Counter-current flow in fish gills refers to:
Show answer and explanation
Correct answer: Blood and water flowing in opposite directions
In counter-current flow, blood flows opposite to water direction. This maintains a diffusion gradient for efficient oxygen uptake.
Practice all 20 Respiratory Adaptations: Altitude and Diving questions
Keep practicing
More Respiratory Adaptations: Altitude and Diving questions
- Why is oxygen extraction more difficult underwater than in air?
- Which adaptation allows aquatic mammals like whales to remain submerged for long durations?
- In underwater diving mammals, oxygen conservation is aided by:
- Which factor primarily triggers altitude sickness in humans?
- Fish ventilate their gills mainly by:
- Which adaptation improves oxygen diffusion in high-altitude lungs?