Science 30 January 2000 Diploma Examination

Use the following information to answer the next question.
A reflex arc dictates the eyes’ response to bright light.
Structures in Reflex Arc
1 interneuron
2 effector
3 sensory neuron
4 motor neuron
Numerical Response
4. When the eye responds to a bright flash of light, electrical impulses move through
the structures of the reflex arc in the sequence _____, _____, _____, _____.
(Record your four-digit answer in the numerical-response section on the answer sheet.)
Use the following information to answer the next question.
Diagram of the Human Eye
Light
rays
1
2
3
4
Numerical Response
5. Match each of the structures of the eye numbered above with its appropriate named below.
Retina ______ (Record in the first column.)
Iris ______ (Record in the second column.)
Cornea ______ (Record in the third column.)
Lens ______ (Record in the fourth column.)
(Record your answer in the numerical-response section on the answer sheet.)
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