At the Venous Ends of the Pulmonary Capillaries

question 41

Multiple Choice

At the venous ends of the pulmonary capillaries...

• A) the Pco2 is higher in the capillaries than in the alveoli.
• B) the Pco2 is lower in the capillaries than in the alveoli.
• C) the Pco2 is equal in the capillaries and in the alveoli.
• D) the Pco2 is higher at first in the capillaries than in the alveoli, and then it is lower in the alveoli than in the capillaries.
• E) the Pco2 is lower at first in the capillaries than in the alveoli, and then it is higher in the alveoli than in the capillaries.

---

Definitions:

Local Reflex

Reflex of the intramural plexus of the digestive tract that does not involve the brain or spinal cord.

CNS

The central nervous system, consisting of the brain and spinal cord, coordinates body activities.

Nicotine

A stimulant and addictive substance found in tobacco products that acts on the nervous system.

Sympathetic Responses

Physiological reactions initiated by the sympathetic nervous system that prepare the body for 'fight or flight' situations, such as increased heart rate and blood flow.