Igcse Model Questions Vol1 2021 Biology Question 8

Practice essay / theory question 8 from the 2021 Igcse Model Questions Vol1 Biology examination. This question covers Coordination .

Igcse Model Questions Vol1 2021 Biology Essay / Theory

Topic: Coordination

Question 8 IGCSE_MODEL_QUESTIONS_VOL1 • 2021 • BIOLOGY • essay

Coordination of activities in the human body is achieved through the nervous and endocrine systems.

Question Parts

( a )

Describe the complete pathway of a stretch reflex, naming all structures involved from the sensory receptor to the effector muscle.

( b )

Explain how calcium ions facilitate neurotransmitter release at a chemical synapse and how the signal is terminated.

( c )

Compare the speed of nerve impulse transmission in myelinated and unmyelinated nerve fibres and explain why the difference occurs.

( d )

Multiple sclerosis involves loss of myelin in the central nervous system. Predict two effects this demyelination can have on a person’s coordination and propose one therapeutic approach for each effect.

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About This Question

This is Igcse Model Questions Vol1 2021 Biology Question 8. It is one of the essay questions from the 2021 Igcse Model Questions Vol1 Biology examination.

The question covers Coordination .

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