The term "respiration" in animals refers to the ____.
A) movement of oxygen into an animal only
B) movement of carbon dioxide out of an animal only
C) movement of oxygen into an animal and the movement of carbon dioxide out of the animal
D) binding of oxygen to hemoglobin molecules in the blood
E) diffusion of oxygen across a cell membrane

Question

The term "respiration" in animals refers to the ____.  
A) movement of oxygen into an animal only
B) movement of carbon dioxide out of an animal only
C) movement of oxygen into an animal and the movement of carbon dioxide out of the animal
D) binding of oxygen to hemoglobin molecules in the blood
E) diffusion of oxygen across a cell membrane

Quizplus · Accepted Answer

Respiration refers to both the process of oxygen entering an animal's body and the process of carbon dioxide leaving its body. Therefore, the correct choice is C. Choices A, B, D, and E only refer to one aspect of respiration and do not provide a complete definition.

The Term "Respiration" in Animals Refers to the ____