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These questions atomic number 18 quite synoptic in their approach. They have been change integrity into separate sections although you will drive to look at altogether papers to see how they be synoptically organised. There argon a couple from other syllabuses to trade topics new to the specification. The nervous frame and nervous transmission (Text record book pages 196-216) Reflex Arcs Unit 5 sample paper dubiety 6 The retina of a mammals nerve heart contains millions of receptor cubiclephones which are highly sensitive to light. These receptor cells are protected from excessively bright light by the iris. The guide below shows part of a nerve cell way involved in the reflex controlling the size of the school-age churl by the iris. (a) (i) Put a cross in the cutting out next to the arrow that correctly shows he direction of trend travel in cell A. (ii) Identify the type of neurone for cell A and cell B by putting a cross in the correct box in the bilk below. | Relay neurone| Motor neurone| Sensory neurone| cadre A| | | | cellular phone B| | | | June 2005 Q4. The graph below shows the effect of light tawdriness on the knowledge domain of the pupil in the gentlemans gentleman eye. (a) (i) mark the effect of changing light intensity on the area of the pupil. (1) (ii) Explain how the muscles in the eye bring closely this change.

(2) (b) change over in area of the pupil is controlled by a reflex action. In this pupil reflex, name (i) the receptor the effector (1) (ii) Explain why the pupil reflex leg ato occurs in an unconscious person. ...If ! you extremity to get a encompassing essay, order it on our website: BestEssayCheap.com

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