How Do Large-Mass Stars in the Upper Region of the Main

question 39

Multiple Choice

How do large-mass stars in the upper region of the main sequence produce energy?

• A) by fusing hydrogen using the proton-proton chain
• B) by fusing hydrogen using the CNO cycle (carbon-nitrogen-oxygen)
• C) by fusing hydrogen using both the CNO ccle and the proton-proton chain
• D) by fusing hydrogen using the HNO ccle (hydrogen-nitrogen-oxygen)
• E) by fusing helium using the HeNO ccle (helium-nitrogen-oxygen)

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Definitions:

Physiology

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Heart Rate

The number of heartbeats per unit of time, typically expressed as beats per minute (BPM), indicating cardiovascular activity and fitness levels.

Parasympathetic Nervous System

part of the autonomic nervous system responsible for conserving energy and lowering the body's response after activation of the "fight or flight" system.

Digestion

The physiological process by which food is broken down into smaller components that can be absorbed and assimilated by the body.