A reflex occurs the iris of the human eye in response to changes in light levels - describe how these changes occur, referring to the changes in light level in your answer.
I would most likely present a figure of a dilated & undilated pupal and hopefully this will begin their thought process.
To receive full marks for this answer, I will be looking for the below points:• pupils dilate in low light levels because• circular muscles (in iris) relax • (and) radial muscles contract
BS
Related Physics GCSE answers
All answers ▸A wave with a constant velocity doubles its frequency. What happens to the wavelength?
What are Newton's 3 laws of motion?
Describe the forces acting on a skydiver over time, from the moment she jumps out of the plane until hitting the ground and the effect this has on her velocity. What happens when she opens her parachute?
What's the difference between weight and mass and how do I find one from the other?