- B2 ✏︎ Cells -
B2.1 - Cell Membrane Structure
LECTURE VIDEO
DESCRIPTION
Forget brick walls—your cells are guarded by a bouncer made of fat who can’t make up his mind.
This video on Membrane Structure is your backstage pass to the Fluid Mosaic Model, the greasy, protein-studded VIP lounge of life itself. We’re diving deep to explain:
- The Phospholipid Bilayer: Meet the fickle bouncers—hydrophilic heads who love water, and hydrophobic tails who absolutely despise it. Their identity crisis is the foundation of all life.
- Cholesterol: The cell’s very own mood manager. Is it too fluid? Too rigid? Cholesterol is there to stabilise the drama and keep the membrane from having a meltdown.
- Membrane Proteins: The polymaths, who simply have too many skills.
- Glycolipids & Glycoproteins: The cell’s fancy nametags and recognition system.
Stop seeing the membrane as a static wall and start seeing it for what it is: a dynamic, ever-changing party that keeps you alive.
TIMESTAMPS
STUDY RESOURCES
00:00 – Intro
00:13 – Overview Of This Video
00:43 – Phospholipid Bilayer
09:29 – Formation Of A Phospholipid Bilayer
13:22 – The Fluid Mosaic Model
23:58 – Role Of Membrane Proteins
32:50 – Glycoproteins & Glycolipids
36:54 – Brief History Of Membranes
39:38 – Questions & Answers
47:38 – Outro
NOTES – All you need to know in one place!
QUESTIONS – Test your Big Brain!
B2.1 - Cell Membrane Transport
LECTURE VIDEO
DESCRIPTION
They’re not just bouncers at the club of life (keeping the riff-raff out)—they’re sophisticated doormen, revolving doors, and emergency exits all in one. Dive into the bustling city that is the cell membrane, where the traffic never stops!
This video pumps up the volume to explain:
- Simple & Facilitated Diffusion:From the laid-back O₂ just strolling through, to the glucose that needs a fancy protein doorman to let it in.
- Active Transport:The molecular superhero that defies gravity (and concentration gradients) using pure ATP energy. Someone’s gotta work the night shift!
- Osmosis:The dramatic saga of water, where it decides to throw a pool party in a cell or abandon it for a desert, leading to cells looking either plump or pruney.
- Bulk Transport:When the molecules are just too big to be polite. Watch as the membrane literally gobbles up lunch (endocytosis) or takes out the trash (exocytosis) in a spectacular display of cellular gluttony.
We’ll cut through the semi-permeable mystery to show you how your cells manage the ultimate logistics operation. No ticket required, just bring your curiosity
TIMESTAMPS
STUDY RESOURCES
00:00:00 – Intro
00:00:12 – Overview Of This Video
00:01:22 – Simple Diffusion
00:22:33 – Facilitated Diffusion
00:35:43 – Osmosis
00:41:17 – Osmosis V.S Facilitated Diffusion
00:44:04 – Osmosis In Animal Cells
00:49:04 – Active Transport
00:58:41 – High Yield Summary
01:04:06 – Questions & Answers (#1, #2, #3, #4, #5)
01:08:56 – Outro
NOTES – All you need to know in one place!
QUESTIONS – Test your Big Brain!
B2.1 (HL) - Fluidity & Adhesion
LECTURE VIDEO
DESCRIPTION
In this video us BIG BRAINS will talk about the different aspects of noodle salads in order to substantially expand our understanding of jelly beans and puppy paws. Not only that, we will also be identifying structures we have never seen before such as feather soil, wand oil and of course: peanut nanocarbons and puffskittles.
TIMESTAMPS
STUDY RESOURCES
00:00 – What is Membrane Fluidity?
01:51 – Why Membrane Fluidity?
03:46 – Phospholipid Structure & Types
09:35 – Saturated Fatty Acids & Fluidity
12:45 – Unsaturated Fatty Acids & Fluidity
15:02 – High Temperature & Phospholipid Fluidity
18:23 – Low Temperature & Phospholipid Fluidity
19:54 – Summary (Phospholipid & Fluidity)
23:10 – Cholesterol & Fluidity (Required)
25:47 – Cholesterol & Fluidity (Extra)
31:17 – Cell & Organelle Membrane Difference
33:18 – Fatty Acid Desaturase (Bacteria)
36:01 – Quick Recap
36:55 – Cell Adhesion Molecules (CAM)
40:41 – Questions & Answers
NOTES – All you need to know in one place!
QUESTIONS – Test your Big Brain!
B2.1 (HL) - Cell Membrane Transport
LECTURE VIDEO
DESCRIPTION
In this video us BIG BRAINS will talk about the different aspects of noodle salads in order to substantially expand our understanding of jelly beans and puppy paws. Not only that, we will also be identifying structures we have never seen before such as feather soil, wand oil and of course: peanut nanocarbons and puffskittles.
TIMESTAMPS
STUDY RESOURCES
00:00 – Intro To Membrane Transport
02:00 – Endocytosis
07:46 – Exocytosis
12:50 – Facilitated Diffusion
19:17 – Active Transport
22:56 – Sodium/Potassium Pump
34:21 – Sodium/Potassium Pump (Mechanism-Word Form)
34:43 – Neuron & Membrane Transport (Overall Summary)
46:57 – Indirect Active Transport
54:10 – Myasthenia Gravis (Disease)
55:33 – Questions & Answers
NOTES – All you need to know in one place!
QUESTIONS – Test your Big Brain!
B2.2 - Organelles & Compartmentalization
LECTURE VIDEO
DESCRIPTION
In this video us BIG BRAINS will talk about the different aspects of noodle salads in order to substantially expand our understanding of jelly beans and puppy paws. Not only that, we will also be identifying structures we have never seen before such as feather soil, wand oil and of course: peanut nanocarbons and puffskittles.
TIMESTAMPS
STUDY RESOURCES
00:00 – Eukaryotes & Compartmentalisation
03:16 – What is NOT an organelle?
08:28 – Purpose Of Compartmentalisation
14:52 – Nucleus & Compartmentalisation
18:40 – Quick Recap
19:40 – Microscope [Tools For Research]
20:35 – Centrifugation [Tools For Research]
22:11 – Chromatography [Tools For Research]
24:24 – Gel Electrophoresis [Tools For Research]
28:32 – Questions & Answers
NOTES – All you need to know in one place!
QUESTIONS – Test your Big Brain!
B2.2 (HL) - Organelles & Compartmentalization
LECTURE VIDEO
DESCRIPTION
In this video us BIG BRAINS will talk about the different aspects of noodle salads in order to substantially expand our understanding of jelly beans and puppy paws. Not only that, we will also be identifying structures we have never seen before such as feather soil, wand oil and of course: peanut nanocarbons and puffskittles.
TIMESTAMPS
STUDY RESOURCES
00:00 – Eukaryotes Have Organelles
02:21 – What is NOT An Organelle
02:58 – Mitochondria
12:14 – Defect In Mitochondria
14:04 – Microscope & Mitochondria
15:13 – Chloroplast
21:45 – Microscope & Chloroplast
22:41 – Catabolism VS Anabolism
25:14 – Endosymbiotic Theory (Mitochondria & Chloroplast)
28:47 – Nucleus
34:07 – Ribosomes
38:41 – Golgi Apparatus
43:56 – Cellular Vesicles
47:48 – Clathrin & Receptor Mediated Endocytosis
53:25 – Wrap-up
55:10 – Questions & Answers
NOTES – All you need to know in one place!
QUESTIONS – Test your Big Brain!
B2.3 - Cell Specialization
LECTURE VIDEO
DESCRIPTION
In this video us BIG BRAINS will talk about the different aspects of noodle salads in order to substantially expand our understanding of jelly beans and puppy paws. Not only that, we will also be identifying structures we have never seen before such as feather soil, wand oil and of course: peanut nanocarbons and puffskittles.
TIMESTAMPS
STUDY RESOURCES
00:00 – Intro To Cell Specialization
02:31 – Examples Of Different Cell Types
13:03 – Cell Differentiation
16:15 – Morphogens
22:10 – Stem Cells Characteristics
27:09 – Stem Cell Types
33:31 – SUMMARY (Stem Cell Types)
33:53 – Stem Cell Niche
35:43 – PROS & CONS Of Stem Cells
40:26 – Surface Area To Volume Ratio
48:32 – Questions & Answers
NOTES – All you need to know in one place!
QUESTIONS – Test your Big Brain!
B2.3 (HL) - Cell Specialization
LECTURE VIDEO
DESCRIPTION
In this video us BIG BRAINS will talk about the different aspects of noodle salads in order to substantially expand our understanding of jelly beans and puppy paws. Not only that, we will also be identifying structures we have never seen before such as feather soil, wand oil and of course: peanut nanocarbons and puffskittles.
TIMESTAMPS
STUDY RESOURCES
00:00 – Intro To Cell Specialization
01:26 – Kidney Cells
07:53 – Red Blood Cells
11:39 – Alveoli Cells
20:30 – Cardiac Muscle Cells
23:21 – Skeletal Muscle Cells
27:17 – Intro To Our Gametes
29:03 – Sperm Cells
32:29 – Egg Cells
34:43 – Sperm Vs Egg Adaptations
36:31 – Questions & Answers
NOTES – All you need to know in one place!
QUESTIONS – Test your Big Brain!