Neco Model Questions Vol1 2024 Biology Question 5

Practice essay / theory question 5 from the 2024 Neco Model Questions Vol1 Biology examination. This question covers Transport .

Neco Model Questions Vol1 2024 Biology Essay / Theory
Topic: Transport
Question 5 NECO_MODEL_QUESTIONS_VOL1 • 2024 • BIOLOGY • essay

A 17‑year‑old student performed a step‑test to investigate the effect of moderate exercise on the circulatory transport system. The data obtained are: - Resting heart rate (HR₁): 72 beats per minute (bpm) - Heart rate after exercise (HR₂): 110 bpm - Resting stroke volume (SV₁): 70 mL per beat - Stroke volume after exercise (SV₂): 90 mL per beat Using this information, answer the following questions.

Question Parts

( a )
Calculate the cardiac output (CO) at rest and after exercise. Express your answers in litres per minute (L min⁻¹).
( b )
State two physiological mechanisms that cause the increase in stroke volume during moderate exercise and briefly explain how each mechanism works.
( c )
Discuss how the increase in cardiac output assists in the delivery of oxygen to, and removal of carbon dioxide from, the active skeletal muscles during exercise.
( d )
Compare the transport of water in plants (through the xylem) with the transport of blood in animals, focusing on the principal driving forces and the structural adaptations that facilitate each type of transport.

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About This Question

This is Neco Model Questions Vol1 2024 Biology Question 5. It is one of the essay questions from the 2024 Neco Model Questions Vol1 Biology examination.

The question covers Transport .

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