Bio Revision zzz...

heys...
studying for bio now...
sianzzz.
bio so boring... anyways bio revision:

What is a reflex action?
A reflex action is an immediate response to a specific stimulus in higher animals.

State two reflex actions involving glands as effectors.
Upon seeing sour plum, salivary glands secrete saliva.
When dust gets into eyes, tear glands secrete tear.

Describe a simple spinal reflex action.
An example is when the hand touches a hot object unknowingly. The heat from the object stimulated the nerve endings in one's skin. Nerve impulses produced travel along the sensory neurone to the spinal cord. In the spinal cord, nerve impulses are first transmitted across a synapse to a relay neurone and then transmitted across another synapse to the motor neurone. The nerve impulses leave the spinal cord along the motor neurone to the effector which is the biceps muscle in the upper arm. The muscle then contracts to withdraw the hand suddenly.

State a test which must be carried out necessarily before exposing the plant to light and explain why.
Starch test. This to ensure that no starch was present before the experiment, and that the starch detected at the end was produced during the experiment.

What is the role played by A and B at birth?
A, the uterine muscles contracts and relaxes rigoriously to help pushing the baby out of the womb at birth. B, the amniotic fluid, acts as a lubricant to reduce friction in vagina at birth.

Name fluid X and explain the importance of this fluid.
This is the pleural fluid. It reduces the friction between the lungs and the inner surface of the thoracic cavity during the ventilation movement.

Explain the function of muscle type M in inspiration.
During inspiration, intercoastal muscles contract to move the ribs and the sternum forwards and upwards. The cross-sectional area of the chest decreases, thus the pressure in the lungs inreases, as a result air flows into the lungs.

A man was struck on the sternum by a fist. State and explain the immediate effect on his breathing.
The sternum was being pressed backwards, reducing the cross-sectional area of the chest, thus increasing the lung pressure that gushes air out of the mouth and nose.

Label A and B.
A is the erector muscle. B is the blood capillaries.

Describe and explain the immediate responses of A and B when cold water was splashed onto the skin suddenly.
A will contract to pull hairs to stand on one end to build a barrier to trap air and prevent heat loss. The arteriole constricts to reduce blood flow into the capillary B to conserve heat in the blood.

See what i mean?
Boring eh?
bye...
go explore for games a while
Jiayou for Bio!
Anythinglala*

???

Heys...
today no school haha
for a friday?
i oso dunno why la but no schl
means gd news rite?
HAHAS...
anyway got my report bk ytd...
8th in class!
gd or not?
but i was 7th in class previously...
zzz...
Dropped 1 position gd or not?
zzz...
54th in schl
gd or not?
but i was 27th in schl previously...
gd or not?
zzz...
:( or :)?
why?
Anythinglala?

POOR RESULTS

heys...
sianzzz...
nth to do now jus finished some lame miniclip games
Sianzzz summing up my poor results(EOY):
English:
Failed compre, summary, but overall jus pass i tink
sad case lor sometimes very hard explain
just a bad day ba... so quite sad:(
Chinese:
Got A2 haha!!! but didnt get A1 zzz
quite close i tink
Biology:
EOY BIO quite no time study, so i shld be
satisfied with B4?
Chemistry:
Distinction!!!
But i actually hoped to get first
cos chem paper on my bday... :(
Physics:
Distinction!!!
But no A1 zzz
quite close to A1
Amaths:
Distinction... but got a lot careless mistakes
Emaths:
Distinction... but some qns i could hav do if
got more time
SS:
Distinction, but SEQ quite lan shld improve there
SBQ pulled me up heng
History:
Distinction, again SEQ can be higher de
no time i tink shld train write faster

Thats all!!! zzz quite sad
this time tio owned by many of my frens...
cos of EL, BIO mostly...
zzz...
anyway today ti yu biao yan quite cool,
all sports gathering to help schl
Today SEc 4 Grad Nite veri sianzzz
wait so long to end
still got punished and stayed back for some
sai kan job... moving tables, chairs...
zzz... So Sianzzz!
kk thats all...
bb
Anythinglala*

Exams are over!!!

Yea! Exams are finally over!!!
Now to sum up:
Amaths was average got 2-3 qns not veri sure...
SS i reali study hard for Sri Lanka but then only one part got Sri Lanka and the other was Northern Ireland which i forgotten so i wrote SEQ on Singapore...
Tink i wouldnt score well for SS quite disappointed... (em0)
EL was difficult for passage A but passage B quite ok
History Hooray Came out on WHY ALLIES WIN AND MOVING TOWARDS WAR
which i study hard on and could do but didnt reali finish it quite abrupt
Chem was a difficult paper for all but i could handle it haha got some careless mistakes though
but i study quite a lot during weekends as i didnt care bout Physics
yea Physics for the first time i didnt screw it!!! Hooray! I didnt learn much but thankfully revison for the class and common tests helped me a lot hopefully can get first Physics A1 in a major examination
chinese got some hanzi wrong sianzzz but i didnt learn much cos physics paper ended quite late
Bio is probably my worst paper this time cos the lack of time to study plus the many memorising stuff that simply makes me puke... B4 would be a realistic target
Emaths was quite tough i was doin until very happy cos first few qns i like all know but Q7, 8 i both stuck then no paper so i took a total of 3 papers more cos got some pages i cancel off my wrong workings... minus a t least 10 marks... most probably more... emo...
Yea!!!
thats all for the EOY stuff...
Now for the results ba...
Hopefully i can score well as i have a habit of blowing it up in EOY...
My CA all quite impressive sia... lolz
i tink so given my standard...
haha now hearing Jay Chou 稻香 quite nice i like it...
hahas shall go relax by playing more com games...
Bye!
Anythinglala*
PS: Gd luck to my cousin for he goin to take Olvls soon!!! Jiayou!