Negative Feedback Mechanism

Bio Insight to Healthy Bio Students From a Sick Bio Student ;
Body temperature rises --> skin receptors detect these changes --> Information trnasmitted by neurons to hypothalamus (temperature regulatory centre) --> hypothalamus activates effectors --> blood vessels dilate to allow more blood flow near the body --> more heat is loss to external environment --> sweat glands produce more sweat --> body temperature lowered by evaporation --> SIHAT (:

Monkey Love Made Billions Die

Very INTERESTING. Please read.

Last friday, I went to my bio tuition where the number of students has suddenly increased by multiples -.- And well, Mr Paul the Superhero taught us about the defense mechanism and immunity in our bodies and how it can prevent us from getting death threatening diseases. Well, in this session, we students learned a disturbing yet intesresting fact. Which has been sticking in my mind the two days, its so yuckish.

WHERE DOES HIV COME FROM? HOW COME IT SUDDENLY APPEARED FROM NOWHERE AND KILLING THE CRAP OUT OF PEOPLE?

Mr Paul the Superhero told us that HIV has existed, for a long time. It just didnt attack us beautiful human beings, it only infected monkeys. But God with his Al-Mighty powers has created the monkey with an immunity that it has antibodies and whatever in it to protect them from this disease. Im not saying that they are hebat gila or immortal to HIV. It is dangerous to them too but not fatal.

So, how come this disease that only attack monkeys boleh tiba2 melencong and spread-ed to us humans? NO, it doesnt have to do with darwin's theory that monkey revolved into humans and we're genetically related to them. NO NO, I think thats crap.

There is a scientific reason to this. HIV is transmitted through the transfer of body fluids like semen or blood. This happens when people share needles which are contaminated to inject drugs or have unprotrected sex. Got any clue yet. Yes, OH NO.

There was this stupid african guy who is predicted to have been bloody desperate. I assume he didnt have a partner ; woman or man. So, Mr Paul the Superhero said that this stupid stupid stupid african guy, had intercourse, with a monkey. A big hairy monkey. EEEYUCCKKKK ! Obviously, he didnt wear a condom so this monkey who coincidently had HIV had its fluid mixed with this stupid stupid african guy. So this guy got infected by this monkey and spread this disease to the world.

All because of this stupid guy had to make love with a monkey, the whole world is filled with people dying from HIV. Darn it, he's so stupid!

KNOW YOUR FACTS

Tak boleh bla oh mengancam.
Oh Yeah, I have this book.

No, as dirty as it sounds, its not. Its a book full of really cool facts that we don't know. Let me show you some.

WHY DO YOU CRY WHEN YOU CUT ONIONS?
Cutting an onion releases enzyme called lachrymatory-factor synthase which triggers tears. Scientists tried making a non-crying onion by taking out the enzyme but it seems that the crying enzymes are responsible for the zesty onion flavour. Hmmm, the most reliable way : order take out.

IS IT BAD TO CRACK YOUR KNUCKLES?
Cracking your knuckles isn't as bad as people think. The usual argument is that knuckle popping causes arthritis. Chronic knuckle cracking may cause a decrease in grip strength, but not arthritis. So what causes the pop sound? It's produced in the joints where bubbles burst in the synovial fluid(what?) surrounding the join. Cool eh?

WHAT CAUSES MORNING BREATH?
In Australia, the poo fairy comes at night to take a dump in your mouth.
Well only that part is cute. The others are boring scientific names haha.

WHY DO YOU GET EYEBAGS WHEN YOU ARE TIRED?
The skin around the eyes are the thinnest found in the body and this skin allows dark, venous blood to show through. They appear to be genetic. Easy way: eyes, meet sunglasses. Sunglasses, meet your worst nightmare.

WHY DOES SWEAT STINK AND STAIN?
Have you ever used the term 'sweat like a pig'? Think again. Pigs don't sweat. They don't even have sweat glands, which explains why they wallow in mud to cool off. Sweat is mostly water but there is a small amount of protein and fatty acids in the sweat glands that gives the armpit sweat that wonderful milky or yellow colour. Sweat itself is odorless whether it comes from the arm pit or any part of your body. The funk begins when sweat mixes with bacteria . Its called bromhidrosis -- foul smelling sweat.

WHAT ARE HICCUPS AND HOW TO GET RID OF THEM?
Hiccups are caused when the diaphragm becomes irritated and pushes the air rapidly up. Most cases of hiccups lasts for a few minutes. Some cases of hiccups can last for days or weeks. Hiccups lasting longer than a month are termed incurable. The longest recorded attack of hiccups is six decades. (awesome haha). You could try simple unproven cures:
1.Drink out of a cup from the opposite side of ur mouth
2.Eat a teaspoon of sugar and risking diabetes
3.Pulling the top of ur hair for 2 mins
4.Pulling hard on ur tongue

WHAT YOU NEED TO KNOW ABOUT FART?
The temperature of fart at its time of creation is 98.6 degrees Farenheit. Farts have been clocked at a speed of 10 feet per second ;o Women fart as much as men (danngg) Most people fart 14 times a day. We can ignite farts! Due to hydrogen and methane released. There is some danger associated with igniting fart but fraternity guys doesn't seem to care.

Lastly,
WHY DO MEN HAVE NIPPLES?
During development, the embryo follows a female template until about six weeks, when the male sex chromosome kicks in for a male embryo. So u get the point.

Cool eh? Got lots more but u go buy the book lahh.