Neco 2022 Biology Question 8

Practice essay / theory question 8 from the 2022 Neco Biology examination. This question covers coordination, circulatory system .

Neco 2022 Biology Essay / Theory

Topics: coordination circulatory system

Question 8 NECO • 2022 • BIOLOGY • essay

The diagram shows a labelled schematic of the human heart and the major blood vessels involved in systemic and pulmonary circulation.

Question Parts

( a )

Identify the structures labelled in the diagram:

( ) Right Atrium

( ) Right Ventricle

( ) Aortic Valve

( ) Pulmonary Trunk (Pulmonary Artery)

( b )

Describe the complete pathway of a drop of blood that enters the right atrium from the systemic circulation and returns to the left atrium, naming each chamber and vessel it passes through in the correct order.

( c )

Explain how the heart rate is increased during moderate exercise, mentioning the roles of the autonomic nervous system and any hormones involved.

( d )

A person’s resting heart rate is 70 beats per minute (bpm). During moderate exercise it rises to 115 bpm. Calculate the percentage increase in heart rate. Show your working.

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About This Question

This is Neco 2022 Biology Question 8. It is one of the essay questions from the 2022 Neco Biology examination.

The question covers coordination, circulatory system .

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