Molecular Me: Your Body Is a Communication System

Your body isn’t just a collection of organs. It’s billions of living cells constantly communicating, sensing their environment, exchanging ions, producing energy, and responding to signals. I like to view it as particles of sand all different colors that talk while they work in an electromagnetic toroidal field.
Today, we are going to talk about a useful way to understand molecular biology. We will do so by following one signal all the way from the outside of a cell to what happens inside it.

🕵🏼Start with the cell membrane

Every cell has a membrane made primarily of a phospholipid bilayer.

Think of it as the cell’s security boundary.

It decides what enters, what leaves, and how the cell communicates with its surroundings.

But here’s the really cool part:

The membrane isn’t electrically neutral.

Cells maintain different concentrations of ions on either side of the membrane.

Especially:

Na⁺ — sodium
K⁺ — potassium
Ca²⁺ — calcium
Cl⁻ — chloride

That separation creates an electrochemical gradient.

So when we say the body is “bioelectric,” this is one of the fundamental reasons why.

Ion channels are the gates

The membrane contains specialized proteins called ion channels.

They’re essentially molecular gates.

Some respond to:

• voltage
• chemicals
• mechanical force
• temperature
• intracellular signals

That’s where our earlier ‘Molecular Me’ posts  about VGCCs comes in—and as we have covered in different words in those:

VGCC = voltage-gated calcium channel.

A change in membrane voltage can cause the channel to open.

Then:

Ca²⁺ enters the cell

and suddenly you’ve generated a powerful intracellular signal.

Your environment can become a cellular signal

Here’s where we can introduce mechanobiology.

Cells are constantly experiencing physical forces:

• pressure
• stretch
• shear
• vibration
• fluid movement

Cells have molecular structures capable of sensing some of these mechanical changes.

These are called mechanosensors.

Some are mechanosensitive ion channels.

So we can have:

mechanical force

↓

mechanosensitive channel

↓

Ca²⁺ enters

↓

cellular signaling

This a real biological phenomenon.

And it’s one reason when people pose the question about vibration and tuning forks (ie; if they can heal specific health issues such as fluid redistribution) as I have, it becomes a legitimate mechanobiology question—even though researchers don’t have evidence that particular tuning-fork frequencies redistribute whole-body fluid. This mechanism isn’t “far-fetched”—analyzing data would prove beneficial in a setting where fluid has risen and gotten “stuck” in the nasal passages and the upper lymphatic system causing inflammation and other symptoms.

Knowing calcium is more than a mineral is essential 

When we talk about calcium in molecular biology, we’re often talking about calcium signaling, not simply dietary calcium.

Ca²⁺ acts as a second messenger.

That means a signal from outside the cell can ultimately produce a calcium signal inside the cell.

And calcium can tell the cell to:

• contract
• release neurotransmitters
• secrete hormones
• activate enzymes
• change metabolism
• alter gene expression
• communicate with mitochondria

So:

environmental signal → channel → Ca²⁺ → cellular response

This is one of the fundamental communication pathways in biology.

Then we reach the mitochondria

Your mitochondria are constantly converting chemical energy from food into usable cellular energy.

The molecule everyone learns about is (and we have covered in multiple ’Molecular Me’ blog posts):

ATP — adenosine triphosphate.

ATP is essentially one of the cell’s primary energy currencies.

The simplified story is:

food

↓

metabolism

↓

NADH/FADH₂

↓

electron transport chain

↓

proton gradient

↓

ATP synthase

↓

ATP

And here’s where molecular biology gets a lot of attention because its interconnected:

Calcium ↔ mitochondria ↔ ATP ↔ reactive oxygen species

Calcium isn’t just involved in signaling—it also interacts with mitochondrial metabolism.

Reactive oxygen species aren’t automatically “bad”

You may hear the phrase oxidative stress and assume:

ROS = bad.

It’s more complicated.

Your cells naturally produce reactive oxygen species (ROS).

They participate in normal signaling and immune defense.

The problem is when ROS production and the body’s antioxidant/repair systems become imbalanced.

That’s what is called:

Oxidative stress

So:

ROS production

versus

antioxidant/repair capacity

↓

redox balance

If the balance becomes unfavorable:

oxidative stress can affect lipids, proteins, DNA and cellular structures.

By  Now let’s zoom out from the cell: Your blood vessels are living tissue

Let’s talk about endothelial cells a moment.

These are the specialized cells that form the inner lining of your entire circulatory system—from the largest arteries down to microscopic capillaries.

And they aren’t simply a layer of cells sitting there while blood passes by.

They are constantly sensing their environment.

Every second, endothelial cells are exposed to:

• Blood-flow shear stress — the friction created as blood moves across the cell surface
• Blood pressure
• Stretch of the vessel wall
• Chemical signals
• Oxygen and nutrient availability
• Inflammatory signals
• Changes in calcium
• Signals from surrounding cells

This makes the endothelium a kind of biological sensing and communication interface between the bloodstream and the tissues.

🩸 Here’s the molecular conversation

Imagine blood flowing through an artery.

The movement of that blood creates a mechanical force called shear stress.

The endothelial cell detects that mechanical force through structures on and around its membrane, including the glycocalyx, ion channels, junctional proteins, and cytoskeletal structures.

That mechanical information can then be converted into a biochemical signal.

This process is called:

Mechanotransduction

In simple terms:

The cell converts a physical force into a biological signal.

And this is where our our bioelectricity comes into play.

A simplified pathway can look like:

Blood flow

↓

Shear stress

↓

Endothelial mechanosensing

↓

Ion-channel / intracellular signaling

↓

Ca²⁺ signaling

↓

Nitric oxide (NO) production

↓

Relaxation of vascular smooth muscle

↓

Blood vessel dilation

↓

Changes in blood flow

🧬 But endothelial cells do much more than control blood flow

They’re also involved in regulating:

🩸 Vascular tone
How constricted or relaxed your blood vessels are.

💧 Permeability
How easily water and molecules move between the bloodstream and surrounding tissues.

🛡️ Inflammation
They help regulate whether immune cells can interact with or move through the vessel wall.

🩸 Blood clotting
The endothelium helps maintain a balance between clot formation and preventing unnecessary clotting.

🧪 Hormonal and chemical signaling
Endothelial cells produce and respond to numerous signaling molecules.

🔋 Metabolism
They communicate with surrounding tissues and participate in metabolic regulation.

🧠 Neurovascular communication
Blood vessels respond to signals from the nervous system and help regulate blood flow to different tissues, including the brain.

And here’s the part I really think remembering would later prove beneficial:

Your cardiovascular system isn’t as simple as:

heart → pipes → blood.

It’s more like:

heart → living sensing network → blood vessels → tissues → feedback to the nervous/endocrine systems.

The endothelial cells are part of that communication network.

They are constantly asking:

👉🏼How fast is the blood moving?
👉🏼How much pressure am I experiencing?
👉🏼Am I being stretched?
👉🏼What’s happening chemically around me?
👉🏼Do I need to relax this vessel?
👉🏼Do I need to tighten it?
👉🏼Should immune cells be allowed through?
👉🏼Should this area become more or less permeable?

And then they translate those environmental signals into cellular responses.

This is the vocabulary connection for today’s ‘Molecular Me’ post:

Physical environment
↓
Mechanical force
↓
Mechanosensing
↓
Mechanotransduction
↓
Ion channels / signaling pathways
↓
Ca²⁺
↓
Nitric oxide and other signaling molecules
↓
Vascular response
↓
Whole-body physiology

Endothelial biology is such an interesting bridge between physics, bioelectricity, molecular biology, and human physiology. 

And it gives learners—such as myself—a really good example of what is meant when professionals say:

“The body doesn’t just experience its environment. Its cells are constantly sensing and responding to it.”

And this is where the nervous system comes in 

(author side note: My central nervous system has degraded from EHS related stress. Repairing it became a fundamental reason for me wanting to learn bioelctric health with the aim to help others see how foundational it is to our health and wellbeing.)

Neurons are also electrical cells.

They maintain membrane potentials and communicate through electrical and chemical signals.

A simplified neuron sequence is:

stimulus

↓

membrane voltage changes

↓

ion channels open

↓

Ca²⁺ signaling

↓

neurotransmitter release

↓

another cell receives the signal

The sequence outlined here is describing the standard mechanism of excitation-secretion coupling at a chemical synapse:

This is why the language of electricity, ions, calcium, membranes and signaling keeps appearing throughout physiology.

Electrochemical signaling is fundamental to life. 

FYI: External fields interface with the electrochemical signaling sequence at specific physical and biochemical junctions.