Waec Model Questions Vol1 2017 Biology Question 8

Practice essay / theory question 8 from the 2017 Waec Model Questions Vol1 Biology examination. This question covers coordination, nervous system, musculoskeletal system .

Waec Model Questions Vol1 2017 Biology Essay / Theory
Topics: coordination nervous system musculoskeletal system
Question 8 WAEC_MODEL_QUESTIONS_VOL1 • 2017 • BIOLOGY • essay
Waec Model Questions Vol1 2017 Biology Question 8 diagram

The diagram shows a cross‑section of the human forearm with the structures labelled A to H.

Question Parts

( a )
Identify each labelled structure (A–H) in the diagram.
( b )
Describe the complete pathway of a motor impulse that results in flexion of the middle finger, starting from the cerebral cortex to the muscle that performs the movement. Include all neural and muscular structures shown in the diagram.
( c )
A lesion has damaged the median nerve at the level shown in the diagram. Predict the resulting functional deficits in terms of (i) muscle actions and (ii) sensory loss in the forearm and hand. Explain the basis for each deficit.
( d )
If the diameter of the radial artery is 3 mm and that of the ulnar artery is 2 mm, calculate the ratio of their cross‑sectional areas (radial : ulnar). Show your working.

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About This Question

This is Waec Model Questions Vol1 2017 Biology Question 8. It is one of the essay questions from the 2017 Waec Model Questions Vol1 Biology examination.

The question covers coordination, nervous system, musculoskeletal system .

View More Waec Model Questions Vol1 2017 Biology Questions More Waec Model Questions Vol1 Practice Questions Back to Questions

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