Biology 1020 Heyborne FEB 8-10 2016
Biology 1020 Heyborne FEB 8-10 2016 BA 1010
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This 2 page Class Notes was uploaded by Austin Hansen on Wednesday February 10, 2016. The Class Notes belongs to BA 1010 at Southern Utah University taught by Greg Powell in Fall 2015. Since its upload, it has received 21 views. For similar materials see in Business at Southern Utah University.
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Date Created: 02/10/16
February 8, 2016 Chapter 5 Skeleton Functions of Skeleton: -Support -Protection -Blood Cell Production -Storage -Movement Longbone parts: -Periosteum- tough, protective, tissue -Epiphysis- big end of the bones -Diaphysis-middle part of bone -Articular Cartilage- BONE TISSUE 1. Compact Bone- outer layer (more dense) 2. Spongy Bone- Inner layer (spongy bone marrow) BONE CELLS: Osteoprogenitor cells- unspecialized cells (usually become Osteoblasts) Osteoblasts-Bone forming cells (Use calcium in the blood) Osteoclasts-Breaks down bone (Put calcium into blood) Osteocytes-Mature bone cells (maintains bone tissue) On average, 205 bones in the Human body Axial skeleton Skull Cranium and facial bones Sinuses -Air spaces within bones -Lined by mucous -Reduces weight of skull -give a resonant sound February 10, 2016 chapter 19 We have 23 Chromosomes in our cells Karyotype -22 Autosomes (Chromosomes 1-22: code for everything but gender) -1 Sex Chromosomes (X and Y Chromosomes: Code for gender) Trait- Distiguishing characteristic Genes-Traits of an individual Allele- code for variation of a single trait Chromosomes can have the same genes (hair color, height, eye color) but different alleles (blonde, 5 foot 10 inches, blue eyes) Dominant- A trait allows shows up when an Allele is present Recessive- A trait that is covered up when an Allele is present Genotype- Refers to the genes of an individual Pheneotype- Observable trait
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