Screening for Grave's Disease includes hormones such as _____.
Fill in the blank(s) with the appropriate word(s).
Ans: low TSH, elevated T3, and elevated T4
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Place the following steps in the correct order for a reflex arc: 1. Sensory neurons pass signals to interneurons.2. Nerve signals travel along motor fibers to an effector.3. Sensory receptors generate nerve signals.4. Interneurons synapse with motor neurons.5. There is a response to the stimulus.
A. 1,2,3,4,5 B. 3,4,1,2,5 C. 3,1,4,2,5 D. 2,4,1,3,5 E. 2,1,3,4,5
Which of the following situations would be MOST likely to produce a new species?
A. A new group of polyploid individuals arises by an abnormal mitosis and can only reproduce with each other. B. Several individuals join an existing population and introduce new alleles to the population. C. Several individuals colonize a new area but continue to migrate back to the original colony to reproduce with the ancestral population. D. An existing species becomes subdivided by the effects of a glacier and the resulting groups remain physically isolated from each other for thousands of years; when united they are still able to reproduce between groups. E. A volcano erupts and kills all of the frogs on an island. New frogs colonize the island and begin reproducing rapidly because there are no predators.
An undifferentiated CD4+ TH0 cell can undergo differentiation into a number of different cells, which include all of the following EXCEPT
A. TH17 B. TH2 C. TC D. TH1 E. TReg
The CAM pathway ____
a. involves only the Calvin-Benson cycle b. involves only the C4 cycle c. is used by plants in humid regions d. is also known as photorespiration e. needs day and night for completion