Human Biology Week of notes
Human Biology Week of notes Biol 100
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This 3 page Class Notes was uploaded by Sadie Jaramillo on Tuesday March 8, 2016. The Class Notes belongs to Biol 100 at Fort Hays State University taught by Dr. Eberle in Spring 2016. Since its upload, it has received 43 views. For similar materials see Human Biology in Biology at Fort Hays State University.
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Date Created: 03/08/16
MARCH 2, 2016 Evolution: Change in the frequencies of alleles in a population through generations. Population: All individuals of a single species populations evolve, not individuals. Genetic Equilibrium: No change… Genes staying equal. Natural Selection: Process in which some individuals where alleles are better suited to change in the environment will produce more surviving offspring. The environment interacts with the phenotype. The alleles producing the phenotype that survives the best and are passed on more frequently and become more abundant in subsequent generations. Alleles whose phenotypes are not well suited to the chance in the environment will decrease in subsequent generations. Individuals with the best fitness (reproductive capacity) are more likely to pass on their alleles. Populations can adapt to changing environments. Attributes of populations important in natural selection: Natural genetic variation in populations. Ability of populations to produce more offspring then are likely to survive. Charles Darwin and natural selection. Misconception that he was the face behind evolution. Gregor Mendel: Discovered alleles. His study was all math. MARCH 4, 2016 Cell—>Tissue—>Organ—>Organ System—>Organism 4 categories of tissues: 1. Epithelial Tissue: Lining (skin, inside of mouth, inside or arteries and veins) 2. Connective Tissue: (blood) Intercellular matrix: calcium 3. Muscle Tissue Striated (skeletal) muscle: lined muscle connecting to the bones Smooth muscle Cardiac muscle 4. Nervous Tissue Neurons Integumentary System: Epidermis Melabnocytes Melanin Dermis Follicles Subcutaneous Layer Adipose: fat, absorb shock and insulate 3 Basic Functions 1 Protective barrier Keeps microorganisms out Keeps water in 2. Sensory Service Detect heat 3. Regulate body temperature Through blood vessels Dilate (get bigger) Contract Sweat glands Skeletal System: Bones Cartilage Absorb shock Reduce friction between bones Ligaments Connect bone to bone Tendons Connect muscle to bone or in a few cases muscle to muscle Osteocytes (bone cells) 1 Secrete collagen (protein fiber) Vitamin C: helps the enzyme produce collagen 2. Coat collagen with minerals (calcium and phosphorus) Vitamin D: 3. Remove minerals so bone can be rebuilt