Which term refers to muscles that are attached to bones, and cause bones to move at their joints when they contract?
A. skeletal muscles
B. smooth muscles
C. involuntary muscles
D. ligament tissues
E. cardiac muscles
Answer: A
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What formula correctly represents the behavior of CO2 in the blood?
A. CO2 + H2O « H2CO3 + CO B. CO2 + H+ « HCO3+ « H2O + H2CO3 C. CO2 + HCO3- « H+ + H2O + H2CO3 D. CO2 + H2O « H2CO3 « HCO3- + H+ E. CO2 + H2CO3 + O2 « H2O + CO2 + H2CO3
The indirect ELISA test is commonly used to diagnose infections caused by all of the following except ________.
A. HIV B. hepatitis A virus C. hepatitis C virus D. Helicobacter E. rubella virus
An emergency room physician has withdrawn blood from a vessel in your arm. The dark red color of the blood indicates that it was
A) on its way to the tissues of the arm. B) going away from the heart. C) coming from the lungs. D) taken from a vein. E) taken from an artery.
In which organelle are lipids synthesized and modified within the eukaryotic cell?
A) the Golgi apparatus B) the vesicle C) the rough endoplasmic reticulum D) the smooth endoplasmic reticulum E) the lysosome