#Question id: 11484
#Unit 7. System Physiology – Animal
Two students studying physiology taste a known "bitter" substance, and both report sensing bitterness. They then sample another substance. Student A reports sensing both a bitter taste and a salty taste, but student B reports only a salty taste. What is the most logical explanation?
#Question id: 16788
#Unit 13. Methods in Biology
he arithmetic mean between a " 1 and b, then n is equal to #Question id: 11380
#Unit 10. Ecological Principles
Which of the following is/are NOT valid explanation(s) for the observed pattern of species richness?
#Question id: 18586
#Unit 7. System Physiology – Animal
#Question id: 5238
#Unit 5. Developmental Biology
all tissue types possess a unique stem cell niche, and despite many differences among the niche architecture of different tissues, several common principles of stem cell regulation can be applied to all environments. These principles involve extracellular mechanisms leading to intracellular changes that regulate stem cell behavior.
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Column A |
Column B |
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I. Extracellular regulatory mechanisms |
i. Regulation by endocrine, paracrine, or juxtacrine mechanisms |
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II. Intracellular regulatory mechanisms |
ii. Regulation by a network of transcription factors |
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iii. Epigenetic regulation |
|
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iv. Regulation by cell-to-cell and cell-to-matrix adhesions |
|
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v. Regulation by cytoplasmic determinants |
Match the following regulatory mechanism (column A) with the factors that regulate stem cell behavior (column B).