The most important stimulus for breathing in a healthy person is the body's need to rid itself of the blood gas called ________
A) carbon dioxide
B) oxygen
C) methane
D) nitrous oxide
A
Anatomy & Physiology
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An unknown molecule was detected in a tissue sample. The molecule is composed of carbon, hydrogen, and oxygen; appears to be a branching polymer; and is hydrophilic. This molecule is most likely a ________.
A. nucleic acid B. protein C. carbohydrate D. lipid
Anatomy & Physiology
The centrioles are microtubules that play a significant role in ATP and energy production.
a. true b. false
Anatomy & Physiology
What vitamin does the liver activate?
a. vitamin A b. vitamin B12 c. vitamin D d. vitamin E e. vitamin K
Anatomy & Physiology
Antigens are
A. something made by a white blood cell to destroy a pathogen. B. something that an antibody or T-lymphocyte binds to. C. disorders involving overactive immune systems. D. membrane receptors on B-lymphocytes.
Anatomy & Physiology