Final answer:
Tidal volume in respiration is analogous to stroke volume in cardiac physiology; both represent a single cycle volume in their respective systems.
Step-by-step explanation:
The tidal volume in respiration is analogous to the stroke volume in cardiac physiology. Tidal volume represents the amount of air that is inhaled or exhaled during normal breathing, while stroke volume is the amount of blood pumped by the heart with each beat. To understand this analogy fully, let's look at both terms in their respective systems:
- Respiratory System: Tidal volume is the volume of air moved into or out of the lungs during a normal breath.
- Cardiac System: Stroke volume is the volume of blood ejected by the left ventricle of the heart in one contraction.
Therefore, the correct answer to the question is B) Stroke volume. This is because both tidal volume and stroke volume measure a single cycle of activity within their respective systems - one breath in the respiratory system and one heartbeat in the cardiac system.