You are testing a new chemotherapy drug that blocks a kinase in the cytoplasm that helps carry signals to the nucleus causing the cell to divide. If you expose cells to the drug at the same time you administer a hormone that should cause the cell to divide, which of the following steps would be blocked?
A. signal transduction
B. activation of transcription factors
C. receptor activation
D. cell division
Answer: D
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When studying fluid and electrolyte loss during exercise, Robert Cade found that human sweat has sodium and chloride concentrations that are ______ those found in the blood.
A. higher than B. lower than C. equal to D. extremely variable from person to person relative to E. There is no sodium or chloride in sweat.
Which of the following organisms is the causative agent of Hansen's disease (leprosy)?
A. Pseudomonas aeruginosa B. Mycobacterium avium C. Mycobacterium leprae D. Mycobacterium smegmatis
Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer?
What will be an ideal response?
To which class of neurotransmitters does dopamine belong?
a. acetylcholine b. monoamines c. amino acids d. neuropeptides e. gaseous neurotransmitters