Development

Question 1

Secondary oocyte

Answer 1

An egg that has gone through meiosis I and is now at metaphase of meiosis II

Question 2

How does the sperm get to the egg?

Answer 2

Must first pass through the corona radiata, zona pellucida to trigger the acrosome reaction

Question 3

Acrosome reaction

Answer 3

Release of digestive enzymes that permit entry of the sperm nucleus into the egg

Question 4

What do the eggs release to form crosslinks?

Answer 4

cortical granules

Question 5

what two features fuse to form a single cell zygote?

Answer 5

A polar body and a mature ovum

Question 6

Once zygote is 16 cells, what is it known as?

Answer 6

Morula

Question 7

Blastocyst

Answer 7

Contains a fluid-filled cavity called a blastocoel

Question 8

Trophoblast

Answer 8

surround the fluid cavity and the trophoblast later forms the placenta

Question 9

After the blastocyst is the….

Answer 9

Gastrula

Question 10

what is the function of the gastrula?

Answer 10

Formation of three primary germ layers

Question 11

what are the three germ layers?

Answer 11

endoderm, mesoderm, ectoderm

Question 12

Neurulation

Answer 12

early development of the CNS. forms notocord and neuroplate, neurofolds, and neural tubes. Crest cells form the PNS

Question 13

First trimester

Answer 13

organogenesis

Question 13

First trimester

Answer 13

organogenesis

Question 14

Plcenta

Answer 14

highly vascular and brings the fetus in close, but not touching contact

Question 15

Fetal blood vessels

Answer 15

umbilical arteries and umbilical vein

Question 16

Sexual differentiation

Answer 16

mullerian duct- forms female

SRY- halts progression of mullerian duct

Question 17

Oxytocin

Answer 17

promotes uterine contractions during labor. As the uterus is stimulated to contract, it promotes more oxycotin release, which in turn causes more uterine contractions