Biology - 0610 CIE

Sense Organs

Gbogbo ọrọ náà

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.

Ebumnobi

  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

Nkuzi Olu

Gee ntị na nkuzi a na ngwa

Maapụ uche

E seela isiokwu a ka ị hụ otu echiche si ejikọta.

Mepee maapụ uche na ngwa

Kaadị ncheta

Omume ncheta ngwa ngwa n'ihe a na-anwale n'isiokwu a.

Mee omume kaadị ndị a na ngwa

Akwụkwọ Ọmụmụ

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.

Ndetu Nkuzi Zuru Ezu di na Ngwa Green Bridge

Nweta ngwa Green Bridge CBT na ekwenti gi ma o bu kompiuta maka ulo akwukwo IGCSE zuru oke: akwukwo ule ndi gara aga, usoro nyocha, eserese uche, kaadi omumu na nkuzi olu.

Akwụkwọ ndụmọdụ zuru oke nwere eserese
Onye inyeaka mmụta AI
Ule nnwale nwere oge a na-ahazi ozugbo i mechara
Budata ngwa ekwentị Budata ngwa kọmputa
Ọ dị na Android, Windows, macOS, na Linux Ngwa iOS na-abia n'oge na-adighi anya

Nnyocha Ọmụmụ

Ekele diri gi maka imecha ihe karịrị na Sense Organs. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.

Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.

Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.

  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

Rue ajuju ndi a n'ime ngwa ahu

Rue ajuju ndi a n'ime ngwa ahu

Akwụkwọ A Na-atụ Aro

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

Mụtakwuo ihe site na isi mmalite mepere emepe

Ndị otu ndị ọzọ bipụtara ha n'okpuru ikike mepere emepe, anyị na-ekele ha dị ka ha si chọọ. Njikọ na-emepe saịtị ha.

Meecha Ajụjụ Ule Ọmarịcha

Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Sense Organs? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.

Budata Ngwa Ahụ Na Google Playstore

Ihe nile ichoro iji nwee ihe ịga nke ọma na JAMB, WAEC & NECO.

Green Bridge CBT Mobile App
Onye Enyemaka Nkata AI Nke Ọmụmụ Ihe Ahaziri Maka Gị
Ajụjụ ule IGCSE, JAMB, WAEC na NECO karịrị 200,000
Ihe karịrị 1200 Nkọwa Nkuzi
Nkwado Na-enweghị Ịntanetị - Mụọ Ihe Mgbe Ọ Bụla, Ebe Ọ Bụla
Jadawalin Gada Kore
Akọkọ akọle iwe & Ibeere agbara
Sọfụma Ọrụ Gi & Ọganihu Gi
Nkọwa Miri Emi Maka Ọmụmụ Ihe Zuru Ezu