In cell signal propagation, what does dimerization do?
a. moves water across the plasma membrane in large quantities
b. allows activated receptors to interact extracellularly with the surrounding environment
c. enables the intracellular domains of the receptors to activate each other
d. shuts down the signaling pathway
c. enables the intracellular domains of the receptors to activate each other
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Temperate deciduous forests generally have ____ annual precipitation levels and ____ temperatures than boreal forests
a. higher; higher b. the same; lower c. the same; higher d. lower; lower e. lower; the same
How many dendrites does each olfactory neuron extend into the olfactory epithelium?
a. one b. twenty c. five d. two
The Social Readjustment Rating Scale, constructed by Holmes and Rahe, measures the stress in a person's life on the basis of _____.
A. life changes B. stress tolerance C. daily hassles D. the balance between eustress and distress
Which of the following directional reference pairs consists of anatomic equivalents when referring to the human body?