A vaccination is an example of _____ immunity.
A) naturally acquired active
B) artificially acquired active
C) artificially acquired passive
D) naturally acquired passive
Answer: B) artificially acquired active
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Bones that have thin parallel surfaces are
A) long bones. B) flat bones. C) sesamoid bones. D) short bones. E) irregular bones.
The function of the ventricular conduction system of the heart is to
a. spread the action potential throughout the ventricle to ensure a single, coordinated contraction of the both ventricles b. spread the action potential in the absence of sympathetic stimulation c. spread the action potential throughout the atria and ventricles d. slow down the original action potential so it has time to spread through the ventricles evenly e. perform both a and d
Which accurately describes lipase?
A. It catalyzes the breakdown of triglycerides into monoglycerides and free fatty acids. B. It is secreted by the endocrine pancreas. C. It is mainly produced in the liver, and secreted into the small intestine. D. It is produced in the exocrine pancreas, and catalyzes the degradation of chylomicrons into proteins and fats. E. It emulsifies lipids.
Norepinephrine has the following effect on pacemaker cells:
A) Increased sodium influx. B) Increased potassium influx. C) Increased ATPase activity. D) Decreased calcium influx.