Entrevista
UNIT 1 CELL BIOLOGY IB SL/HL NOTES
Unit 1: Cell biology class notes, summarised with pictures.
[Mostrar más]Vista previa 3 fuera de 26 páginas
Vista previa 3 fuera de 26 páginas
Añadir al carritoLibro relacionado
Título del libro:
Autor(es):
- Edición:
- ISBN:
- Edición:
Vendedor
Seguir
Vista previa del contenido
UNIT 1 CELL BIOLOGYCONTENTS
1. CELL INTRODUCTION.......................................................................2
Cell theory.........................................................................................................................................2
Functions of life.................................................................................................................................3
Surface area: Vol ratio.......................................................................................................................4
Magnification.....................................................................................................................................5
Emergent properties..........................................................................................................................5
Cell differentiation.............................................................................................................................5
Stem cells...........................................................................................................................................6
Stem cell therapy...............................................................................................................................6
2. ULTRASTRUCTURE OF CELLS............................................................8
Prokaryotic cells.................................................................................................................................8
Eukaryotic cells..................................................................................................................................9
Organelles........................................................................................................................................10
Electron Microscopy........................................................................................................................11
3. MEMBRANE STRUCTURE................................................................12
Phospholipid bilayers.......................................................................................................................12
Membrane proteins........................................................................................................................12
Cholesterol.......................................................................................................................................13
Models of membrane theory...........................................................................................................14
4. MEMBRANE TRANSPORT................................................................15
Types of transport...........................................................................................................................15
Simple diffusion...............................................................................................................................15
Osmosis...........................................................................................................................................15
Facilitated diffusion.........................................................................................................................16
ATP (active transport)......................................................................................................................16
Vesicular transport..........................................................................................................................17
Bulk transport..................................................................................................................................17
5. ORIGIN OF CELLS..........................................................................18
Biogenesis........................................................................................................................................18
Non-living synthesis.........................................................................................................................18
Endosymbiosis.................................................................................................................................19
6. CELL DIVISION..............................................................................20
Cell cycle..........................................................................................................................................20
1
, Interphase........................................................................................................................................21
DNA supercoiling.............................................................................................................................21
Mitosis.............................................................................................................................................22
Cytokinesis.......................................................................................................................................23
Mitotic index....................................................................................................................................23
Cyclins..............................................................................................................................................24
Cancer development........................................................................................................................25
1. CELL INTRODUCTION
Cell theory
o The cell is the smallest unit of life.
2
, o All living organisms are composed of cells.
o All cells come from pre-existing cells.
Exceptions to cell theory
Striated muscle
o Skeletal muscle fibres fuse together and are larger
(30cm)
o Multiple nuclei surrounded by a single plasma
membrane.
o Doesn’t follow the rule which says cells function as
autonomous units.
Giant algae
o Single celled organism challenged the idea of small and
simple structure.
o Complex structure made up of 3 anatomical parts.
o Challenge the idea larger organisms are made of many
microscopic cells.
Aseptate fungal hyphae
o Challenges idea that a cell is a single unit
o Hyphae are large, many nuclei
o Continuous cytoplasm
o No division between cells
Red blood cell
o Don’t have a nucleus
Functions of life
An organism must fulfil all live processes to be considered a living
organism.
o Metabolism (respiration) undertake essential chemical reactions
o Reproduction produce offspring, sexually or asexually
o Sensitivity responsive to internal and external stimuli
o Homeostasis maintain a stable internal environment
(temperature in humans)
o Excretion remove waste products
o Nutrition exchange materials and gases with the environment
o Growth can move and change shape and size
Application
Paramecium (heterotroph)
3
Los beneficios de comprar resúmenes en Stuvia estan en línea:
Garantiza la calidad de los comentarios
Compradores de Stuvia evaluaron más de 700.000 resúmenes. Así estas seguro que compras los mejores documentos!
Compra fácil y rápido
Puedes pagar rápidamente y en una vez con iDeal, tarjeta de crédito o con tu crédito de Stuvia. Sin tener que hacerte miembro.
Enfócate en lo más importante
Tus compañeros escriben los resúmenes. Por eso tienes la seguridad que tienes un resumen actual y confiable. Así llegas a la conclusión rapidamente!
Preguntas frecuentes
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
100% de satisfacción garantizada: ¿Cómo funciona?
Nuestra garantía de satisfacción le asegura que siempre encontrará un documento de estudio a tu medida. Tu rellenas un formulario y nuestro equipo de atención al cliente se encarga del resto.
Who am I buying this summary from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller saragrate. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy this summary for 5,49 €. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
45,681 summaries were sold in the last 30 days
Founded in 2010, the go-to place to buy summaries for 15 years now