Communication‚ Homeostasis & Energy Communication & Homeostasis Outline the need for communication systems within multicellular organisms‚ with reference to the need to respond to changes in the internal and external environment and to co-ordinate the activities of different organs. Organisms need to respond to external stimuli‚ e.g. temperature‚ oxygen concentration and levels of sunlight. These may be over time‚ e.g. winter fur to summer fur‚ or quickly‚ e.g. changing size of pupils. Internal
Free Cellular respiration Adenosine triphosphate Action potential
DIFFUSION= The movement of atoms or molecules from an area of higher concentration to an area of lower concentration. Atoms and small molecules can move across a cell membrane by diffusion. OSMOSIS= Diffusion of fluid through a semipermeable membrane from a solution with a low solute concentration to a solution with a higher solute concentration until there is an equal concentration of fluid on both sides of the membrane. SELECTIVE PERMEABLE MEMBRANE=a membrane (as a cell membrane) that allows
Premium Cell Osmosis Chromosome
The areas of Michael’s brain that were injured during his birth affected his control over his voluntary movements. Which part of the nervous system distributes motor commands to skeletal muscles? Somatic nervous system The somatic nervous system controls the contractions of skeletal muscles and is under voluntary control. Which principle descending motor pathway provides conscious control over voluntary muscle movements? Corticospinal pathway The corticospinal pathway is also called the pyramidal
Premium Spinal cord Corticospinal tract Nervous system
Boston based 20 year old rapper born on April 8th 1989 Kristian Garcia is fresh off completely his debut soon to be classic mixtape entitled "The Mass Effect" Boston hasn’t been known churning out great emcees over the past‚ but Kristian Garcia is here not only here to put Boston on the map the rather the whole east coast. Roxbury native‚ half black half spanish with lyricism reminiscent of a young Nas and the soul of Big Pun setting himself lyrically apart from many of today’s youngest rappers Kris’s
Premium Hip hop music Rapping Hip hop
21: The Immune System: Innate and Adaptive Body Defenses Objectives PART 1: INNATE DEFENSES Surface Barriers: Skin and Mucosae 1. Describe surface membrane barriers and their protective functions. Internal Defenses: Cells and Chemicals 2. Explain the importance of phagocytosis and natural killer cells in innate body defense. 3. Describe the inflammatory process. Identify several inflammatory chemicals and indicate their specific roles. 4. Name the body’s antimicrobial substances and describe
Premium Immune system
Aim: To find out what effect different temperatures have on the enzyme (Rennin‚ in milk) Introduction: Rennin is usually present in out stomach it helps us digest protein. Enzymes have optimum temperatures‚ since rennin is an enzyme from the human stomach its optimum temperature would be around 37-38 Celsius‚ optimum pH would be 1-3. If the temperature is too low the enzymes will move around slowly. A temperature that is too high or an incorrect pH would denature the enzyme. Materials:
Premium Temperature Enzyme Gas
BIOL 1208 Writing Assignment 1 Cover Sheet I certify that the writing in this assignment is my individual work and is my intellectual property. It does not contain the ideas or writing of other individuals/authors. _________________________________________________________ AuthorDate ____________ Lab Section # ___________________________ Lab Partner BIOL 1208 Writing Assignment 1 Results Worksheet These are to be written individually even if you worked in a group. Lab Topic: ________________________________________________
Premium Null hypothesis Chemical reaction Hypothesis
When a tree falls in the forest‚ does it make a sound? Ladies and gentlemen‚ and the class of 2016‚ I can definitely assure you that it does. But what is the purpose of worrying about what a silly tree sounds like when it meets its demise? The noise it makes is irrelevant to the bigger picture‚ the falling of one great tree provides room for multiple new saplings to grow in its place. As time goes on‚ this cycle continues and eventually the forest is full of what was once a bunch of young‚ flexible
Premium
Writing Assignment 3 DSSAE100J December 3‚ 2010 The Presentation of Self in Everyday Life “When an individual enters the presence of others‚ they commonly seek to acquire information about him or to bring into play information about him already possessed. They will be interested in his general socio-economic status‚ his conception of self‚ his attitude towards them‚ his competence‚ his trustworthiness‚ etc. Although some of this information is sought as an end in itself‚ there are usually quite
Premium Sociology Actor Acting
conscious of wanting to look squarely at everyone‚ and yet to avoid all eyes” – cannot trust his perspective – notes his role as a narrator “rush out of the house‚ child in arms” – melodramatic – giving the story an imaginary aspect * The presentation of Daisy Buchanan and Jordan Baker Daisy can be read in two ways – trapped in her own life‚ being able to love two man‚ yet both men treat her as possessions / or she simply retreats and cocoons into comfort when things get tough The floaty
Free The Great Gatsby F. Scott Fitzgerald