Question

wednesday 9/10: respiration lab
in the lab, how do the respiratory and circulatory (cardiac) systems work together during exercise?
○ a) the respiratory system brings oxygen into the lungs, and the circulatory system pumps oxygen - rich blood to the muscles
○ b) the circulatory system controls breathing, and the respiratory system pumps blood to muscles.
○ c) both systems slow down to save energy during exercise.
○ d) the respiratory system breaks down food, and the circulatory system supplies nutrients to the lungs

Explanation:

• Option A: The respiratory system's role is to take in oxygen (e.g., through inhalation into the lungs), and the circulatory system (heart and blood vessels) transports oxygen - rich blood to muscles (which need oxygen for energy during exercise). This matches the actual functions of the two systems.
• Option B: The respiratory system controls breathing, and the circulatory system pumps blood, so this option has the functions reversed.
• Option C: During exercise, the body needs more oxygen and nutrients, so both the respiratory and circulatory systems speed up, not slow down.
• Option D: The digestive system breaks down food, and the respiratory system is for gas exchange (oxygen and carbon dioxide), not breaking down food. The circulatory system supplies nutrients to the whole body, not just the lungs in this context.

Answer:

A) The respiratory system brings oxygen into the lungs, and the circulatory system pumps oxygen - rich blood to the muscles