Bruce has colorectal cancer that has spread to his lymphatic system. He is given a drug that is an angiogenesis inhibitor. The drug works by
A. cutting off the supply of ATP to cancer cells.
B. halting cell division only in tumor cells.
C. starving tumors by cutting off their blood supplies.
D. stimulating new blood vessels to serve tissue damaged by the cancer.
Answer: C
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Secondary brain injuries include all of the following, EXCEPT:
A) axonal injury. B) cerebral edema. C) cerebral ischemia. D) intracranial hemorrhage.
Neurons have extremely long cytoplasmic extensions. Their chemical signals are produced in one portion of the cell, but released from a distant location. How are the chemicals transported?
A. On myosin filaments B. On intermediate filaments C. On the Golgi apparatus D. Via lysosomes E. On microtubules
What causes the heart valves to open and close?
a. action potentials in vagus nerve b. electrical connection with vagus nerve c. differences in blood pressure across the valve
When a few intracellular mediator molecules activate several enzymes, and each of these activated enzymes activate still other enzymes, the hormone has initiated
A. a cascade effect. B. a double loop effect. C. a protein kinase effect. D. a cyclic effect. E. a negative feedback cycle.