Multiple Choice
When you hold your breath, which changes in one or more blood gases leads initially to the urge to breathe again?
A) rising carbon monoxide level
B) rising carbon dioxide level
C) falling carbon monoxide level
D) rising carbon dioxide level and falling carbon monoxide level
Correct Answer:

Verified
Correct Answer:
Verified
Q37: If your blood pressure were 120/70, it
Q38: <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB7803/.jpg" alt=" -In this figure,
Q39: Together, inhalation and exhalation are referred to
Q40: The following figure illustrates _. <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB7803/.jpg"
Q41: <b>Scenario</b><br>Blood flowing away from the heart is
Q43: Which blood vessels have thin, leaky walls?<br>A)capillaries<br>B)venules<br>C)arteries<br>D)veins
Q44: Which is a characteristic of open circulatory
Q45: Veins carry _.<br>A)blood away from the heart<br>B)oxygen-rich
Q46: <b>Scenario</b><br>Yawning is a reflexive action that is
Q47: One type of electrical defect in the