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RANGSANGAN &
GERAK BALAS
Disediakan oleh :
1. Muhammad Farhan bin Mohd Syahmi
2. Muhammad Hazim Nizam bin Mazlan
3. Muhammad Zulhafiz bin Mohd Aini.
4. Fauz Hamsyari bin Slamet Purwanto
MATA
• Mata ialah salah satu deria yang penting.
• Ia membantu manusia melihat sekeliling.
• Mata terdiri daripada tiga lapisan, iaitu Sklera, Koroid
dan Retina.
FUNGSI DALAM MATA
• Otot silia : Mengubah ketebalan mata melalui pengecutan dan
pengenduran
• Ligamen penggantung: Memegang kanta pada kedudukan
• Iris: Mengawal saiz pupil
• Kanta mata: Memfokuskan cahaya untuk membentuk imej pada
Retina.
• Kornea: Membiaskan & memfokuskan cahaya ke atas retina.
• Pupil: Membenarkan cahaya memasuki mata.
• Konjunktiva: Membran nipis & lut sinar yang melindungi kornea
• Saraf optik: Menghantar impuls ke otak untuk ditafsirkan.
• Bintik kuning: Tempat paling peka dengan cahaya
FUNGSI DALAM MATA
• Gelemair: Membantu memfokus imej pada retina. Mengekalkan
bentuk mata
• Gelemaca: Membantu memfokus imej pada retina . Mengekalkan
bentuk bola mata.
• Titik buta: Bahagian retina yang tidak peka dengan cahaya. Tiada imej
boleh dikesan di kawasan ini.
• Sklera : melindungi mata dan memberi bentuk kepada mata.
• Koroid: Pigmen hitam menyerap cahaya dan menghalang pembiasan.
• Retina: Lapisan yang mengandungi fotoreseptor yang
mengesancahaya dan menghasilkan imej.
WARNA APA YANG DILIHAT OLEH MATA
• Fotoreseptor terbahagi kepada 2 iaitu, sel rod dan sel kon
• Sel Kon: Peka terhadap warna cahaya dalam keadaan cerah.
• Sel Rod: Peka dengan keadaan cahaya yang berbeza
termasuklah cahaya yang samar tetapi tidak peka dengan
cahaya
BAHAGIAN DALAM
MATA
Gelemair
Gelemaca
Rangsangan & gerak balas

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Rangsangan & gerak balas

  • 1. RANGSANGAN & GERAK BALAS Disediakan oleh : 1. Muhammad Farhan bin Mohd Syahmi 2. Muhammad Hazim Nizam bin Mazlan 3. Muhammad Zulhafiz bin Mohd Aini. 4. Fauz Hamsyari bin Slamet Purwanto
  • 2. MATA • Mata ialah salah satu deria yang penting. • Ia membantu manusia melihat sekeliling. • Mata terdiri daripada tiga lapisan, iaitu Sklera, Koroid dan Retina.
  • 3. FUNGSI DALAM MATA • Otot silia : Mengubah ketebalan mata melalui pengecutan dan pengenduran • Ligamen penggantung: Memegang kanta pada kedudukan • Iris: Mengawal saiz pupil • Kanta mata: Memfokuskan cahaya untuk membentuk imej pada Retina. • Kornea: Membiaskan & memfokuskan cahaya ke atas retina. • Pupil: Membenarkan cahaya memasuki mata. • Konjunktiva: Membran nipis & lut sinar yang melindungi kornea • Saraf optik: Menghantar impuls ke otak untuk ditafsirkan. • Bintik kuning: Tempat paling peka dengan cahaya
  • 4. FUNGSI DALAM MATA • Gelemair: Membantu memfokus imej pada retina. Mengekalkan bentuk mata • Gelemaca: Membantu memfokus imej pada retina . Mengekalkan bentuk bola mata. • Titik buta: Bahagian retina yang tidak peka dengan cahaya. Tiada imej boleh dikesan di kawasan ini. • Sklera : melindungi mata dan memberi bentuk kepada mata. • Koroid: Pigmen hitam menyerap cahaya dan menghalang pembiasan. • Retina: Lapisan yang mengandungi fotoreseptor yang mengesancahaya dan menghasilkan imej.
  • 5. WARNA APA YANG DILIHAT OLEH MATA • Fotoreseptor terbahagi kepada 2 iaitu, sel rod dan sel kon • Sel Kon: Peka terhadap warna cahaya dalam keadaan cerah. • Sel Rod: Peka dengan keadaan cahaya yang berbeza termasuklah cahaya yang samar tetapi tidak peka dengan cahaya