Neco Model Questions Vol1 2024 Biology Question 8

Practice essay / theory question 8 from the 2024 Neco Model Questions Vol1 Biology examination. This question covers Coordination, Nervous system, Endocrine system, Blood pressure regulation .

Neco Model Questions Vol1 2024 Biology Essay / Theory
Topics: Coordination Nervous system Endocrine system Blood pressure regulation
Question 8 NECO_MODEL_QUESTIONS_VOL1 • 2024 • BIOLOGY • essay

A sudden fall in arterial blood pressure activates both neural and hormonal mechanisms to restore perfusion.

Question Parts

( a )
Outline the baroreceptor reflex pathway that rapidly corrects the fall in blood pressure, naming the receptors, afferent, central and efferent components.
( b )
Describe the renin‑angiotensin‑aldosterone system (RAAS) that provides a longer‑term correction, indicating the organs involved and the specific actions of renin, angiotensin II and aldosterone.
( c )
Compare the time scales and mechanisms of the neural and hormonal responses, and explain why both are required for effective blood‑pressure regulation.
( d )
Propose a clinical scenario in which damage to one component of this system (e.g., baroreceptors) impairs regulation, and state a likely symptom that would be observed.

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About This Question

This is Neco Model Questions Vol1 2024 Biology Question 8. It is one of the essay questions from the 2024 Neco Model Questions Vol1 Biology examination.

The question covers Coordination, Nervous system, Endocrine system, Blood pressure regulation .

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