The human body some amazing  question ?

The Amazing question and Answer Following: -

1. How do we think ?



What are thoughts? This question will
keep scientists, doctors and
philosophers busy for decades to
come. It all depends how you want to
define  the term ‘thoughts’. Scientists
may talk about synapse formation,
pattern recognition and cerebral
activation in response to a stimulus
(seeing an apple and recognising it).
Philosophers, and also many
scientists, will argue that a network of
neurons cannot possibly explain the
many thousands of thoughts and
emotions that we must deal with. A
sports doctor might state that when
you choose to run, you activate a series
of well-trodden pathways that lead
from your brain to your muscles in less
than just a second.
There are some specifics  we do
know though – such as which areas of
your brain are responsible for various
types of thoughts and decisions.


 2.Why can some people roll their tongues but others can’t?






Although we’re often taught in school that
tongue rolling is due to genes, the truth is
likely to be more complex. There is likely
to be an overlap of genetic factors and
environmental influence . Studies on
families and twins have shown that it
simply cannot be a case of just genetic
inheritance. Ask around – the fact that
some people can learn to do it suggests
that in at least some people it’s
environmental (eg- a learned behaviour)
rather than genetic (in born).

3. What is a pulse?



When you feel your
own pulse, you’re
actually feeling the
direct transmission
of your heartbeat
down your artery.
You can only feel a
pulse where you
can compress an
artery against a
bone, eg :-  the radial
artery at the wrist.
The carotid artery
can be felt against
the vertebral body,
but beware, if press
too hard and you
can actually faint,
press both at the
same time and
you’ll cut off the
blood to your brain
and, as a protective
mechanism, you’ll definitely  faint!


4. In the mornings, do we wake up or open our eyes first ?


Sleep is a gift from nature, it is good for health which is
more complex than you think. There
are five stages of sleep which represent
the increasing depths of sleep – when
you’re suddenly wide awake and your
eyes spring open, it’s often a natural
awakening and you’re coming out of
rapid eye movement (REM) sleep,  you
may well remember your dreams. If
you’re coming out of a different phase,
eg:-  when your alarm clock goes off, it
will take longer and you might not
want to open your eyes straight away!



5.Do eyeballs grow like the rest of the body?


Only a small amount –
this is actually why
babies appear to be so
beautiful, as their eyes
are out of proportion
and so appear bigger.


6.What’s my field of vision in degrees?


The human field of vision is just about 180
degrees. The central portion of this
(approximately 120 degrees) is binocular or
stereoscopic – ie, both eyes contribute,
allowing depth perception so that we can
see in 3D. The peripheral edges are
monocular, meaning that there is no
overlap from the other eye so we see in 2D.

7.How fast does blood travel round the human body?


you all are know that the  total ‘circulating volume’ is near  about five litres. Each red blood cell within this has to go from your heart,

down the motorway-like arteries, through the
back-road capillary system, and then back through the
rush-hour veins to get back to your heart. The process
typically takes about a minute. When you’re in a rush
and your heart rate shoots up, the time reduces as the
blood diverts from the less-important structures (eg :- 
large bowel) to the more essential (eg :- muscles).


8. Is it possible to keep your eyes open when you sneeze?


Your eyes remain shut as a
defence mechanism to prevent
the spray and nasal bacteria
entering and infecting your
eyes. The urban myth that
your eyes will pop out if you
keep them open is unlikely
to happen – but keeping
them shut will provide
some protection against
nasty bugs and viruses.



9. Why do we only remember some dreams?


Dreams have fascinated humans
for thousands of years. Some
people think they are harmless
while others think they are vital to
our emotional well being. Most
people have four to eight dreams
per night which are influenced by
stress, anxiety and desires, but
they remember very few of them.
There is research to prove that if
you awake from the rapid eye
movement (REM) part of your sleep
cycle, you’re likely to remember
your dreams more clearly.

10.Which organ uses up the most oxygen?


The heart is the most
efficient  – it extracts
80 per cent of the
oxygen from blood.
But the liver gets the
most blood – 40 per
cent of the cardiac output compared to
the kidneys, which get 25 per cent, and
heart, which only receives 5 per cent.


11.Why do we get a high temperature when we’re ill?

The immune response leads to inflammation and the release of
inflammatory factors into your blood stream. These lead to an increased
heart rate and blood flow, which increases your core body temperature– as if your body is doing exercise.
 This can lead to increased heat
production and thus dehydration, for this reason, it’s important to
drink plenty of clear fluids when you’re feeling unwell.

12.Why does cutting onions make us cry?


Onions make your eyes water due to their expulsion of
an irritant gas once cut. This occurs as when an onion
is cut with a knife, many of its internal cells are broken
down, allowing enzymes to break down amino acid
sulphoxides and generate sulphenic acids. These
sulphenic acids are then rearranged by another
enzyme and, as a direct consequence, synpropanethial-
S-oxide gas is produced, which is volatile.
This volatile gas then diffuses in the air surrounding
the onion, eventually reaching the eyes of the cutter,
where it proceeds to activate sensory neurons and
create a stinging sensation. As such, the eyes then
follow protocol and generate tears from their tear
glands in order to dilute and remove the irritant.
Interestingly, the volatile gas generated by cutting
onions can be largely mitigated by submerging the
onion in water prior to or midway through cutting,
with the liquid absorbing much of the irritant.

13. Why do some hereditary conditions skip a generation?


Genes work in pairs. Some genes are
‘recessive’ and if paired with a
‘dominant’ half, they won’t shine
through. However, if two recessive
genes combine (one from your
mother and one from your father),
the recessive trait will show through.


13.Why do we blink?

Blinking helps keep your eyes clean and moist. Blinking
spreads secretions from the tear glands (lacrimal  fluids)
over the surface of the eyeball, keeping it moist and also
sweeping away small particles such as dust.


14.Why do we get angry?


As far as we know, anger is one of the
oldest and most primitive forms of
emotion. It is believed to have been
hard-wired in our brains many thousands of
years ago, to help us survive tougher times.
Back then, resources like food, potential mates
and shelter were relatively scarce. Anger was
therefore a vital emotion, giving our ancestors
the necessary drive and power to survive when
their safety, or chance to mate, was threatened.
Although our lives are less frequently in
danger than our ancestors’ our brains still
react to certain anger triggers, one of which is being treated unfairly. As soon as someone
shouts at you or gives you an angry look, the
amygdala in your brain sounds the alarm,
prompting the release of two key hormones –
adrenaline and testosterone – which prime the
body for physical aggression.
As well as the amygdala, the prefrontal cortex
is also activated by the anger trigger. This part
of the brain is responsible for decision-making
and reasoning, making sure you don’t react
irrationally to the situation. According to
studies, the time between initially getting
angry and the more measured response from the prefrontal cortex is less than two seconds.
This would explain the popularity of the
age-old advice of counting to ten if you feel your
blood boiling.
It’s widely accepted that men and women feel
anger differently. Women are more likely to feel
anger slowly build up, which takes time to
diffuse, where as men are more likely to
describe the feeling as a fire  raging within them
that quickly eases. This is thought to be due to
men having a larger amygdala than women,
and is why a man is statistically more likely to
be aggressive than a woman.

15.Can getting angry be good for you?


Many people view anger as a
negative emotion that wastes
energy and has no benefits . Yet as
with all human emotions, anger
has evolved to serve an
evolutionary purpose. Having said
this, getting angry will only have a
positive effect if it is used in the
correct way. If we sit down and
discuss why someone or
something has made us angry,
then anger is working in the right
way; if we can’t regulate our anger
response, it’s unlikely to improve a
situation in the long run. Studies
have shown that releasing anger in
a rational way is actually good for
you. On the other hand, storing
anger up is known to negatively
affect certain people, potentially
leading to depression. Constant,
chronic anger can lead to high
blood pressure and even heart disease in the long term.

16.How quickly does human hair grow?


Human hair grows on average 1.25 centimetres (0.5
inches) per month, which is equivalent to about 15
centimetres (six inches) per year. There are several
variables that can affect hair’s growth rate such as age, health
and genetics. Each hair grows in three stages, the first  being
the anagen phase where most growth occurs. The longer your
hair remains in this stage dictates how long and quickly it
develops, this can last between two and eight years and is
followed by the catagen  and telogen 
phases. Hair growth rates vary across different areas of the
head, with that on the crown growing the fastest.


17.How does stress affect the body?

The hypothalamus is a small structure that sits in the middle of the
brain. It makes two key chemicals that kick-start the stress
response: - corticotropin-releasing hormone and vasopressin.
Corticotropin-releasing hormone, as the name suggests, triggers the
release of a second chemical called corticotropin. This travels in the
bloodstream to the adrenal glands, which sit on top of the kidneys, and signals for them to make the steroid hormone cortisol.
Cortisol is also known as the ‘stress hormone’ and it has effects all
across the body. It helps to return systems to normal during times of
stress, including raising blood sugar, balancing pH and suppressing the immune system.
 Vasopressin also travels in the blood to the kidneys, but
its function is slightly different. It increases the re-uptake of water,
decreasing the amount of urine produced and helping the body to hold on to the reserves that it has. 


18.Are there other ‘funny bones’ in the body?



The term ‘funny bone’ is misleading because it
refers to the painful sensation you experience
when you trap your ulnar nerve between the
skin and the bones of the elbow joint. This happens in
the so-called cubital tunnel, which directs the nerve
over the elbow but has little padding to protect against
external impacts. The ulnar nerve takes its name from
the ulna bone, which is one of two bones that runs
from the wrist to the elbow, the other is the radial bone,
or radius.
No other joint in the human skeleton combines these
conditions and duplicates the this erroneously named
reaction so we only have one ‘funny bone.


THE END AND SHARE IT