www.XtremePapers.com UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level 5096/02

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5096/02
HUMAN AND SOCIAL BIOLOGY
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS
General Certificate of Education Ordinary Level
October/November 2009
2 hours
Candidates answer on the Question Paper.
No Additional Materials are required.
READ THESE INSTRUCTIONS FIRST
Write your Centre number, candidate number and name on all the work you hand in.
Write in dark blue or black pen.
You may use a pencil for any diagrams, graphs or rough working.
Do not use staples, paper clips, highlighters, glue or correction fluid.
DO NOT WRITE IN ANY BARCODES.
For Examiner’s Use
Section A
Answer all questions.
Write your answers in the spaces provided on the Question Paper.
You are advised to spend no longer than 1 hour on Section A.
Section B
Answer all the questions, including questions 8, 9 and 10 Either or 10 Or.
Write your answers in the spaces provided on the Question Paper.
Write an E (for Either) or an O (for Or) next to the number 10 in the
Examiner’s grid to indicate which question you have answered.
1
2
3
4
5
The number of marks is given in brackets [ ] at the end of each question
or part question.
6
7
Section A
sub-total
8
9
10
Total
This document consists of 19 printed pages and 1 blank page.
DC (SHW/CGW 00293 6/08) 12921/5
© UCLES 2009
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Section A
For
Examiner’s
Use
Answer all the questions.
Write your answers in the spaces provided.
1
Fig. 1.1 shows a view of the heart from the front.
C
D
H
B
E
G
I
A
F
Fig. 1.1
(a) Using only the letters A to F, list which of the blood vessels on Fig. 1.1
(i)
carry deoxygenated blood, .............................................
[3]
(ii)
carry oxygenated blood. .................................................
[3]
(b) Name the heart chambers indicated by the letters G, H and I on Fig. 1.1.
G ......................................................................................................................................
H ......................................................................................................................................
I .................................................................................................................................. [3]
(c) State in which of the vessels A to F a blockage commonly leads to heart failure.
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Blood leaves the heart under high pressure through arteries and re-enters it through veins,
under low pressure.
For
Examiner’s
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(d) List three ways in which the structure of arteries is adapted to withstand high
pressure.
1. ......................................................................................................................................
2. ......................................................................................................................................
3. ................................................................................................................................ [3]
(e) When a doctor takes your blood pressure, two readings are given, for example, 120 over
80 millimetres of mercury. Explain what the two figures represent in this example.
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Table 1.2 shows the percentage blood flow to different tissues and organs when the body is
at rest and then during heavy exercise.
Table 1.2
organs
blood flow during exercise / %
heart
4
4
skin
9
2
brain
13
3
kidneys
19
1
gut
24
1
muscles
22
88
9
1
100
100
other organs
total
(f)
blood flow at rest / %
Using the information in Table 1.2,
(i)
state which two organs show the greatest reduction in percentage blood flow during
exercise,
1. ................................................................
2. ................................................................
(ii)
[2]
calculate by how many times blood flow to the muscles increases during exercise.
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(g) Describe how muscular activity helps in returning blood to the heart from the extremities
of the body.
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[Total: 20]
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5
2
Fig. 2.1 shows an experiment to demonstrate the digestion of starch to sugar by an enzyme
in saliva.
R
For
Examiner’s
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S
Visking tubing
Visking tubing
10 cm3 1%
starch
solution
10 cm3 1%
starch
solution
+
1 cm3 saliva
water
Fig. 2.1
Visking tubing resembles the gut wall in that it is permeable to small molecules but not to
large ones. Tests for starch and sugar were carried out on samples of the fluid taken from
inside the Visking tubing and the water outside, at the start of the experiment and after
20 minutes. Some of these results are shown in Table 2.1 below.
(a) Complete Table 2.1 by using the words present or absent.
[4]
Table 2.1
© UCLES 2009
result at start
result after 20 minutes
liquid
tested
starch
sugar
starch
sugar
fluid in R
present
absent
present
absent
water in R
absent
absent
absent
absent
fluid in S
present
absent
water in S
absent
absent
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(b) Describe how you would carry out the test for sugar on a sample of liquid, and the result
you would see if sugar was present.
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[Total: 8]
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7
3
Fig. 3.1 shows a section through the skin under two different conditions, P and Q. In P the
body is at rest; in Q the body is exercising hard.
P
For
Examiner’s
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Q
capillary
sweat
gland
Fig. 3.1
(a) State two ways in which the skin shown in Q differs from P.
1. ......................................................................................................................................
2. ................................................................................................................................ [2]
(b) Explain how each of the differences you stated in (a) will increase heat loss from the
skin.
1. ......................................................................................................................................
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2. ......................................................................................................................................
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[Total: 6]
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4
Fig. 4.1 shows the bones and related tissues of the elbow joint.
For
Examiner’s
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Fig. 4.1
(a) Label an example of each of the following tissues on Fig. 4.1.
(i)
cartilage
(ii)
ligament
(iii)
tendon
(iv)
muscle
[4]
(b) State two advantages of bone being a living tissue.
1. ......................................................................................................................................
2. ................................................................................................................................ [2]
[Total: 6]
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5
Fig. 5.1 shows a vertical section through the female reproductive organs.
For
Examiner’s
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Fig. 5.1
Using label lines and the letters J to N show the following on Fig. 5.1:
J –
K–
L –
M–
N–
where meiosis occurs
a ciliated region
urethra
where implantation occurs
where oestrogen is formed
[5]
[Total: 5]
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6
Read the following paragraph and choose from the terms given below to fill in the blanks left
in the passage.
active
passive
antibodies
phagocytes
antigens
plasma
long
serum
lymphocytes
short
Poisonous snakes can be farmed for their venom. This is collected and a diluted sample
is injected into a large animal such as a horse. The horse’s ………………………………
make ……………………………… to the toxin in the venom. Later, larger doses of venom are
injected into the horse which responds by forming large numbers of these protective proteins.
Blood can be taken from the horse and its corpuscles removed. The resulting liquid,
rich in proteins, is called a ……………………………… . If a person is bitten by the same
species of snake, the horse-extract can be used to treat that person. This protection is
a type of ……………………………… immunity. The protection given is immediate, but is of
……………………………… duration.
[5]
[Total: 5]
© UCLES 2009
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11
7
Fig. 7.1 shows the distribution of rods and cones across the retina of the eye from one side
to the other.
For
Examiner’s
Use
rods
number
of cells
cones
0
X
fovea
edge of
retina
edge of
retina
Fig. 7.1
(a) In which part of the retina are
(i)
the most rods found, .......................................................
(ii)
the most cones found? ...................................................
[2]
(b) Identify region X on Fig. 7.1. .................................
[1]
(c) State which region of the eye contracts
(i)
to reduce the amount of light entering the eye, .................................................
(ii)
to focus on a near object. ..................................................
[2]
[Total: 5]
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Section B
Answer all the questions, including questions 8, 9 and 10 Either or 10 Or.
Write your answers in the spaces provided.
8
(a) State the uses of water in the body.
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(b) Describe the actions of the different parts of the kidney tubule in taking water from the
blood and passing it into the urine.
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(c) Describe how the brain and kidney interact when there is a shortage of water in the
blood.
For
Examiner’s
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[Total: 15]
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9
Fig. 9.1 shows a set of living conditions in a poor rural village.
latrine
people crowded
in poorly ventilated
rooms
manure heap
For
Examiner’s
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long grass
stagnant
pond water
shallow open well
wet muddy ground
Fig. 9.1
Describe the possible hazards to health for the people living in this village.
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Examiner’s
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10 Either
(a) State which two organs of the body are affected by long-term excessive alcohol intake.
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(b) Explain why it is very unwise to drive a car after drinking alcohol.
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(c) Alcohol is said to be addictive. Explain what this means.
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Examiner’s
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Fig. 10.1 shows simple apparatus which an experimenter could use to measure the speed of
a subject’s reactions.
experimenter
drops ruler
subject catches
ruler
Fig. 10.1
(d) Describe how this apparatus could be used to measure the effect of drinking alcohol on
the subject.
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[Total: 15]
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10 Or
(a) State two possible effects on the body of smoking cigarettes for a long time.
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(b) Explain why a woman who smokes when she is pregnant is likely to have smaller than
average babies.
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(c) What is meant by the term vital capacity ?
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Fig. 10.2 shows some apparatus.
water-filled
jar
tube
trough
Fig. 10.2
(d) Describe how you would use this apparatus to measure the effect of prolonged smoking
on vital capacity.
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[Total: 15]
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Examiner’s
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BLANK PAGE
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reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the
publisher will be pleased to make amends at the earliest possible opportunity.
University of Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of
Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge.
5096/02/O/N/09
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