Question

Figure 40.12A
 
-Blanks "A" and "B" should be labeled,respectively,____.  
A) does not gulp; loss 
B) does not gulp; gain 
C) gulps; loss 
D) gulps; gain 
E) does not gulp; pump

Accepted Answer

The structure labeled as "A" is the operculum, which covers the gills of the fish. The structure labeled as "B" is the spiracle, which allows water to flow over the gills when the fish is actively gulping water. Therefore, the correct choice is C, which indicates that the fish gulps water to allow for gas exchange across the gills and experiences a loss of water through this process.

Figure 40.12A -Blanks "A" and "B" should be labeled,respectively,____.

Figure 40.12A

-Blanks "A" and "B" should be labeled,respectively,____.