Carbon dioxide is produced as a result of
A) metabolic activity.
B) carbon monoxide instability.
C) oxygen synthesis during aerobic respiration.
D) the breakdown of water into oxygen.
E) glucose synthesis.
A) metabolic activity.
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The state of equilibrium, or fairly constant interval environment, in the body is called ________.
Fill in the blank(s) with the appropriate word(s).
The __________ is a low-pitched sound caused by vibration of the atrioventricular valves and surrounding fluid as the valves close at the beginning of ventricular systole.
a. first heart sound b. second heart sound c. third heart sound d. fourth heart sound
What function of the muscular system is performed when a person's facial expression can tell you how they feel?
A. Communication B. Stability C. Movement D. Heat production
Which blood vessel carries blood away from the heart?
A. Vein B. Capillary C. Artery D. All of these vessels carry blood away from the heart.