![]() ![]() OR for near or distant vision OR for accommodation Label structures:Ĭ B = eardrum / tympanum / tympanum C = round window Make an X on the diagram to indicate the region where fluid pressure waves cause tiny cilia to bend for the sensation of hearing. To focus image onto the yellow spot irrespective of the distance from the eye (ii) F Explain the significance of the elastic nature of the lens. The eye looking at an object moving towards the viewer (i) D The eye looking at a nearby stationary object (How do you know the ciliary muscles are contracted?) Suspensory ligament slackens Which letter on the graph indicates each of the following: (ii) Diagram 1 Explain your answer in QUESTION.3. (ii) under dim light conditions (i) Diagram 2 (i) where the ciliary muscles are contracted A: Ciliary muscle/bodyī: Suspensory ligament Which Diagram (I or II) shows part of the eye. Between which two measurements did the following change in the diameter of thepupil occur: largest decrease? betw 6 and 7 min (no units, no marks) Why did the diameter of the pupil remain the same during the third and the fourth time intervals? Light source was the samedistancefrom the person Identify parts A and B. Which structure in the eye controls the size of the pupil? iris Plot a line graph of the results in the table above. Table showing the diameter of the pupil after increasing time intervals. Provide an appropriate title for this table. The results obtained are shown in the table below. During this period the diameter of the pupil of the eye is measured. A dim electric bulb, positioned at varying distances from the person (not all measurements were at different distances), is switched on at one- minute intervals for a period of 10 seconds. contracts or relaxes to focus the image using the lens Name the condition responsible for the size of structure 1 in the diagram amount of light present Name the condition responsible for the shape of the lens in the diagram distance of object from eye / focus A person in a darkened room is asked to cover one eye. Static balance (gravity) is sensed by theĭ maculae D The part of the ear where a sound wave is changed into a vibration is called theĭ pinna B Which one of the following parts of the body are most involved in helping a blind-folded man standing on one leg to keep his balance?ĭ brain, cochlea, semicircular canals C The shape of the lens in the human eye may be altered by contraction or relaxation of the.ĭ pupil B Identify parts numbered 1 - 3 1 = pupilģ = ciliary body Give the function of structure numbered 3. ![]()
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