Chemicals that become ionic conductors when dissolved in water are called:
A. ions.
B. exocytes.
C. endocytes.
D. electrolytes.
Ans: D. electrolytes.
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A solution of a pH above 7 is called ________.
acidic neutral basic isotonic
A tissue sample has the following characteristics: large cells with many processes, one which is very long; smaller cells scattered amongst the larger cells. Which of the following statements accurately identifies the tissue?
A. The tissue is dense irregular connective elastic tissue. The large cells are fibroblasts with attached collagen fibers, and the smaller cells are glia. B. The tissue is nervous tissue. The large cells are fibroblasts with dendrites and collagen fibers, and the smaller cells are squamous cells. C. The tissue is nervous tissue. The large cells are neurons with dendrites and a long axon, and the smaller cells are glia. D. The tissue is dense regular connective tissue. The large cells are neurons with dendrites and a long axon, and the smaller cells are fibroblasts.
Nuclear receptors that have been identified and their genes cloned, but their hormone ligands are unknown are called ________.
A. unknown ligands B. nongenomic receptors C. orphan receptors D. transcription factors
Pineal gland production of melatonin is stimulated by the ________ of the hypothalamus.
A. paraventricular nuclei B. suprachiasmatic nucleus C. supraoptic nuclei D. None of the choices are correct.