SCIENCE FORM 3 CHAPTER 1

Front

Which of the following represent central nervous system? Options: J- Otak (brain), K- Saraf spina (spinal nerves), L- saraf tunjang (spinal cord), M- saraf cranium (cranial nerves)

Back

J dan L (J and L)

Front

Gambar rajah 1 menunjukkan laluan impuls setelah rangsangan diterima oleh kulit. The diagram 1 shows the path of an impulse after a stimulus is received by the skin.
Antara berikut yang manakah mewakili X, Y dan Z? Which of the following represents X, Y and Z? X - Otak/Brain, Y - Efektor/Effector, Z - Reseptor/Receptor, X - Reseptor/Receptor, Y - Efektor/Effector, Z - Otak/Brain, X - Otak/Brain, Y - Reseptor/Receptor, Z - Efektor/Effector, X - Reseptor/Receptor, Y - Otak/Brain , Z - Efektor/Effector

Back

X - Reseptor/Receptor, Y - Otak/Brain , Z - Efektor/Effector

Front

Antara berikut, yang manakah merupakan tindakan terkawal? Which of the following is a voluntary action?

• Peristalsis
• Peristalsis
• Bercakap
• Talking
• Berpeluh
• Sweating
• Denyutan jantung
• Heart beat

Back

Bercakap Talking

Front

Rajah 2 menunjukkan keratan rentas kulit manusia. Diagram 2 below shows a cross-section of human skin. Pasangan stimuli manakah yang bergerak balas terhadap reseptor P dan Q? Which pair of stimuli do receptors P and Q respond to? Options: P - Sakit/Pain, Q - Tekanan/Pressure; P - Sentuhan/Touch, Q - Sejuk/Cold; P - Sejuk/Cold Q - Sakit/Pain; P - Tekanan/Pressure, Q - Sentuhan/Touch

Back

P - Sakit/Pain, Q - Tekanan/Pressure

Front

Which action will pass through the impulse pathway: Receptor --> Spinal cord --> Effector? Options: Breathing, Thinking, Knee-jerk reaction, Walking.

Back

Knee-jerk reaction

Front

Antara hubungan organ deria dengan rangsangan di bawah, yang manakah tidak benar? Which pair of the sensory organ with stimulus below, is not true?

• Mata/Eyes - Cahaya/Light
• Hidung/Nose - Udara/Air
• Lidah/Tongue - Bahan kimia/Chemical substances
• Telinga/Ear - Bunyi/Sound

Back

Hidung/Nose - Udara/Air

Front

Kepekaan kulit terhadap rangsangan dipengaruhi oleh The sensitivity of skin to the stimulus is effected by

• Ketebalan lapisan lemak (Thickness of fat layer)
• Ketebalan dermis (Thickness of dermis)
• Jenis rangsangan (Type of stimulus)
• Bilangan reseptor (Number of receptors)

Back

Bilangan reseptor Number of receptors

Front

Which of the following is not correct about nose?

• Sensory cells are located under the nose
• The nose is a sensory organ for a sense of smell
• The amount of fluid increases when a person suffers from flu
• Sensitive cells in the nose are very sensitive to chemicals

Back

Sensory cells are located under the nose

Front

Which of the parts labelled A, B, C and D, is a sensory cell? Options: A, B, C, D

Back

B

Front

Semasa seseorang itu menghidapi selesema, makanannya tidak akan berasa sedap. Hal ini demikian kerana When a person suffers from flu, the food will not be delicious. This is so because

• Hidung dan lidah tidak lagi berfungsiNose and tongue are no longer work
• Bakteria di dalam mulut melemahkan kebolehan sel –sel reseptor mengesan rasa makananBacteria in the mouth weaken the ability of the cell-receptor to detect the taste of the food
• Kuantiti mukus yang banyak di bukaan hidung menghindarkan bahan kimia daripada merangsang sel-sel reseptor bauThe abundance of mucous quantities in the nasal opening prevents chemicals from stimulating the receptor cells of the smell
• Sel-sel peka bau telah diserang virus selesema dan tidak dapat berfungsiSensitive cells have been attacked by flu virus and cannot function

Back

Kuantiti mukus yang banyak di bukaan hidung menghindarkan bahan kimia daripada merangsang sel-sel reseptor bau The abundance of mucous quantities in the nasal opening prevents chemicals from stimulating the receptor cells of the smell