Cells come from pre-existing cells via division Cells of all organisms fundamentally similar in structure‚ function‚ and metabolic functions Contain hereditary information passed down during cell division A cell’s volume increases faster than it’s surface area Less surface area = less are for nutrient/waste diffusion Solves via: Dividing‚ getting thinner‚ form microvilli‚ store nutrients (Microvilli – within small intestine) Cells are highly organized‚ 3 basic parts Plasma membrane Selective
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SAFETY UNIT IA REVISION NOTES Module PIDAREV.1.1 © RRC Training All rights reserved No part of this publication may be reproduced‚ stored in a retrieval system‚ or transmitted in any form‚ or by any means‚ electronic‚ electrostatic‚ mechanical‚ photocopied or otherwise‚ without the express permission in writing from RRC Training. © RRC Training NEBOSH International Diploma Unit IA – Revision Notes NEBOSH INTERNATIONAL DIPLOMA IN OCCUPATIONAL HEALTH AND SAFETY UNIT IA REVISION NOTES LIST OF
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Chapter 2 Test Review Importance of Cell Division Cell division allows organisms to reproduce‚ to grow‚ and to repair damage. Osmosis- the movement of a fluid‚ usually water‚ across a membrane toward an area of high solute concentration. Diffusion- a transport mechanism for moving chemicals into and out of the cell‚ from an area of higher concentration to an area of lower concentration. Active transport- requires chemical energy Passive transport- requires no energy because the molecules move
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Biol GOD Notes. First Edition 1 L. Leong 2012 Chapter 1: Molecules of Life Cell Theory ∝ All living things are composed of cells and the products of cells ∝ Cells are the basic functional unit of life ∝ All cells arise from pre-existing cells Living Things Unicellular: consisting of one cell Multicellular: composed of many cells ∝ All living things: grow and develop‚ regulate metabolic processes‚ move‚ respond to stimuli‚ reproduce AUTOTROPHS: manufacture their own organic carbon compounds
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Totipotent Cells are undifferentiated cells‚ such as embryonic stem cells‚ that are not yet defined in their function. In animals‚ stem cells are totipotent. Plants have far more types of totipotent cells (Think of how you can make cuttings of plants‚ and grow an entirely new plant‚ given the right conditions?) Cells loose totipotency‚ as‚ with age‚ different genes are swtiched on/off. When certain genes are switched of‚ they are not translated to produce polypeptides‚ meaning cells only have specific
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Unit 4 Physics Notes Sunday‚ November 3‚ 2013 8:09 PM Any Single disturbance is called a pulse A series of pulses is called a wave In the case of the impatient student‚ his disturbance was parallel to the direction of the wave itself. Also called a Longitudinal Wave WAVES • Waves can transmit two things ○ Can transmit energy Ex. Light waves from the sun heat the earth ○ Can transmit information Ex. Radio wave When the motion of the particles is perpendicular to the motion
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Unit 2 Summary notes – Nikhil Pillai Measurements of economic performance Economic growth Two meaning of the term economic growth: - Actual growth‚ increase in real incomes or GDP - Potential growth‚ increase in the productive capacity in a country Real values are adjusted to remove the effects of inflation. Nominal values are current incomes that are not adjusted For GDP to have any significance in terms of standards of living; figures must be given per head (or per capita). E
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Unit 2 Bullet Point Handouts Tests for closely-related species (Compare) DNA; Sequence of bases/nucleotides; DNA hybridisation; Separate DNA strands / break hydrogen bonds; Mix DNA/strands (of different species); Temperature/heat required to separate (hybrid) strands indicates relationship; Compare same/named protein; Sequence of amino acids /primary structure; Immunological evidence – not a mark Inject (seahorse) protein/serum into animal; (Obtain) antibodies/serum; Add protein/serum/plasma
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Cells Cells Cell division and cancer Victoria Brothwell Strayer University Cells Introduction Regular cells and cancel cells are extremely different. Depending on the cancer that one may have cancer cells have more chromosomes that are scattered which is for why cancer cells are formed. In cell division all living things obtain cells in which come from other preexisting cells. If normal cells are do not divide and make new cells then cancer will occur. In order of all cells to be
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transport proteins to other parts of cell smooth endoplasmic reticulum synthesis of lipids and steroids mitochondria double membrane – inner folded into cristae site of later stages of aerobic respiration centrioles one pair found in animal cells made of protein microtubules involved in spindle formation and cellular transport lysosomes digestive enzymes wrapped in membrane breakdown of unwanted structures or old cells nucleolus dense body in nucleus
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