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

You might also like to view...

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

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