Cape Biology 2014 u2 p1

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TEST CODE

FORM TP2014143

02207010

MA YIJUNE 2014

CARIBBEAN

EXAMINATIONS

COUNCIL

CARIBBEAN ADVANCED PROFICIENCY

EXAMINATION@

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60

When a decrease in normal blood glucose concentration is detected, Hormone X is secreted. What is Hormone Xand precisely where is it produced?

40

Hormone

~ ~

Il-I

X

20

o

20

40

60

80

100

Partial pressure of oxygen (mm Hg)

24.

Location Produced

(A)

Insulin

a cells in pancreas

(B)

Insulin

P cells

(C)

Glucagon

a cells in pancreas

(D)

Glucagon

~ cells in pancreas

in pancreas

From the graph, it can be deduced that (A)

(B)

(C)

(D)

at high partial pressures of carbon dioxide, the rate of release of oxygen from haemoglobin increases at low partial pressures of carbon dioxide, the rate of release of oxygen from haemoglobin increases at low partial pressures of oxygen, the rate of release of oxygen from haemoglobin decreases at high partial pressures of oxygen, the rate of release of oxygen from haemoglobin increases

GO ON TO THE NEXT PAGE 022070 IO/CAPE 2014

-9 Item 27 refers to the following diagram of the glomerulus and Bowman's capsule of a nephron.

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27.

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If the diameter of the blood vessel is made smaller at X, a possible outcome is that (A) (B)

the rate of ultrafiltration will be increased the rate of ultrafiltration will be decreased

(C)

water re-sbaorption will be decreased the rate of urine production will be reduced

(D)

!.tew 29. refers to the following photcm lcrograph of 11 human blood smear showing erythrocytes and leucocytes.

Jtern28 refers to the following graph which shows the sodium ion concentration as 'fluid passes along the kidney tubule. 'tl

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Region of tubule

28.

The region of the descending loop of Henle

29.

The blood cell labelled X is

is (A) (13) (C) (D)

erythrocyte granulocyte a lymphocyte 11 rncnocyte

(A)

all

I II

(8)

fl.

1Il IV

(D)

(C)

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(11-..1'T(I

'TUp 1-..ICV'T

PA nc

Item 30 refers to ,the following diagram which shows a synapse, movement of substances across the neurone membranes,

The numbered arrows represent

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XX"

neurone

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Direction of transmission of action potential 30.

Which of the following correctly identifies the substances moving across the membranes at points 1,2,3 and 4? 1

2

(A),

K+-

Cn2+

",(8) "

K+

Na+ K+ Ca2+

3 Cah

...

(C) Na+

(D) Na+

.

_ ..

.

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---

CaH Acetylcholine Na+

,Acetyloholin,e, Ca2+

Acetylcholine

Item 31 refers to the following table which shows the number of cases of dengue haemcrrhagic fever (per 100 000 inhabitants) reported in the Americas 200 I and 2002.

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for

32.

Which of the following antigens? (A) (8)

2001 5 000 31.

I

2002 lS 000

Which of the following represents the incidence rate for the period 200 1 to 2002? (A) (B) (C) (D)'

(C) (D)

BEST describes

CelI surface proteins that trigger an immune response Proteins in the cytoplasm that trigger an immune response Substances produced by pathogens that trigger an immune response Substances produced by the .body in response to an infection

0.05 0.10 0.15 0.20

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2014

- 11 33.

A highly ultraviolet (A) (B)

(C) (D)

34.

linked

to

38.

sarcoma melanoma lymphoma papilloma

(C) (D)

39.

bone marrow lymph nodes spleen thymus

(A)

Oestrogen

(8) (C)

Progesterone Follicle-stimulating

(D)

Humanchorionic gonadotropin

The monomers that make up the heavy and light chains of an antibody molecule arejoined by (A)

(8) (C) (D)

peptide bonds hydrogen bonds glycosidic bonds disulphide bonds

Which of the following response of the immune invading pathogen? (A) (8) (C) (D)

Cerebral describes

(A)

40.

36.

The presence of a hormone is used as the basis for a pregnancy test. Which of the following hormones is present in the urine of a pregnant woman?

(C)

hypertension

(D)

coronary heart disease

Which of the following benefit of exercise?

(8) (C) (D) is a possible system to an

T-Iymphocytes produce antibodies. B-Iymphocytes produce antigens. T-lymphocytes become activated. B-Iymphocytes phagocytose the pathogen.

Passive artificial immunity is effective but only for a short time. Which ofthe following is the BEST explanation for this? (A) (8) (C) (D)

Antigens are rapidly destroyed. Antibodies are rapidly broken down. Phagocytes have a short life span. Memory cells have a short life span.

MOST

stroke angina

(A)

41.

haemorrhage

(8)

likely

is NOT a health

Enhanced utilization of fat Speeding up of atherosclerosis Improved resistance to infection Reduced risk of coronary heart diseases

One per cent of the human population not susceptible to HIY. This is due to (A) (8) (C)

37.

hormone

T-lymphocytes mature in the (A) (8)

35.

malignant tumour radiation is a

(D)

is

phagocytosis of the v irus by macrophages . the development of .antibo dies against the virus a mutation preventing binding of HIV to T~cells a mutation preventing binding of HIV to B-cells

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~2.

Whichofthe following BEST describes the disease atherosclerosis?

(A) (8) (C)

(D)

43.

Extensive damage to the endothelial lining of the arteries Formation of large blood clots in arteries Build-up of plaque in the walls of arteries Calcification ofthe walls of arteries

The progressive decrease in response to a drug as the human body adapts to its presence is called (A) (B) (C) (D)

44.

Which of the following is likely to be the MOST effective in preventing a person from becoming infected with.the dengue virus? (A)

(8) (C) (D)

45.

Which two stages of alcoholic liver disease are reversible? (A)

craving adaptation tolerance dependence

A poster describing the life cycle of the dengue virus Ensuring that all water storage drums are securely covered Introducing fish into garden ponds Regular personal use of insect repellents

(8) (C)

(D)

Liver becomes swollen and fatty; and liver cirrhosis. Liver becomes swollen and fatty, and inflammation of the liver. Liver cells are replaced by fibrous scar tissue, and inflammation of the liver. Liver cells are replaced by fibrous scar tissue, and liver becomes swollen and fatty.

END OF TEST

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0220701 O/CAPE 2014

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