Igcse Model Questions Vol1 2018 Biology Question 8

Practice essay / theory question 8 from the 2018 Igcse Model Questions Vol1 Biology examination. This question covers Coordination .

Igcse Model Questions Vol1 2018 Biology Essay / Theory

Topic: Coordination

Question 8 IGCSE_MODEL_QUESTIONS_VOL1 • 2018 • BIOLOGY • essay

Coordination of the nervous system enables organisms to respond rapidly and accurately to internal and external stimuli.

Question Parts

( a )

Outline the complete pathway of a stretch reflex, naming each structure involved and the sequence of events from the sensory receptor to the effector muscle.

( b )

Explain how the brain integrates sensory information from the visual and vestibular systems to coordinate a voluntary reaching movement, referring specifically to the roles of the cerebellum and the primary motor cortex.

( c )

In a laboratory experiment a frog’s sciatic nerve is stimulated with increasing electrical current. Predict how the amplitude and frequency of the recorded action potentials in the attached muscle will change as the stimulus intensity is raised, and justify your prediction.

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About This Question

This is Igcse Model Questions Vol1 2018 Biology Question 8. It is one of the essay questions from the 2018 Igcse Model Questions Vol1 Biology examination.

The question covers Coordination .

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