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日七月三年五八九一展公年四十七國民華中
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Vicking
starcie
glucose
Fdistilled water
After several hours
glucose was found in
1985
tubing
生
中學會考試題預習專欄
物 明德出版社2
broker
(廿五)
梁偉宏提供資料
BIOLOGY (25)
KAW: LEUNG
MILL & DALE PRESS TID.
Unit 11: Revision Test
13. The following diagram
shows the internal structare of part of the cortex of the mammalian kidney.
from renal artery"
a) Name the structure X
b) Name and, explain the
process by which water and dissolved
substances in X tends to pass into the cap like structure Y.
Name the fluid vin
the diagram
What is the main nitrogenous-vaste iD. the fluid 2?
(iii)where and brow is
this nitrogenous-
waste produced?
(1) Give three substances
which are present in fluid but abwent in urine,
(ii)What has happened to
these substances
originally present
in fluid Z?
The following.
the distilled water.
a) What process und
occured to ensure the
glucose to pass out of| the tubing?
b) Explain why the starch remains in the tubing?
reagents you should use and indicate the results you would expect for testing the presence of
Suggest the.
(i) storch inside the
tubing
(ii)glucose in the water
d). If the distilled water
was replaced with
concentrated salt.
solution, would
glucose pass
迅
out of
the tubing? Explain. your answer.
If the Visking tubing represents the intestine, then what does the distilled water represent?
15. The following diagram
shows a general plan of blood circulation in mammals..
L: liver
I
intestine
K kidney
Explain why the blood. in the circuit
(i) can flow constantly.
(ii) can flow 'forward.
地泥
without back-flow.
apparatus was set up.
b).
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機敦照
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Name the chumber. X.
contracts, to which organ is the bloud in it sent?
(1)) When thamber X
(iii)Explain why the wall of chamber is.
thicker than that of chamber X.
What are the
differences in the composition of the blood in
(a): chamher x and Y. (ii) bload vessel A and
B
(iii)blood vessel-C and
D.
d)
(i) Nume
the blood vessel A and state ita. function..
(ii)What is the feature:
of'portal vessels?
e). Name two hormones
which speed up the circulation.
Suggested Answers.
13.
a)X:glemercular.
capillaries,
Y:Bowmania capsule.
b) Ultrafiltration,
Since the diameter of the afferent arteriole is greater than that. of the efferent arteriale, a high blood pressure is developed ingide: the capillaries. This pressure forces water and dissolved
Diffusion,
The starch molecules. are too large to pass through the selective Visking tubing.
(1) Add 1-2 drops of
iodine solution to the fluid, the
appearance of a deep blue colour is expected.
(11)Add a few drops of
Fehling's A and B
solutions to the test
solution and boil, a brick red
precipitation is expected..
Glucose would paas out of the tubing. It is because the concentra tion of glucose in the concentrated salt solution e
still
zero. Glucose nolecules pass out by diffusion. W
e) The. distilled water
thie blood.
15. a)
represents
i). The rhythmic pumping.
action of the heart keeps the blood in the circuit to flow” constantly.
(ii)The blood in the
̇substances Co-paan:
through the thin
capillary and Bowman's
capsule walls into
the cavity of the capsule.
b) (1)
(1) Glomerular filtrate.
(111) Urea is formed in
(d)
the liver by the deamination of excess amino acids.
(i) Glucose, amino acida and fatty acids. (ii)They have been
reaborbed by the wall, of the urinferous tubule into the
surrounding. blood
capillaries.
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circuit can flow forward because
i, the pumping action
of heart seta-up. blood pressure which forces the blood to flow forward and
1. there are valves in the heart and veins to prevent the blackflow of
Right ventricle. (ii) The lung. (iii) It is because the wall of chamber Y has to pump blood to distance organs from the heart.
(1) X: deoxygenated
blood.
Y: oxygenated ilood (4) A rich in nutrients
Brich in
(ii)C: oxygenated blood,
rich in urea.
b: deoxygeanted
blood, with
little area
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Hepatic portal vein. It transports the digested:products ' from the intestine to the liver,
(ii)They are vessels. with
copillaries at both ends.
e) Adrenaline and
thyroxine.
物
理
(廿五)
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盧雄國 提供資料
PHYSICS (25)
H.K. 10
MILL & DALE PRESS LTD.
· Revision Test
Time allowed; One hour.
and 30 win.
Answer SIX questions choosing at least ONE from each section. Each question carries equa) · marks. ALL. answers to problems should be given in S.I. units.
SECTION A: MECHANICS AND PROPERTIES OF MATTER
(When necessary, Lake the acceleration due to
gravity 10" mé
Figure 1
Figure
In figure 1, twu me tal spheres A and B are suspended from X and Y respectively by two strings of equal. length..The strings. are long, inextensible. and of negligible
maas. A and I have the same radius r and the seperation of X and Y
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iser.The
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X.Y
of the
and the centres spheres are in the same:vertical plane. The mess of A is 2kg and it is pulled aside so that it is 0.45m above its lowest position. The mass of Bis 1kg and it is pulled aside so that it is 1.25m above its lowest position,
The spheres are.... then released at the same time, the spheres collide with each
other and the maximum height, reached by B after collision is 0.8m (see figure 2). (a)Explain briefly why. the spheres will collide at their lowest positions.
(B) (1)
that are the velocities of the
spheres just before collision.
(ii) What are the
velocities of the spheres just after. collision? 2 → (ii) Pind the maximum
height reached by after collision.
(v)
If when A collides head-on with B, the two spheres remain in.contact.for U.2 seconds, find the average force on A during the collision,
Find the energy lost during the
collision. In what form will the lost energy dissipated?
2. A uniform planck AB 6f length 12m and mass 50kg 25ml話
on two supports P and Qat positions 3m, and 9 from one end A. A man of. mess 75kg stands on the planck 1 metre from (} a1d Am Inc. B as shown in figure
Figure 3
(a)Find the
reactions
at andą,
(b)If the man walkm
*沙井地台
towards B, find, how
個四学大
far
near from
Bacan
be reached, before the plack tilts.
(a)What factors will
affect the efficiency of a single string pulley system? State
the briefly how efficiency is affected by each of these
(b)A block and tackle.
consisting of three fixed and two mayablë pulleys is used to raise an aluminium cube which is completely immersed in water (density TUOOKgmyoushowa in figure 4. It the
volume of the cube
is 10m3, the effort applied to machine
is 5x10 N and the efficiency of the machine is 80% (relative density aluminium-2.5)
Aluminium
cube croce
Effort
Figure 4
water density
(1) What is the velocity
ratio of the system? | (ii) What is the upthrust of water on the aluminium cube. (iii)Neglecting the
resistance of water, find the accelera- tion of the cube while it is moving. in Water.
(iv) Find, approximately, the position at
(x)
which the cube will finally:stay...
What additional effort is required.
to apply to the
system in order to
push the whole cube
out of water?
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