bio cht 42 quiz

what sets the developmental fate of a cell, and

what type of cell it will become

• Morphogensis

• Growth

• Differenatation

• Determination

will cause the cervix to dilate until it is large enough for the baby to pass through. (10cm)?

• Hormons

• Stimuli

•stretching of the uterus, pressure of the fetal head on the cervix

•These pressures will trigger release of oxytocin from the posterior pituitary which causes contraction of the uterine muscle

•Positive feedback loop

occurs by what?

• Hormons

• stimuli

*Internal organs mature

*  Digestive system begins to function, liver stores glycogen, kidneys produce urine,  brain undergoes sleep and wake cycles

-These happen during which trimester?-

• first

• second

• third

*Limbs elongate, fingers, toes, and facial

*   features become well formed

*  Fetal movements are first felt by the

   mother

*  Nervous system undergoes rapid

   development

-These happen during which trimester?-

• first

• second

• third

An embryo becomes a fetus in which trimester

• first

• second

• third

Gestation in humans lasts about days or _ months.

• 261,8

• 266,9

• 266,8

• 261,9

Hox genes closer to the _` end of the gene grouping are expressed later and in a more posterior part of the embryo

• 3

• 5

Hox genes closer to the _’ are expressed first and in the anterior of the embryo

• 3

• 5

break loose from the neural tube after fusing and contribute to development of the peripheral nerves which grow out to the body tissues and back to the spinal cord is what?

• Somites

• Neural Crest cells

• Stem cells

• Morphogen