Why do we faint?
I don't know.
Alright, I will explain.
Our brain keeps us conscious and focused.
However, to do so, our brain continuously requires oxygen which is supplied to it through blood.
But sometimes when blood flow is reduced to the brain, it does not get sufficient oxygen.
As a result, we temporarily lose consciousness and faint.
The medical term for fainting is syncope.
Cool name.
Now, the most common causes due to which we faint are shock and stress.
In these cases, our heart rate rises and blood pressure increases.
However, eventually, our vagus nerve which emerges from the brain stabilizes us.
It signals the heart to slow down and decreases the blood pressure.
But sometimes, it malfunctions and drops the heart rate and blood pressure too much.
Reducing blood circulation to the brain.
Due to lack of oxygen in the brain, we faint.
This is called Vasovagal syncope.
What causes heart attacks?
High electricity bills.
No.
A heart attack or myocardial infarction is the complete blockage of blood flow to a part of the heart.
Causing its muscle cells to die.
So sad.
A network of blood vessels called coronary arteries.
Continuously supply oxygenated blood to muscle cells of heart to keep them working properly.
However, due to bad lifestyle choices and stress.
Cholesterol and fats start building in these arteries reducing blood flow to the muscle cells.
This buildup is called plaque.
Plaque is the main culprit behind most heart attacks.
So, shall we put plaque in jail?
Just listen.
When plaque ruptures, a blood clot forms around it causing the artery to get completely blocked.
The blood then cannot pass further to that part of the heart.
Thus, due to lack of oxygen, the muscle cells in that part die.
This condition is called a heart attack.
Why can't you use phones on planes?
Because phones can fall out of the window.
No.
It might be because portable electronic devices like cell phones and tablets emit radio signals.
These signals can interfere with the flight controls.
They may also disrupt the communication with the air traffic controllers on the ground.
Besides this, cellular towers are miles below the airplane.
Hence, cell phones try to emit a stronger radio signal to detect the network.
This can increase the possibility of causing interference with the airplane electronic equipment.
Really.
I didn't know that.
Hence, portable electronic devices are told to be either turned off or to be kept on airplane mode or flight mode.
This prevents the emission of radio signals, thus helping to keep all the on board equipment working properly.
Why is snow white?
Because it applies fairness cream.
No.
Sunlight or white light is a combination of all visible colors of light.
When light falls on an object, it may absorb some colors of light and reflect the remaining colors.
The colors which are reflected by an object make up its color.
For example, when light falls on an apple, it absorbs all other colors except red.
Apple reflects red color making it appear red.
When light falls on coal, it absorbs all colors and does not reflect any color.
Hence, coal appears black to us.
Really.
I didn't know that.
Now, snow does not absorb any colors of light and reflects all of them equally.
As the combination of all colors of light is white light, snow appears white to us.
Why does our stomach growl?
Because there are bears in our stomach.
No.
Growling sound is produced mostly due to movement of gas in the digestive tract, especially in the intestines.
Now gas can either enter or be produced in the intestines.
But how?
When we eat food very quickly, sometimes we swallow gas such as air along with food.
Besides this, bacteria in our intestines also produce gases.
Now during digestion, the muscles of our intestines contract in order to push food ahead.
However, gases also get pushed along with food.
Now, as our intestines are hollow tubes, such movement of gases produces growling sounds.
Besides this, hunger increases growling.
This is because when we are hungry, our digestive system starts preparing for the next meal.
Hence, it clears the remains of last meal causing more muscle contraction.
Thus producing more growling sounds.