Chapter 8 Flashcards

1
Q

Pre embryonic stage (conception to day 14)

A

Fertilization of ovum in the uterine tube
Fertilized ovum begins cell division
Solid sphere of cells forms → cavity opens up in the sphere
outer layer of sphere becomes fetal contribution to placenta
Inner cell mass becomes embryo
Implantation → inner cell mass develops into embryonic disk
Ectoderm, endoderm, mesoderm forms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Embryonic stage ( day 15 → end of 8th week)

A

Organs begin to form
Formation of nervous system begins

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Ectoderm develops into…

A

Sensory organs, epidermis, and nervous system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Mesoderm develops into…

A

Dermis, muscles, skeleton, excretory and circulatory systems

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Endoderm develops into…

A

Gut, liver, pancreas, respiratory system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Fetal stage (end of 8th week → to birth)

A

Nervous system develops fully
Myelination begins

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Nervous system phases

A

1) tissue that will become NS comes together to form a tube running along the back of the embryo
2) when the tube closes, brain formation begins

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Neural plate

A

Longitudinal thickening of the ectoderm
Forms on the surface of the embryo, from head to tail region

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Neural groove

A

Edges of neural plate fold

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Neural tube

A

When folds of neural groove touch (day 21)
Closes first in future cervical spine region

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Neuropores

A

When neural groove zips closed, rostraly and causally openings are left

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Neural crest

A

Cells adjacent to neural tube separate from tube and remaining ectoderm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Soma

A

Cell body of a neuron

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Somites

A

Spherical cell clusters of mesoderm formed parallel to the neural tube

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Sclerotome

A

Anteromedial part of somite
Becomes vertebrae and skull

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Myotome

A

posteromedial part of somite
Becomes skeletal muscle
AND
After embryonic stage, a group of muscles innervated by a segmental spinal nerve

17
Q

Dermatome

A

Lateral part of somite
Becomes dermis
AND
after embryonic stage, the dermis innervated by a single spinal nerve

18
Q

Motor plate

A

Ventral section of neural tube

19
Q

Association plate

A

Dorsal section of neural tube

20
Q

Ventral horn

A

Gray matter derived from the motor plate

21
Q

Dorsal horn

A

Gray matter derived from association plate

22
Q

Primary sensory neurons

A

Peripheral sensory neurons
Convey information from sensory receptors to association plate

23
Q

Cauda Equina

A

Collection of lumbosacral nerve roots that extend inferior the the end of the spinal cord (resembles horses tail)

24
Q

Filum terminale

A

Continuation of the Dura, pia, and glia connecting to the end of the spinal cord with the coccyx

25
Brain formation
Begins day 28
26
Hindbrain
Becomes medulla, pons, and cerebellum
27
Posterior forebrain
Becomes diencephalon
28
Anterior forebrain
Becomes telencephalon