Question

The respiratory and cardiovascular systems of vertebrate animals work in tandem to transport oxygen to metabolizing tissues and to eliminate carbon dioxide as a waste gas. Which of the following statements accurately describes how these systems interact for gas exchange?

The premise of the question is incorrect. The cardiovascular and respiratory systems are completely independently regulated by the body, so that one does not affect the other

The rate of oxygen transport by diffusion across the lungs must generally match the rate of transport by the circulatory system.

Bulk flow of gases and solutes works well over very short distances, whereas diffusion is effective only over long distances.

The rate of gas exchange by diffusion need not match rates of ventilation or circulatory transport.

Answer 1

ANS... transport of gases in human takes palce mainly through blood ,but we can not say that these two systems are regulated by a same machanism, as we know that in respiration oxygen enters through nostrils and ultimately reaches to lungs where from it is diffused into the blood and combines with a hemoglobin pigment that carries this oxygen in the form of oxyhemoglubin to all body cells and from body cells it carries carbin dioxide in the form of carboxy hemoglobin to lungs where from it is expelled out through nostril but carbon dioxide is maximum transported as a bi corbonate ion.