Question

the thalamus is part of the ______.
○ crs
○ pns
○ cns
○ pms
question 23
1 pts
in cystic fibrosis, parts of the respiratory tract can become clogged with mucus, inhibiting gas exchange. the area(s) of the respiratory tract where gases are directly exchanged is/are the
○ diaphragm.
○ alveoli.
○ trachea.
○ bronchi.

Explanation:

First Question (Thalamus)

The thalamus is a structure in the brain. The Central Nervous System (CNS) consists of the brain and spinal cord. CRS is not a standard nervous system division, PNS (Peripheral Nervous System) includes nerves outside CNS, and PMS is not related to nervous system divisions here. So the thalamus is part of CNS.

Gas exchange in the respiratory system occurs in the alveoli, where oxygen and carbon dioxide are exchanged between lungs and blood. The diaphragm is a muscle for breathing, trachea and bronchi are air - conducting passages, not sites of gas exchange.

Answer:

C. CNS

Second Question (Cystic Fibrosis Gas Exchange)