SMJK CHONG HWA KUALA LUMPURUJIAN SERENTAK 2015

SAINSTINGKATAN 4

Nama : ________________________________ Tarikh : 4 Mac 2015Tingkatan : 4 ______ Masa : 1 Jam 30 Minit

Section A: Answer all of the questions. (20 Marks)

1. What is meant by body coordination?

A. To coordinate body’s growthB. To coordinate position and balance of the bodyC. To coordinate body’s responses towards any stimuliD. To coordinate secretion of hormone by endocrine gland

2. Which of the following is the component of central nervous system?

A. Brain C. Spinal nerveB. Cranium D. Cranial nerve

3. Diagram 1 represents a neurone.

Diagram 1

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Dendrites

Cell body

Axon

What is the function of the neurone shown?

A. It transmits impulse to an effectorB. It receives impulse from an effectorC. It transfers impulse from sensory neurone to a motor neuroneD. It transmits impulse from motor neurone to a sensory neurone

4. Diagram 2 shows the structure of a neurone.

Diagram 2

Which part A, B, C and D is the dendrite?

5. Nervous coordination requires receptors and effectors. What are the functions of the receptor and effector?

Receptor EffectorA. Send impulses Detect changesB. Detect changes Send impulsesC. Detect changes Respond to changesD. Found in the skin Found in the brain

6. Diagram 3 shows the flow of impulses in a reflex arc for a reflex action.

Diagram 3

What are P, Q and R?

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Receptor P Q R Effectorimpulse

A

B

C

D

P Q RA. Relay neurone Sensory neurone Motor neuroneB. Sensory neurone Motor neurone Relay neuroneC. Motor neurone Relay neurone Sensory neuroneD. Sensory neurone Relay neurone Motor neurone

7. Diagram 4 shows the impulse pathway in nervous coordination.

Diagram 4

Which of the following represents R?A. Eyes C. GlandsB. Brain D. Muscle

8. What is the function of stretch receptor?A. To detect pain C. To maintain body postureB. To detect pressure D. To maintain body temperature

9. Where are proprioceptors found?

A. Muscles, tendons and ligamentB. Ears, throat and oesophagusC. Tongue, teeth and gumD. Eyes, nose and mouth

10. Diagram 5 shows part of the human central nervous system.

Diagram 5

Which part A, B, C and D controls the heart beat?

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Stimuli impulse Receptor R Effector Response

A

B

C

D

11. Which activity is an involuntary action?A. Dancing C. WalkingB. Knee jerk D. Thinking

12. Diabetes mellitus is a condition caused by the undersecretion of a certain hormone. Which of the

following pairs names the hormone and the relevant endocrine gland correctly?

Hormone Endocrine glandA. Adrenaline Adrenal glandB. Insulin Pancreas C. Thyroxine Thyroid glandD. Oestrogen Ovary

13. Which of the following pairs of nervous coordination and hormone coordination is correctly matched?

Nervous coordination Hormonal coordinationA. Long-term effect Short-term effectB. Slow response Immediate responseC. Consist of nerves Consist of ductless glandsD. Widespread target area Limited target area

14. Which group of drugs is used to relieve pain?

A. Hallucinogen C. Stimulant B. Depressant D. Opiate

15. Excessive consumption of alcohol can cause

I Loss of muscular coordination III Cirrhosis of the liverII Quick response to stimulus IV Hallucination

A. I and II C. I and IVB. I and III D. III and IV

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16. Diagram 6 shows a process called crossing-over.

Crossing over causes

A. Mutation C. ReproductionB. Growth D. Variation

17. Which of the following statements is correct about meiosis?

A. Involved in growthB. Involves all types of cellsC. Halves the number of chromosomesD. Genetic contents of daughter cells and parent cells are similar

18. Which of the following shows a dominant trait?

A. Blue eyes C. Attached earlobeB. Curly hair D. Unable to roll the tongue

19. Diagram 7 shows the inheritance of the colour of the flower.

Parents :

Gametes :

Offspring :

Diagram 7

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PurpleYy

Whiteyy

Y y y y

Yy Yy yy yy

Diagram 6

What is the phenotypic ratio in the first generation?

Purple WhiteA. 1 1B. 1 2C. 1 3D. 3 1

20. Diagram 8 shows a monohybrid cross between two rats having different fur colour.

Parents Phenotype :Parental Genotype :Gametes :

Offspring :

Diagram 8

What is the parental genotype?

Male FemaleA. BB BbB. Bb BbC. Bb bbD. bb bb

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MaleBlack fur

FemaleWhite fur

B b b b

Bb Bb bb bb

x

Section B: Answer all of the questions. (30 Marks)

1. Diagram 9 shows an experiment to study the relationship between the number of loads on a spring and the lengthening of the spring.

Diagram 9

This experiment is repeated by using different number of loads. The results of the experiment are recorded in Table 1.

Number of load Lengthening of the spring (cm)

Table 1

(a) Complete Table 1. (3 marks)

(b) Based on Diagram 9, state the following variables:(i) Manipulated variable: (1 mark)

__________________________________________________________________________

(ii) Responding variable : (1 mark)

__________________________________________________________________________7

8 cm

14 cm11 cm17 cm

2. A student conducted an experiment to study the growth of a corn seedling. The height of the corn seedling is measured for every two days. The result of the experiment is shown in Table 2

Time/day

Height of corn

seedling/cm0 02 64 206 308 35

Table 2

(a) Based on Table 3, the height of the seedling increases the most from day_________ to day ________[1 mark]

(b) Using the data in Table 3, draw a graph of the height of the seedling against time on the graph paper below.

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[2 marks]

(c) What is the relationship between the height of the seedling and time?

____________________________________________________________________________________

[1 mark]

(d) Predict the height of the seedling on the 10th day.

____________________________________________________________________________________[1 mark]

3. Diagram 10.1 shows the structure of a neurone.

Diagram 10.1

(a) Based on Diagram 10.1, mark (√) for the type of neurone in the box provided. (1 mark)

Sensory neurone Relay neurone Motor neurone

(b) Based on Diagram 10.1, identify the following part:(2 marks)

P : ________________________________________________

Q: ________________________________________________

(c) State the function of P. (1 mark)________________________________________________________________________________

(d) Diagram 10.2 shows the pathway of an impulse.

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Receptor Central nervous system Effector

PQ

R

Diagram 10.2

Mark (√) for the location of this type of neurons in Diagram 10.2 (1 mark)4. Diagram 11 shows the structure of a human brain.

Diagram 11

(a) Name the part labeled as X and Y. (2 marks)(i) X : _____________________________________

(ii) Y : _____________________________________

(b) What is the advantage of the highly folded surface of X? (1 mark)

________________________________________________________________________________

(c) What is the function of the part labeled as Y? (1 mark)

________________________________________________________________________________

(d) What will happen if part Y is injured? (1 mark)

________________________________________________________________________________

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X

Y

5. Diagram 12 shows the location of the main endocrine glands in the human body.

Diagram 12(a) (i) State the label and name the endocrine gland in Diagram 12 that is known as the ‘master gland’ of the

endocrine system. (2 marks)

________________________________________________________________________________

(ii) State the reason why is it known as the ‘master gland’? (2 marks)

________________________________________________________________________________

(b) Name a hormone secreted by N. (1 mark)

________________________________________________________________________________

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6. Diagram 13 shows the phases of a cell division.

Diagram 13

(a) (i) Name this type of cell division. (1 mark)

________________________________________________________________________________

(ii)Give one reason for your answer in 5(a)(i). (1 mark)

______________________________________________________________________________

(b) What process occurs during stage Q? (1 mark)

________________________________________________________________________________

(c) Name two organs of the body where this cell division occurs. (2 marks)

________________________________________________________________________________

~~ END OF QUESTION PAPER ~~

Disediakan oleh: Disemak oleh: Disahkan oleh:

(NURUL AINI BINTI MD DESA) (CHIN HUEY WEN) (LOW SIOW NGO)

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Guru Sains Ketua Bidang Sains dan Matematik

Penolong Kanan Tadbiran Dan Kurikulum

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