Popular in Perspectives In Human Bio
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This 4 page Class Notes was uploaded by Bennett Notetaker on Monday September 5, 2016. The Class Notes belongs to BIO 129LEC at University at Buffalo taught by Almon, R R in Fall 2016. Since its upload, it has received 197 views.
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Date Created: 09/05/16
Bio 129 Unit 1 08/31/2016 ▯ *Oil and Water DON’T mix* ▯ The Building Blocks of Life Imports- Salts (Atoms), Small molecules Made by the body- Big complex proteins, different fats ▯ Compartments Fighting the drive towards equilibrium o The balance of water body on inside to be different from the one on the outside o Cell is extending energy to maintain the inside based on the outside this leads to POTENTIAL o BUT…you want the inside and outside to be equal aka the POTENTIAL Think of a battery and the opposite ends If you stop eating or breathing you can’t maintain the balance Equilibrium is dead Channels= particular molecules ▯ New Life Involves 2 things (that don’t always have to go together) o Sharing around genetic material o Reproduction ▯ Single Cell Forms of Life Lifespan of organism = the lifespan of a single cell Rapid generation times Rapid evolution (antibiotic resistance)-bacteria infections o Usually more than one viruses in the body when your sick o *Infection in the hospital is going to be difficult to treat because the population of the bacteria have been grown up o *MOST abused drugs are antibiotics o *Take the antibiotic until it’s done because if you don’t you’ll set yourself up for antibiotic resistance (you won’t get better) ▯ Multicellular Organisms Specialization of cells Increased complexity (humans) Lifespan is no longer the lifespan of a cell o Skins cells only last a few days (stem cells) they reproduce constantly A Society of Cells o A society is a grouping of individuals characterized by patterns of relationships between these individuals ▯ Specialized Cells Liver- makes sugar and fat (if you eat a lot of sugar your liver will turn it into fat) Heart Lung Muscle Kidney Skin Pancreas only part of body that makes insulin ▯ Communications Cells have to talk to one another in order for all of them to function Talk to chemical signals Pattern of communication starts at the brain Receiving systems are dynamic (think of eyes) o Adjust based on lighting ▯ You Started as One Cell Reproduction Genes are the directions for how an when to make specific proteins Proteins are very large molecules made up of smaller molecules called amino acids No cell can make very single protein Cancer cells (psychotic cells)- they don’t listen to the signals that tell them to stop dividing Stem Cell: these are the cells that become the human being Placenta genes are from the new human NOT the mother Damage causes cancer ▯ Nature/Nurture Genetics = potential (nature) determines what that individual is going to become Environment then acts on that potential (Nurture) Epigenetics during development can influence the potential Shots of steroids turn on specific functions in babies ▯ Variations on a Theme In the individual Different populations (height, skin color, hair color) Response to change Circadian rhythm (not always the same) ▯ Keeping you alive Bring in low energy molecules to generate high energy which is ATP Heat if a very IMPORTANT bi-product (vascular system controls heat) Alcohol effects temperature regulation, moves heat to surface of your body ▯ Central Nervous System MOST important group of specialized cells You can’t control something if you don’t monitor it (think thermostat) This is information the brain uses Nerve cells are NEVER replaced Gravity tries to pull blood away from your brain and that’s why people pass out Stem cells are the origin of cancer because they can divide Brain starts to dysfunction without sugar ▯ Controlling the Body Everything IN = is information for the brain o Amount of sugar in blood (too low the brain won’t function) o Temp. of blood (too hot then warm blood is supposed to be sent to the surface to get rid of it) o Blood pressure Information OUT= patterns of chemical messages (neurotransmitters and hormones ▯ CHAPTER 2: ▯ ▯ Life Water is the environment of life Water doesn’t dominate Atoms are the building blocks of molecules, their structure determines their behavior Bio salts made by liver (has low charge density) put it in your system to allow big molecules get through water bc it breaks up the polarity ▯ ▯ ▯
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