question archive 1)Indicate whether each of the following descriptions better applies to an asymmetric or a symmetric stem-cell division strategy and briefly explain your response
1)Indicate whether each of the following descriptions better applies to an asymmetric or a symmetric stem-cell division strategy and briefly explain your response
Subject:BiologyPrice: Bought3
1)Indicate whether each of the following descriptions better applies to an asymmetric or a
symmetric stem-cell division strategy and briefly explain your response.
a. This strategy predicts the number of stem cells in a population to remain strictly
constant after several rounds of cell division.
b. In This Strategy Cytoplasmic factors that control stemness are localized to one side of
the cell before cytokinesis.
c. This strategy is more flexible and can better accommodate the effect of environmental
factors.
d. This strategy is more consistent with observations in gut stem cells and other stem cells.
2)In each of the following examples of contact signaling between adjacent cells in the
mammalian gut epithelia, indicate whether the signaling is mainly mediated by Delta or Ephrin
signals. Briefly explain your answers.
a. Separation of crypt cell types from villus cell types
b. Regulation of stem-cell differentiation by Paneth cells
c. Differentiation of transit amplifying cells into either secretory cells or absorptive cells
