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LINKS to more puzzles: Chapter 1 Chapter 2a Chapter 2b Chapter 3b Chapter 4a Chapter 4b Chapter 5a Chapter 5b |
LINKS to related sites: aCross Development home page: Tosney home page Society for Developmental Biology Gilbert’s textbook home page Sinauer |
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1 selective affinities ___ (alter) during development 6 sound a snake makes 8 prefix meaning "toward"; as in cells will _ _vance over other cells when they adhere to them only lightly 10 _ _ _ _helium refers to the cellular organization in which cells are tightly connected to one another in sheets or tubes 11 epithelial cells can ___ (lose their connections and become individual cells) to form mesenchyme 14 if mixed cells interact to form an aggregate with the smallest interfacial free energy, they rearrange themselves into the most thermodynamically ___ pattern 16 big talk 17 adjacent cell surfaces _ _ _eract during development to localize cells in their proper sites within tissues and organs 19 insert an A for talk 20 an undergraduate degree, abbrev 21 to be contiguous or next to; one cell will ___ another cell and either adhere to it or move away from it 22 a thermodynamic ___ to explain sorting out is the differential adhesion hypothesis, in which the early embryo is viewed as existing in an equilibrium state until some changed gene activity alters the cell surface molecules; cells then move to restore an equilibrium 23 opposite of down 24 cells _ _cognize each other and extracellular matrix by using cell surface molecules 26 _ _ _ma_ cells are mesenchymal cells of the skin; if randomly mixed with epidermal cells they will migrate toward the center and reconstitute a histologically normal relationship 29 in the blastula, ___ (number) cells have the same affinity for each other 31 when amphibian embryo cells from different germ layers were recombined, in __ case did the cells remain randomly mixed 33 begin with a G to speak baby-talk, an M to speak cow-talk 34 _ _toderm is a germ layer that would assume an outside position in a sorting experiment 36 one way in which cells communicate with one another is by using ___ cues, soluble molecules that they secrete 40 a direction, abbrev 42 a heavy, radioactive substance, abbrev 43 _a_ Diego 44 morphogenesis requires changes in the composition of the cell _ _ _brane (surface); these changes can alter the adhesiveness of the cell and stimulate its movement 46 stop, or a goal 48 close or preferential association; differential cell affin_ _ _ is a dominant paradigm of morphogenesis 49 the __ (last) topography in cell aggregations is independent of the starting conditions 51 ocean 52 prefix meaning form, as in "_ _ _ _ _ _ _ _ _ogenesis is the development of organized multicellular arrangements such as tissues and organs." 54 _ _ bonucleic acid; _ _ bosome 56 preposition 58 that is, abbrev 59 a truth or datum 61 a cell ___ with other cells by adhering to them or by moving over them 64 making the _ _ more alkaline can dissociate embryonic amphibian tissues into single cells; normalizing it can then promote cell aggregation 65 extraterrestrial, one abbrev 66 a color 67 in the simplest form of the thermodynamic model, cells only need to have the same type of ____ (sticky substance) on their surfaces; in reality, cells have several types of adhesive molecules that change with time TOP |
1 insert an O for police 2 prefix referring to tissue: if you mix dermal and epidermal cells, they will move to reconstruct a normal relation, an example of a _ _ _ _ _typic reaggregation 3 a phone company, abbrev 4 unintelligible or foolish talk 5 during sorting out, interactions form a _ _erarchy (ordered system) as though their associations are based on differential adhesions among cells 6 a person who secretly observes others to obtain information 7 if homotypic adhesions (A-A or B-B) are strong but heterotypic (A-B) adhesions are nonexistant, then mixed A and B cells will form ____ aggregates 8 add an S for a long-eared, patient, sure-footed mammal 9 a cellular process important to morphogenesis is the ___ and removal of cells 10 prefix meaning upon, on, over; as in "_ _ _dermal cells will envelop dermal cells when combined with them." 11 cells can individually _ _tach from epithelia, a process called _ _ lamination 12 as epithelial cells change ____ (form) and grow, they remain attached to one another 13 mutineer, insurrectionist 15 old, ancient, antique 18 a southwestern state, abbrev. 20 _ _bonic plague 25 a diffusible ___ that cells use to communicate could be a hormone, a growth factor or a morphogen 27 dissociated, individual cells that reaggregate in a rotary culture will form a _ _ _nd ball of cells because they maximize their adhesions with one another 28 in the sea urchin, vegetal blastula cells ___ their affinity for one another at the gastrulation stage while simultaneously acquiring affinity for protein fibrils inside the blastula 30 A and B cells sort out when the average strength of A-B adhesions is ___ than the average strength of A-A or A-B adhesions 31 a northern plains state, abbrev 32 if cells fail to adhere to one another, they will separate like ___ and water 35 many cells communicate by direct ____ with one another 37 the ___ (last) position of reaggregated cells from amphibian germ layers reflected their embryonic positions, with ectoderm surrounding mesoderm and endoderm residing in the innermost layer: somehow cells sort out into their proper positions 38 negative conjunction 39 in the sea urchin blastula, cells initially have a high affinity for their neighbors and for the outer extracellular hyaline ___; as this affinity weakens, they gain affinity for fibers in the blastocoel cavity and move inside it 41 embryonic cells do not _ _tain (keep) a single stable relationship with other cells; they alter their surfaces and change their affinity and interactions as development progresses 44 molecules secreted by cells will form an extracellular ____ 45 microfilaments, abbrev 46 _ _doderm is a germ layer that would assume an innermost position in a sorting out experiment 47 development is a _ua_ (double) process requiring both differentiation of cells and their morphogenesis into intricate and precise arrangments 50 cells will _ _ _ _ _act sequentially with many different cells during development as their gene expression and the composition of their surfaces changes 51 a cellular process important to morphogenesis is changes in cell____ (form) 52 _ _ _enchyme refers to a cellular organization in which cells are unconnected to each other and operate as individual units 53 the ability of cell to _re_er (favor) adhesions with some cells more than with other cells is based on the balance of adhesion molecules on their surfaces 55 cells of two epithelia can merge with one another in a process called _ _ _ercalation 57 mine this, or a western state 58 during morphogenesis, a cell must reach its appropriate s_ _ _ (destination) 60 _ _anges in cell affinity are extremely important to the process of morphogenesis 62 cell surface molecules allow cells to _ _here to one another and to extracellular matrix 63 selective affinity among cells appears to be important for imparting position_ _ information to embryonic cells |
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