Question

Partitioning of gas exchange among respiratory organs in amphibians:

A) Pulmonary ventilation
B) Cutaneous respiration
C) Buccal pumping
D) Gastrovascular respiration

Answer 1

Gas exchange in amphibians involves pulmonary ventilation, cutaneous respiration, and buccal pumping.

Step-by-step explanation:

In amphibians, the partitioning of gas exchange among respiratory organs includes:

1. Pulmonary ventilation: This is the process of breathing in which air is conducted to and from the lungs. It involves the movement of air in and out of the lungs through the respiratory system.
2. Cutaneous respiration: Amphibians also exchange gases through their skin. Their skin contains a dense network of capillaries that facilitate gas exchange between the external environment and the circulatory system.
3. Buccal pumping: Amphibians use a buccal pump mechanism to force air in and out of their lungs. They create a pressure gradient by alternately closing and opening their mouth and nostrils, causing air to flow into and out of their lungs.
4. Gastrovascular respiration: This term is not directly related to gas exchange in amphibians. It refers to the exchange of gases, nutrients, and waste products that occurs in some organisms like jellyfish and flatworms in their gastrovascular cavity.