Quiz 3 Flashcards

1
Q

What does the endoderm develop into?

A

the gut and internal organs

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2
Q

What does the mesoderm develop into?

A

muscle, bone, and connective tissue

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3
Q

What does the ectoderm develop into?

A

nervous system and skin

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4
Q

What happens in the stage of “primary neuralation”

A

caudal and cranial nerves close off at the end of 4 weeks

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5
Q

What do the nerual crest and cranial placodes give rise to?

A

The PNS, specifically autonomic

Neural crest cells have extensive migrations and can differentiate into many different cells

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6
Q

What are placodes?

A

thickening of the ectoderm at the rostral end of neurocrests

This in combination with neural crest cells form sensory components of the PNS and head region

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7
Q

Describe the development of the neural tube

A
  1. neural plate forms
  2. neural groove and folds form
  3. neural tube starts to fold in on itself
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8
Q

What are the three primary brain vesicles and when do they appear?

A
  • appear at the end of week 4
  • prosencephalon (forebrain)
  • mesencephalon (midbrain)
  • rhombencephalon (hindbrain)
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9
Q

What does the prosencephalon give rise to?

A

telencephalon and diencephalon

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10
Q

What does the mesencephalon give rise to?

A

mesencephalon

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11
Q

What does the rhombencephalon give rise to?

A

metencephalon and myelencephalon

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12
Q

What do neuroepithelial cells give rise to and how do they divide?

A

Divide asymmetrically and give rise to radial glial and a neuron

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13
Q

Which is top and bottom of notch and numb?

A

Notch is top, numb is bottom

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14
Q

Describe how the brain grows in an inside out fashion

A

The newer neurons form on top, more in the cortical plate. Older neurons are deeper in the subventricular and ventricular zone.

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15
Q

Which layer/s are responsible for cortico connections and abstract thought?

A

Layers 2/3

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16
Q

Which neurons make up 80% of excitatory neurons?

A

cortical neurons

17
Q

Which way does a pyramidal neuron grow?

18
Q

At what age do you have all the neurons you will ever have?

19
Q

What does the potine flexure do?

A

Puts pressure on the rhombencephalon, causing the tube to open and flatten out

20
Q

What do the rhombic lips form from?

A

Alar plate

21
Q

Thickening of the basal part of wall next to the diencephalon forms what?

A

basal ganglia

22
Q

Thickening of diencephalon forms what?

A

Thalamas and hypothalamus

23
Q

The telencephalon fusing with the diencephalon forms what?

24
Q

How long does the growth of the telencephalon take?

25
Q

What lines lateral wall of ventricle anterior horn?

A

Head of caudate

26
Q

What lines lateral wall of ventricle body?

A

Caudate body

27
Q

What lines roof of ventricle inferior horn?

A

Caudate tail

28
Q

What forms the floor of ventricle body?

29
Q

What forms the roof of ventricle body?

A

Corpus Callosum

30
Q

What forms floor and medial wall of inferior horn?

A

Hippocampus

31
Q

What is a thin membrane that divides both hemispheres?

A

Sepptum Palucem