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Bio 103 week 1 notes- Tuesday/Thursday lecture

by: Alyssa Bolin

Bio 103 week 1 notes- Tuesday/Thursday lecture Bio 103

Marketplace > Oregon State University > Biology > Bio 103 > Bio 103 week 1 notes Tuesday Thursday lecture
Alyssa Bolin
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About this Document

These notes cover the first week of lecture. Mainly focuses on the integumentary system.
General biology
Lesley M. Blair
Class Notes




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This 2 page Class Notes was uploaded by Alyssa Bolin on Monday April 11, 2016. The Class Notes belongs to Bio 103 at Oregon State University taught by Lesley M. Blair in Spring 2016. Since its upload, it has received 10 views. For similar materials see General biology in Biology at Oregon State University.


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Date Created: 04/11/16
Bio 101- Week 1 (Tuesday) Four concepts covered- overview • Anatomy- structure (blood cell) • Physiology- function (what a blood cell does) • Disease- altered function (blood clot) • Health- maintaining function (how to avoid and maintain your body) Science matters! - Different fields acquire knowledge in different ways - Scientists conduct research of observable phenomena - Microscope- 4x, 100x, 400x - Plasma membrane - Organelles - Epithelial tissues: Line the inside and outside of organs - Connective tissues: Form the “matrix” (structure) - Muscle tissues: The only tissues able to move (contract/retract) - Nervous tissues: Communication, relay sense of feeling ***Observation: Acquiring sensory information - Sound, sight, smell, feel, hear - Inference: draw conclusion based on evidence and reasoning Misconceptions - Incorrect opinion or view based on faulty information or reasoning Biology you can use - Consumer: Making choices related to health and trying to make choices to avoid diseases, hereditary/common in communities - Cultural: Impact of diseased on a culture. For example: Ebola in Africa, global impacts on family/community - Citizen: Government and healthcare and medical research, presidential election Learn how to learn! - Involves neurons in the brain - Memory= connections between neurons made by synapses - Neurotransmitters - Need food and sleep to create/maintain synapses ***Cells—> Tissues—> Organs—> Organ systems Bio 101- Week 1 (Thursday) Integumentary System- Structure - Skin and appendages (hair, feathers, scales, nails, beaks) - Keratin: Composes appendages, the more flexibility= less keratin. Keratin supplements DO NOT work because protein is broken down to amino acids - U.S. Cosmetics industry in 2016= $62.4 billion - Epidermis: Top—> Epithelial - Continually losing layers: cleaning method - Keratinocytes produce keratin, continually undergoing mitosis, get flatter as they move upwards and eventually die (differentiation) - Melanocytes produce melanin, protects the dermis from UV (sunlight) - Dermis: Middle—> Connective - Fibroblasts: fiber builders, creates structure of fiber tissues, primary protein is collagen - Produces elastic fibers and gel - Sebaceous oil glands secrete lipid-rich sebum to lubricate cells - Hypodermis (subcutaneous): Under—> Connective (different kind than dermis connective tissue) Function - Protection, gripping, vitamin D synthesis, temperature regulation, sensation (light/heavy, touch, hot/cold) Diseases - Dermatitis: Inflammation - Wound healing: Clot—> Inflammation—> Mitosis—> Differentiation - MRSA: Methicillin-resistant. Staphylococcus aureus (staph infection) Forms a protective covering so antibiotics cannot penetrate and heal - Skin cancer: UVB—> Not deep in the dermis UVA—> Deep in dermis - Tanning beds contain UVA - Apoptosis: cell death Health - Cellulite: Products DON’T really work, reduced diet/exercise DO work! - Acne: Not a disease, pores are blocked with dirt, picking causes scarring


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