Summary
Summary HISTOLOGY (CELL STRUCTURE) - GRADE 10 IEB LIFE SCIENCE
- Course
- Institution
These are visual and consise notes
[Show more]
Seller
Follow
Snaggyelk
Content preview
The Cell Smallest unit of life.
Organelle (Cell Inclusions) – Membrane-bound structure found cytoplasm &
performs a certain function.
Eukaryote – Has nucleus
Prokaryote – Doesn’t have nucleus.
Differentiation
Size, shape and structure change in order to perform specific functions.
Specialisation
Cells that have developed characteristics in order to perform a particular function.
Muscle Cells
Glandular Cells
Nerve Cells
Protoplasm
Cytoplasm + Nucleus
Endoplasm (Ground Plasm) – Centre
Ectoplasm – Bordering Cell Membrane
Chemical Composition
Inorganic Compounds
Lacks C-H bonds & isn’t produced in cell.
Water
Main component (≤90%)
Serves as solvent median + reagent in chemical reactions.
Gases – Oxygen & Carbon Dioxide dissolve in ground plasma.
Mineral Salts – Sodium Chloride, Phosphates + Potassium ions.
Organic Compounds
Contains Hydrocarbons & produced in cell.
Proteins – Important structural component of membrane, enzymes & some
hormones.
Carbohydrates – Sugars & Starch (energy)
Lipids – Part of cell membranes, stored as reserve energy.
Nucleic Acids – RNA & DNA
Physical Nature of Protoplasm
, NOT EXAMINABLE
Solvent – Liquid in which substance is dissolved (water in biological systems).
Solute – Particles/substance being dissolved.
Solution – Solvent + Solutes
Type Explanation Diagram
True Solution Homogenous Salt
Salts, sugars, gases dissolved
in water
Water
Suspension Heterogeneous
Organelles floating in ground
plasm
Emulsion Solvent & solute both liquid
Colloidal Solution Solute too big to sink but too
small to sink.
Ionized ∴ repel
Aggregate Particles remain in suspension
and form strings/clumps.
Hold water between particles.
States:
Sol – Endoplasm
(Ground plasm)
Gel – Ectoplasm
Reversible
through:
Temperature,
Pressure, pH
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
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.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Snaggyelk. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $8.95. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
59063 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 15 years now