apparatus  Peroxisomes  Lysosomes  Cytoskeleton  Nucleus

9.  Study of tissues  4 main tissue types Epithelial Connective Muscle Nervous

10.  Covers surface or lines cavity  Classification Simple vs complex Squamous vs cuboidal vs columnar cells

12.  Connects, supports, protects, insulates, etc.  All have… Ground substance/matrix Fibers (Collagen, Elastic, Reticular) Cells (-blast & -cyte)  LOTS of variety

14.  Movement  Involuntary vs Voluntary  Striated vs Non-striated  Skeletal vs Cardiac vs Smooth

15.  Generate & conduct nerve impulses  Neurons & neuroglial cells

16.  Skin, glands, hair, & nails  Skin – 2 main layers Epidermis – epithelial cells Dermis – dense, connective tissue

17.  Epidermis 4 or 5 layers Melanocytes 50,000 cells/minute (40 lb lifetime)  Dermis Vascular tissue Source of fingerprints

20.  Melanocytes produce melanin when exposed to UV light Skin color differences due to amount of melanin produced AND… Eumelanin vs phaeomelanin  UVA (99% sea level) vs UVB light

21.  Too much UVB  Cellular damage  Increased bloodflow to the dermis  Blisters?  Peeling?

22.  Why permanent? Why permanent?  A Close-up view A Close-up view  Tattoo removal Tattoo removal