Which Statement Regarding the Autonomic Nervous System's Role in the Regulation

question 11

Multiple Choice

Which statement regarding the autonomic nervous system's role in the regulation of heart rate is true?

• A) Parasympathetic influences increase heart rate.
• B) Sympathetic influences are predominantly present.
• C) Parasympathetic influences are only compensatory.
• D) Both sympathetic and parasympathetic influences are normally active.

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Definitions:

Lava Dome

A dome-shaped mountain or hill of at least partly solidified lava generally of felsic to intermediate composition.

Lava Flow

Magma that erupts onto the surface and flows downhill from the vent; also the solidified body of rock formed by this magma.

Pyroclastic Flow

A fast-moving current of hot gas and volcanic materials that flows down the sides of a volcano during an explosive eruption.

Eruption Column

A column of gases, ash, and volcanic rock emitted into the atmosphere during a volcanic eruption, which can affect climate and aviation.