Which of the Following Is an Example of Countercurrent Exchange

question 47

Multiple Choice

Which of the following is an example of countercurrent exchange?

• A)the flow of water across the gills of a fish and that of blood within those gills
• B)the flow of blood in the dorsal vessel of an insect and that of air within its tracheae
• C)the flow of air within the primary bronchi of a human and that of blood within the pulmonary veins
• D)the flow of water across the skin of a frog and that of blood within the ventricle of its heart
• E)the flow of fluid out of the arterial end of a capillary and that of fluid back into the venous end of the same capillary

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Definitions:

Problem

A situation, question, or matter in need of a solution or explanation.

Secondary Research

The process of gathering information from previously published sources.

Observational Studies

Research methods where subjects are observed in their natural environment without intervention from the researchers.

Interpreting Results

The process of analyzing and drawing conclusions from data or outcomes of a study or experiment.