Fou 1 - Embryology

Question 1

What is the morula?

Answer 1

The blastocyst

Question 2

Which are the two types of cells that makes up the blastocyst?

Answer 2

The inner cell mass and the trophoblast.

Question 3

What type of cell to will be come the placenta?

Answer 3

Trophoblast.

Question 4

What will the inner cell mass will be come?

Answer 4

The fetus.

Question 5

Which is the hormone that is secreted by the syncytiotrophoblast?

Answer 5

hGC more than, corpus luteo, then secrets Progesterone.

Question 6

Which structures from de trophoblast grow into the endometrium and forms the placenta?

Answer 6

Villus and Chorion.

Question 7

At which week does the embryonic have 2 layers and what are the layers structure?

Answer 7

At week two. Hypoblast. Epiblast.

Question 8

What are the 3 structures that are formed from the Epiblast?

Answer 8

Ectoderm. Mesoderm. Endoderm.

Question 9

Which layer forms the notochord?

Answer 9

Mesoderm.

Question 10

Which is the layer that develop the Neural tube and neural crest?

Answer 10

Ectoderm.

Question 11

Which structure is necessary to create the neural tube and neural crest?

Answer 11

Notochord.

Question 12

Which structures of the peripheral nervous system comes from the neural crest?

Answer 12

Autosomic NS (vagus nerve, sympathetic ganglia), dorsal root ganglia, sensory nerves, Schwann cells, CNs.

Question 13

Which structures of the Ear comes from the neural crest?

Answer 13

Ossicles of the medial ear. Malleus, incus and stapes.

Question 14

Which structures of the Eye comes from the neural crest?

Answer 14

Anterior chamber (cornea, sclera, ciliary muscle, iris pigmented cells).

Question 15

Which structures of the Adrenal gland comes from the neural crest?

Answer 15

Chromaffin cells of the adrenal medulla.

Question 16

Which structures of the Mouth comes from the neural crest?

Answer 16

Odontoblast.

Question 17

Which structures of the Heart comes from the neural crest?

Answer 17

Aorticopulmonary septum (spiral septum).

Question 18

Which structures of the Digestive system comes from the neural crest?

Answer 18

Enteric nervous system, celiac ganglion, enterochromaffin cells.

Question 19

Which structures of the Thyroid comes from the neural crest?

Answer 19

Parafollicular (C) cells.

Question 20

Which structures of the Skin comes from the neural crest?

Answer 20

Melanocytes.

Question 21

Which structures come from the neural tube or Neuroectoderm?

Answer 21

Brain and spinal cord, Oligodendrocyte, Astrocytes, Ependymal cells, Optic nerve, Retina, Pineal gland, Posterior pituitary.

Question 22

Which structures come from the Surface ectoderm?

Answer 22

It does not develop neurological structures.
Lenses of the eye, Olfactory epithelium and inner ear, Anterior pituitary, Oral epithelium, Salivary glands, Epidermis, Sweat glands, Mammary glands and Anal canal distal to pectinate line.

Question 23

Which structures come from the endoderm?

Answer 23

GI tract (esophagus to pectinate line), Liver, Gallbladder, Pancreas, Lungs, Thymus, Parathyroid glands, Follicular cells of thyroid, Epithelium of bladder/urethra, and lower 2/3 of vagina.

Question 24

What is the morula?

Answer 24

The accumulated cells from the zygote.

Question 25

Which structures come from the mesoderm?

Answer 25

Bone, muscle, bone marrow, blood cells, heart, blood vessels, lymphatics, upper portion of the vagina, kidneys, adrenal cortex, gonads and dermis of skin

Question 26

What developmental structure matches each of the falling descriptions: The Fetal placenta structure that secret hCG? The Maternal component of the placenta?

Answer 26

First is Syncytiotrophoblast. Second is Deciuda Basalis.

Question 27

What is the relationship between the notochord, the neural plate, the neural tube, an the neural crest?

Answer 27

The notochord induces ectoderm to form the neural plate, and this one gives one to the neural tube and neural crest cells.

Question 28

What is the embryologic origin of the following adult structures? 1)Anterior pituitary. 2)Cornea. 3)Lens. 4)Retina. 5)Olfactory epithelium. 6)Mammary glands. 7)Salivary glands. 8)Sweat glands.

Answer 28

Surface ectoderm: 1, 3, 5, 6, 7 and 8. Neuroectoderm: 4 Neural crest: 2

Question 29

What embryonic structure (derived from the Hypoblast) serves as a secondary energy source?

Answer 29

Endodermal Yolk sac.

Question 30

What embryonic structure serves as reservoir of nonspecialized

Answer 30

Endodermal yolk sac.