If you spin a tube of blood in a centrifuge, which component of the blood is the most abundant?
A. Platelets
B. Red blood cells
C. Plasma
D. White blood cells
Answer: C
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The tough layer of waterproof material that makes up the outermost part of the epidermis is the stratum lucidum.
Answer the following statement true (T) or false (F)
In the lungs, an example of the body's reserve capacity is that
A) pulmonary blood flow is completely under the control of the autonomic nervous system, dilating arteries and arterioles to adjust blood flow. B) capillary beds in the lungs are reversibly collapsible, allowing blood to be shunted to additional areas during exercise. C) some areas of the lung can be closed off during rest and opened again when needed during exercise. D) All of the statements are true. E) None of the statements are true.
Which of the following structures is the weakest portion of the femur, and is a common site of fracture in a "broken hip"?
A. Neck B. Greater trochanter C. Lesser trochanter D. Head E. Fovea capitis
Which function of the respiratory system is the amount of carbon dioxide exhaled directly related to?
A. Gas exchange B. Speech C. Acid-base balance D. All of the answers are correct.