Biology (9-1) - 0970 CIE

Sense Organs

Muhtasari

Your eyes are remarkable light detectors. They bend incoming light, focus it onto a screen of light-sensitive cells, and adjust automatically to bright sunshine or a dim room, all without you noticing. The eye is the best-known example of a sense organ.

In this lesson you will learn what a sense organ is, name the parts of the eye and their jobs, and explain the pupil reflex. For the extended curriculum you will also master accommodation (how the lens changes shape to focus) and the roles of rods and cones in the retina.

Malengo

  1. Describe sense organs as groups of receptor cells responding to specific stimuli: light, sound, touch, temperature and chemicals
  2. Identify in diagrams and images the structures of the eye, limited to: cornea, iris, pupil, lens, retina, optic nerve and blind spot
  3. Describe the function of each part of the eye, limited to: (a) cornea - refracts light (b) iris - controls how much light enters the pupil (c) lens - focuses light on to the retina (d) retina - contains light receptors, some sensitive to light of different colours (e) optic nerve - carries impulses to the brain
  4. Explain the pupil reflex, limited to changes in light intensity and pupil diameter
  5. [Supplement] Explain the pupil reflex in terms of the antagonistic action of circular and radial muscles in the iris
  6. [Supplement] Explain accommodation to view near and distant objects in terms of the contraction and relaxation of the ciliary muscles, tension in the suspensory ligaments, shape of the lens and refraction of light
  7. [Supplement] Describe the distribution of rods and cones in the retina of a human
  8. [Supplement] Outline the function of rods and cones, limited to: (a) greater sensitivity of rods for night vision (b) three different kinds of cones, absorbing light of different colours, for colour vision
  9. [Supplement] Identify in diagrams and images the position of the fovea and state its function

Somo la Sauti

Sikiliza somo hili kwenye programu

Ramani ya mawazo

Mada hii imechorwa ili uone jinsi mawazo yanavyounganika.

Fungua ramani ya mawazo kwenye programu

Kadi za kumbukumbu

Mazoezi ya haraka ya kumbukumbu kuhusu kinachopimwa katika mada hii.

Fanya mazoezi ya kadi hizi kwenye programu

Maelezo ya Somo

Sense organs let an organism detect changes in its surroundings so the nervous system can coordinate a response. The eye shows beautifully how structure fits function, and examiners regularly ask you to label it, explain the pupil reflex, and (at Extended) describe accommodation.

Dokezo Kamili la Somo Linapatikana kwenye Programu ya Green Bridge

Pata programu ya Green Bridge CBT kwenye simu au kompyuta yako kwa maktaba kamili ya IGCSE: mitihani ya miaka iliyopita, miongozo ya usahihishaji, ramani za mawazo, kadi za marudio na masomo ya sauti.

Maelezo kamili ya masomo yenye michoro
Msaidizi wa kujifunza wa AI
Mitihani ya majaribio yenye muda, husahihishwa mara umalizapo
Pakua programu ya simu Pakua programu ya kompyuta
Inapatikana kwa Android, Windows, macOS, na Linux Programu ya iOS inakuja hivi karibuni

Tathmini ya Somo

Hongera kwa kukamilisha somo la Sense Organs. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.

Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.

Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.

  1. Which part of the eye refracts light as it enters? A. retina B. cornea C. optic nerve D. blind spot Answer: B
  2. The part of the eye that controls how much light enters the pupil is the: A. lens B. retina C. iris D. cornea Answer: C
  3. In bright light the pupil: A. gets larger B. gets smaller C. stays the same D. disappears Answer: B
  4. To focus on a near object the lens becomes: A. thinner B. fatter C. flatter D. it does not change Answer: B
  5. Cones in the retina are mainly responsible for: A. night vision B. colour vision C. detecting sound D. controlling the pupil Answer: B

Fanyia kazi maswali haya kwenye programu

Fanyia kazi maswali haya kwenye programu

Vitabu Vinavyopendekezwa

Cambridge IGCSE Biology Coursebook
Cambridge IGCSE Biology Coursebook
Manukuu: Fifth edition
Mchapishaji: Cambridge University Press
Mwaka: 2021
ISBN: 978-1-108-74880-2
Maelezo: Endorsed coursebook with full coverage of the 0610/0970 syllabus, practical investigations and exam-style questions.
Cambridge IGCSE Biology
Cambridge IGCSE Biology
Manukuu: Fourth edition
Mchapishaji: Hodder Education
Mwaka: 2021
ISBN: 978-1-5104-7864-0
Maelezo: Endorsed textbook covering the Core and Supplement content with clear biological diagrams and questions.

Jifunze zaidi kutoka vyanzo huria

Vimechapishwa na mashirika mengine chini ya leseni huria na vinatajwa kama wanavyoomba. Viungo hufungua tovuti zao.

Fanya Mazoezi ya Maswali ya Majaribio

Ungependa kufanya mazoezi ya maswali ya majaribio kuhusu Sense Organs? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.

Pakua Programu Kwenye Google Playstore

Kila kitu unachohitaji ili kufaulu katika JAMB, WAEC & NECO.

Green Bridge CBT Mobile App
Msaidizi wa Gumzo wa Kujifunza wa AI Uliobinafsishwa
Maswali ya mtihani zaidi ya 200,000 ya IGCSE, JAMB, WAEC na NECO
Zaidi ya Madaftari ya Masomo 1200
Msaada Nje ya Mtandao - Jifunze Wakati Wowote, Popote Pale
Ratiba ya Daraja la Kijani
Muhtasari wa Fasihi na Maswali Yanayoweza Kutokea
Fuata Utendaji na Maendeleo Yako
Maelezo ya Kina kwa Kujifunza kwa Kina