Breathing is regulated by ________.
A) the diaphragm and chest muscles
B) the spinal cord
C) the circulatory system
D) control centers in the brain stem
Correct Answer:
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Q21: Leukemia _.
A)decreases the production of white blood
Q31: Oxygen is transported through the body mostly
Q32: Cigarette smoking _.
A)is responsible for about one
Q33: Which of the following can cause anemia?
Q34: You increase your risk of cardiovascular disease
Q35: Insects breathe using _.
A)lungs
B)tracheae
C)their entire outer skin
D)book
Q38: Earthworms use _ as their respiratory surface.
A)lungs
B)gills
C)their
Q39: Gas exchange requires a surface that is
Q40: Animals need O₂ because it _.
A)plays a
Q41: The cardiovascular system of a mouse works
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