Question

In the control of breathing, what is the factor that is most closely monitored by chemoreceptors?

The amount of ammonia in the blood

The amount of urea in the blood

Blood pressure

The amount of CO2 in the blood

Why do larger animals have complex internal systems to exchange nutrients and wastes with their environments?

Because wastes break down much faster in larger animals and become toxic more quickly

Because they often live in environments with less available oxygen

Because larger animals almost exclusively produce ammonia, which requires a specialized exchange surface to eliminate

Because there is not sufficient surface area on the outside of a large animal for the exchange required by their body mass (volume).

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

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

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

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

Answer 1

1.

In the control of breathing the amount of CO2 in the blood is most closely monitored by the chemoreceptors. This is because CO2 help in maintaining the pH and change in pH rapidly sense by the chemoreceptors.

2.

Larger animals have complex internal systems to exchange nutrients and wastes with their environments Because there is not sufficient surface area on the outside of a large animal for the exchange required by their body mass (volume).

3.

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