BIO 212 unit 3 vocab

meristems

stem cells in plants that produce plant structures

cytoplasmic determinants

regulatory molecules uniquely distributed to daughter cells

cell differentiation

cells specialize at specific times and places in stepwise fashion

pluripotent

stem cells capable of giving rise to MOST tissues

genetic regulatory cascade

set of linked regulatory genes that trigger expression of more regulatory genes

homeotic mutations

lead to the wrong body part forming in the wrong place

cell movement

cells can regulate the plane of cell division and explained in specific direction, casing changes in shape

stem cells

divide and produce 2 daughter cells that differentiate into specialized cells

multipotent

stem cells that are more restricted in their capabilities, more tissue specific

autocrine signals

act on the same cell that secretes them

paracrine signals

diffuse locally and act on nearby cells

endocrine signals

hormones carried between cells by blood or other body fluids

neural signals

diffuse a short distance between neurons

neuroendocrine signals

hormone released from neurons

GTP

ACTIVATES the G protein

GDP

DEACTIVATES the G protein

lipid insoluble signals

bind to receptors on the cells surface

lipid SOLUBE signals

bind to intracellular receptors