Tag Archives: membranes

B2 Cells (Combined Science)

All of B2 Revision notes in downloadable word format and here are the key terms and definitions: Key terms B2

GCSE Bitesize – Cell Activity – covers animal & plant cells, movement in & out of cells & cell division (18m). Science in Focus – Cell Biology – a 19m video.

How about seeing some real cells in action? Here is a Trachelius ciliate feeding on a Campanella ciliate, and here is a Paramecium feeding:

For self-assessment questions, with exercises and discussions, just click on the correct topic at Biology GCSE & IGCSE Question Bank. Powerpoints can be downloaded from the same site here. The s-cool revision site lets you revise the topic, summarizes the topic & tests you on it. Skoool gives you a lesson, including progress questions, for each Biology topic but you’ll need sound on for it. 

793px-Organization_levels_mouse.svg

 

Just click to enlarge (thank you LadyofHats).

 

 

 

 

B2.1 CELL STRUCTURE

Science Bank 9 (Cells & Tissues): Part 1- Animal Cells (to 4m 25s); Part 2 – Plant Cells (to 9m 10s); you do not need Part 3.

A short video from The Virtual School about cells & specialized cells:

B2.2 MOVEMENT IN & OUT OF CELLS

You only need to know about the first two sections (diffusion):

Ks4 movement in and out of cells from SUSAN MATHEW

Topic 1 Cell Biology

 

Here are some past essay questions: Topic 2 Cells essay qus

Here are video tutorials for many assessment statements in topic 1 – just click on the one you want. Thank you to Stephanie Castle (at UNIS, New York).

How about seeing some real cells in action? Here is a Trachelius ciliate feeding on a Campanella ciliate, and here is a Paramecium feeding.

And here is a cool animation showing the dynamic world that is the inner life of a cell (the second version is narrated):


A great revision quiz from Mr Exham, covering topic 1:

IB Biology Revision Quiz – Core 1 Cell Biology from mrexham

1.3 Membrane Structure

800px-Cell_membrane_detailed_diagram_en.svg

Endomembrane_system_diagram_en.svg

 

 

The endomembrane system of the cell (click to enlarge)

 

 

 

 

Bioknowledgy DP 1.3 Membrane structure from Chris Paine (at Dulwich College Shangai) – taken from his fabulous bloBioKnowledgy.

1.3 Membrane Structure notes to complete (created by Ms Green).

A 14m lesson from Dan Rott:

Here Stephanie Castle explains 1.3 Drawing the Fluid Mosaic Model in a 2m video. Mr Andersen covers Cell Membranes in 11m and here is the history of membrane structure models in 11m.

A short, simple animation demonstrating membrane  fluidity (from St Olaf) and Cell Membranes are way more complicated than you think (a 5m TED-Ed video)

1.4 Membrane Transport

BioKnowledgy 1.4 Membrane transport from Chris Paine (at Dulwich College Shangai) – taken from his fabulous blog BioKnowledgy.

1.4 Membrane Transport notes to complete (created by Ms Green).

A 13m 35s video lesson from Dan Rott:

Some assessment statements are covered in videos by Stephanie Castle.

Click on ‘Cellular Transport’ to see an interactive animation from Wiley that covers diffusion, osmosis, passive transport & active transport. Or here for an animated, narrated tutorial on how molecules move across the cell membrane (from Sinauer Associates).

DIFFUSION

A short, simple animation demonstrating diffusion (from St Olaf) and here are two fantastic animated, narrated tutorials from McGraw Hill Education – how diffusion works & diffusion through cell membranes.

FACILITATED DIFFUSION

Short, simple animations demonstrating facilitated diffusion with a channel protein and with carrier proteins – three types: uniport, symport, & antiport  (from St Olaf).

An animated, narrated tutorial on the three types of carrier proteins (from Sinauer Associates).

Or here are is a fantastic animated, narrated tutorial from McGraw Hill Education – how facilitated diffusion works.

OSMOSIS

A short, simple animation demonstrating osmosis (from St Olaf) or here are two fantastic animated, narrated tutorials from McGraw Hill Education – osmosis & how osmosis works.

ACTIVE TRANSPORT

A short, simple animation demonstrating Secondary Active Transport – the Na/K pump coupled with the glucose/Na symport (from St Olaf).

ENDOCYTOSIS & EXOCYTOSIS

A short, simple animation demonstrating phagocytosis (from St Olaf) or here is a fantastic animated, narrated tutorial from McGraw Hill Education – Endocytosis & Exocytosis – which includes a quiz.

And here is an animated, narrated tutorial on vesicle budding &  fusing which also includes a quiz (from Sinauer Associates).

Here Paul Andersen gives you a brief introduction to The Cell Membrane.

Mr W’s Cell Membranes rap is good revision as is his Osmosis! rap.

In Crash Course Biology #5 – In Da Club – Membranes & Transport, Hank describes how cells regulate their contents and communicate with one another via mechanisms within the cell membrane.

PRESCRIBED PRACTICAL 2 – Osmolarity

Estimation of osmolarity in tissues by bathing samples in hypotonic and hypertonic solutions

Osmolarity – notes from BioNinja

Estimation of osmolarity in tissues, a 7m video from Stephanie Castle; Diffusion & Osmosis, various LabBench Activities from Pearson