Some animals such as fish use a countercurrent exchange system to enhance respir
ID: 163587 • Letter: S
Question
Some animals such as fish use a countercurrent exchange system to enhance respiration. If oxygen levels in water were to decrease by 20%, which of the following would help fish to compensate?
Question 23 options:
A narrowing of the capillary diameters around the gills
A decrease in the generation of new red blood cells
A transition to the parallel current exchange system
A lengthening of the capillaries undergoing countercurrent exchange
Accelerating blood flow through the capillaries
A narrowing of the capillary diameters around the gills
A decrease in the generation of new red blood cells
A transition to the parallel current exchange system
A lengthening of the capillaries undergoing countercurrent exchange
Accelerating blood flow through the capillaries
Explanation / Answer
A lengthening of the capillaries undergoing countercurrent exchange.
This will allow the fish to have more surface area of the capillaries to be available for gaseous exchange in water with low oxygen concentration.
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.