A primary function of lymphocytes is to
A. produce enzymes that dissolve blood clots.
B. release substances that initiate blood clots.
C. phagocytize damaged cells.
D. act against foreign substances.
Answer: D
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In a case involving suspected thallium poisoning, which of the following findings would help prove the suspect's guilt?
A. Changes in the victim's fingerprints B. Changes in the amount of thallium in the victim's DNA molecules C. Changes in the victim's lung structure D. Changes in the concentration of thallium along the victim's hair shaft
Deep-sea sediments or sedimentary rocks
Answer the following statement(s) true (T) or false (F)
The plasma membrane of a neuron is more permeable to K+ because
A. of its positive electrical charge. B. Ca2+ block Na+ and Cl? channels. C. there are more leak ion channels for Na+ than K+. D. there are more leak ion channels for K+ than Na+. E. protein molecules cannot exit through the plasma membrane.
Where would the osteoclasts be located?
A) K
B) I
C) H
D) J
E) F