Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
26 Cards in this Set
- Front
- Back
|
Place the following in sequential order.
Gastrula, Blastula, Neurula |
Blastula, Gastrula, Neurula
|
|
|
yolk granules are located in which pole of the unfertilized egg?
|
vegetal pole
|
|
|
which pole has a pigmented upper surface in the unfertilized egg?
|
animal pole
|
|
|
blastocoel
|
the fluid filled cavity of the blastula
|
|
|
The equatorial band of the blastula will eventually become the _____
|
mesoderm
|
|
|
mesoderm
|
muscle, cartilage, bone, heart, blood, kidney
|
|
|
The animal region gives rise to what germ layer?
(blastula) |
ectoderm
|
|
|
ectoderm
|
epidermis and nervous system
|
|
|
During Gastrulation, what two dermal layers move to the inside?
|
endoderm and mesoderm
|
|
|
regulation
|
The ability of the embryo to develop normally even when some portions are removed or rearranged.
|
|
|
induction
|
one cell or tissue directs the development of another, neighboring tissue.
|
|
|
The dorsal lip of the blastopore contains what region?
|
The organizer.
|
|
|
why is it that no developmental process can be attributed to the function of a single gene?
|
Cell cell interactions define development.
|
|
|
how does cleavage differ from cell divisions?
|
in cleavage there is no increase in the mass of the embryo, only an increase int he number of cells
|
|
|
What is the main body axis?
|
the anterior posterior axis which runs from head to tail.
|
|
|
Where does the dorso-ventral axis run?
|
from the back to the belly (90deg to the AP axis)
|
|
|
Endoderm
|
gut,liver, lungs
|
|
|
determination
|
a stable change in the internal state of the cell. leading to a change in the proteins produced by the cell.
|
|
|
specified
|
when a cell isolated and cultured in the neutral environment of a simple culture medium away from the embryo develops according to its normal fate.
|
|
|
regulative
|
when the potential of the cell is greater than that indicated by their normal fate.
|
|
|
permissive induction
|
cell makes only one kind of response at a threshold of signal.
|
|
|
instructive induction
|
cells respond differently to different levels of signal.
|
|
|
list the three mechanisms (physical) of induction.
|
1.) diffusion of extracellular signal
2.) cell cell receptor interactions 3.) cell to cell transport via gap junctions. |
|
|
competence
|
ability of a cell to respond to a certain signal.
|
|
|
morphogen
|
a chemical whose concentration varies and which is involved in pattern formation.
|
|
|
Lateral inhibition
|
cells which begin to differentiate, inhibit adjacent cells from doing the same. (example feather formation)
|
