Brain and eye 0.0 / 5 ? BiologyCoordination and responseGCSEEdexcel Created by: sharonn.0Created on: 18-04-22 15:02 what does the CNS consist of brain and spinal cord 1 of 24 function of the cerebral cortex outer layer of the brain intelligence, memory and consciousness 2 of 24 function of cerebellum balance and muscle coordination 3 of 24 function of medulla oblangata controls unconscious activities such as heart rate and breathing rate 4 of 24 how to use CT scan - produce 3D images of the brain using X rays - produces physical structures of the brain 5 of 24 how to use PET scan - use radioactive tracers which collect in areas where there is an increased blood flow 6 of 24 why is studying the brain difficult - the brain is complex - hard to access the brain - can cause a lot of problems 7 of 24 what is an axon insulated by a fatty myelin sheath with small uninsulated sections along its length 8 of 24 pathway of nervous system stimulus → sensory neurone → relay neurone → motor neurone → effector → response 9 of 24 what is an effector muscle or gland 10 of 24 what is the function of the cornea transparent and refracts light 11 of 24 what is the function of iris controls how much light enter the pupil 12 of 24 what is the function of lens refracts liight 13 of 24 what is the function of the retina contain light receptor cells 14 of 24 what is the function of the optic nerve sensory neurone that carries impulses between the eye and brain 15 of 24 what is the function of pupil hole that allow light to enter the eye 16 of 24 what happens when objects are close up - ciliary muscles contract - suspensory ligament loosen - light is refracted more 17 of 24 what happens when objects are far away - ciliary muscles loosen - supsensory ligament tight - light is refracted less 18 of 24 what happen to pupil in dim light pupil dilates - widens 19 of 24 what happen to pupil in bright light pupil constricts - narrows 20 of 24 what is short sightedness (myopia) - eyeball is too long - distance objects appear blurry 21 of 24 what is long sightedness (hyperoia) - eyeball is too short - close objects appear blurry 22 of 24 how to treat short sightedness concave lens 23 of 24 how to treat long sightedness convex lens 24 of 24
Comments
No comments have yet been made