Which of the following is the most abundant gas in the air?
A) oxygen (O2)
B) nitrogen (N2)
C) water vapor (H2O)
D) carbon dioxide (CO2)
E) hydrogen (H2)
B) nitrogen (N2)
Anatomy & Physiology
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Which of the following constitutes most of the total body weight in humans?
A) water B) acids C) bases D) salts E) organic molecules
Anatomy & Physiology
Which system is most involved with the transport of cells and dissolved materials throughout the body?
A. Endocrine B. Cardiovascular C. Digestive D. Urinary
Anatomy & Physiology
How many ATP would be formed from an 18-carbon fatty acid?
A. 60 B. 32 C. 90 D. 122
Anatomy & Physiology
Which of the following is often called the pacemaker of the heart?
A) Purkinje fibers B) sinoatrial (SA) node C) atrioventricular (AV) bundle (bundle of His) D) atrioventricular (AV) node
Anatomy & Physiology