Medical Quiz

Circulation and Excretion Quiz

Water across the gills of fish and the blood in the gills does in opposite direction enhancing the diffusion of oxygen from the water into the blood. What is this flow in the opposite direction called?

A. undirectional flow

B. countercurrent exchange

C. atriventricular exchange

Select your answer:


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Other quiz:

Cells and Organ Systems › View

The heart has ___ chambers.
A. 1
B. 2
C. 3
D. 4

Musculoskeletal System › View

The shoulder is an example of what joint?

A. saddle

B. ball and socket

C. hinge

D. gliding