Question

question 3
why is carbon monoxide so deadly?
a acts as a systemic poison
b slows speed of carbonic anhydrase
c binds more readily than oxygen to hemoglobin, blocking oxygen transport
d inhibits release of surfactant
10 points
question 4
the physical interaction between the respiratory and the cardiovascular system takes place at which respiratory structure in a fish?
a insect alveoli
b gill filaments
c tracheoles
d bronchi
e operculum

Explanation:

For Question 3: Carbon monoxide's high affinity for hemoglobin (200x that of oxygen) blocks oxygen binding/transport, causing tissue hypoxia.
For Question 4: Fish use gill filaments for gas exchange—blood vessels in filaments interact with water to exchange O₂/CO₂, linking respiratory and cardiovascular systems.

Answer:

Question 3: C. binds more readily than oxygen to hemoglobin, blocking oxygen transport
Question 4: B. gill filaments