The rate and depth of normal breathing are determined by
A) oxygen levels in the blood.
B) carbon dioxide levels in the blood.
C) a pacemaker in the diaphragm.
D) a pacemaker in the intercostal muscles.
E) carbon monoxide levels in the blood.
Correct Answer:
Verified
Q18: During inspiration, intercostal muscles function to
A) flatten
Q19: How does external respiration differ from internal
Q20: During exhalation, the pressure inside the lungs
A)
Q21: Which one of the following is a
Q22: Oxygen-rich blood flows through the heart
A) by
Q24: Which of the following results from the
Q25: Oxygen and carbon dioxide are exchanged with
Q26: The trachea is completely surrounded by rings
Q27: Oxygen moves from the lungs into the
Q28: A condition in which wheezing occurs with
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