Embryology 1

Question 1

every gland in our body is what?

Answer 1

some type of epithelium

- an invagination of the epithelium

Question 2

skeletal muscle is derived from?

Answer 2

SOMITES-

paraxial mesoderm

Question 3

cardiac muscle is derived from

Answer 3

splanchnic mesoderm

Question 4

smooth muscle is derived from?

Answer 4

splanchnic mesoderm AND surface ectoderm

Question 5

nervous system tissue is derived from?

Answer 5

ectoderm +contributions from neural crest cells

Question 6

schwann cells develop from?

Answer 6

neural crest cells

Question 7

Connective tissue develops from?

Answer 7

embryonic mesenchyme - a tissue developing mainly from the mesoderm - middle layer of the embryo

Question 8

intramembranous bone formation? how many times does it occur

Answer 8

TRICK question - only once

after it is termed remodeling process

Question 9

when does direct ossification begin?

Answer 9

fetal period

Question 10

mesenchyme that contributes to the formation of most of the skull and all of the facial skeleton is derived from?

Answer 10

cephalic NEURAL CREST CELLS - ECTOMENSENCYME

Question 11

skull will not form without?

Answer 11

the brain

Question 12

neurocranium - components and type of bone development?

Answer 12

cranial vault/ calvaria is intramembraneous bone of neural crest cell and paraxial mesoderm origin

cranial base- endochondral bone of neural crest origin and paraxial mesoderm

Question 13

viscerocranium/face - type of bone development

Answer 13

intramembraneous bone of neural crest origin

Question 14

masticatory apparatus - type of bone development

Answer 14

compromised of the jaw bones (intramembraneous ossification) and teeth

Question 15

the skull is formed by…

Answer 15

intramembraneous and endochondral ossification

all through epithelium mesenchymal induction influence

Question 16

membranous neurocranium bones

Answer 16

frontal parietal and squamous portion of the occipital bone

Question 17

mesenchymal bone cells derived from?

Answer 17

neural crest cells and somitomeres

Question 18

base of skull

Answer 18

from cartilaginous neurocranium - initially represented by several sets of paired cartilages

Question 19

cartilagenous viscerocranium

general

Answer 19

pharyngeal arch 1 and 2

Question 20

membraneous viscerocranium

general

Answer 20

maxillary process
(superficial)
maxillary process (deep)
Mandibular process

Question 21

pharyngeal arch 1

Answer 21

cartilagenous viscerocranium
meckels cartilage
malleus
incus

Question 22

pharyngeal arch II

Answer 22

cartilagenous viscerocranium
reichart’s cartilage
stapes
styloid process

Question 23

superficial maxillary process components and bone formation type

Answer 23

membranous viscerocranium
- squamous part of temporal bone 
zygomatic
maxillary
premaxillary
nasal
lacrimal

Question 24

maxillary process components and bone formation type

Answer 24

membranous viscerocranium
palatine
vomer
pterygoid

Question 25

mandibular formation type

Answer 25

membranous viscerocranium

Question 26

sutures in skull

Answer 26

divide the flat bones in the skull and are separated by neural crest cell derived connective tissue