When Central Chemoreceptors Detect a Drop in the PH of the Cerebrospinal

question 56

Multiple Choice

When central chemoreceptors detect a drop in the pH of the cerebrospinal fluid,

• A) medullary respiratory centers trigger an increase in rate and depth of breathing.
• B) medullary respiratory centers trigger a decrease in rate and depth of breathing.
• C) pontine respiratory centers trigger a decrease in rate and depth of breathing.
• D) the vagus and phrenic nerves stimulate decreased production of the catalyst carbonic anhydrase.

---

Definitions:

Sympathetic Fibres

Nerve fibers of the sympathetic nervous system that are involved in the body's fight or flight response, affecting functions such as heart rate and blood pressure.

Afferent Nervous System

Part of the peripheral nervous system that carries sensory information from the sensory organs to the brain.

Efferent Nervous System

Part of the nervous system responsible for carrying signals away from the central nervous system towards muscles to cause movement.

Sympathetic Nervous System

A branch of the autonomic nervous system responsible for the body's 'fight or flight' response, preparing the body for action in stressful situations.