In Biology we are studying the eye. Male gave us some activities to do.
1. Structure of the eye.
2. Functions of the eye structures.
4. Animation showing how the eye works.
5. Booklet page 9 exercise 2: The cornea bends or refracts the light rays for the lens to bend and focus them on the fovea (if there is a bright light, on cones) or throughout the retina (if there is dim light, on rods).
6. VIDEO explaining the pupil reflex.
-stimulus: a bright light. >> receptor: cones >> coordinator: brain >> effector: radial and circular muscles >> effect: circular muscles contract while radium relax >> response: the pupil constricts.
-stimulus: a dim light. >> receptor: rods >> coordinator: brain >> effector: radial and circular muscles >> effect: circular muscles relax while radium contract >> response: the pupil gets dilated.
CIRCULAR MUSCLE vs RADIUM MUSCLE: Antagonistic muscles
7. : In the dark room light is focused all over the retina, where the rodes are. Rodes are stimulated the, but rodes are of black and white vision only. So you see only shapes, not colors.
8. Animations to learn how the eye focuses on a nearby and a distant object.
9. If a close object is focused, the light rays coming will be diverging so they will need a lot of bending. The ciliary muscles contract, the suspensory ligaments go slack and the lens becomes shorter and fatter.