BioQ ectoderm?

[utdent20]

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What would you put as the answer?
research into a new drug reveals that on of its side effects is to destroy the ectodermal germ layer of the devleoping embryos. If this drug were administered to a pregnant woman, which would be absent in the fetus?
a. adrenal medulla
b.femur
c. stomach
d. heart
e. iliac vien

and why???

 

[ksksks]

A. adrenal medulla

ectoderm --> neural crest --> nerves, skin, bone of brain, adrenal medulla and components of the PNS

 

[utdent20]

does that mean the skeletal in in the ectoderm, thus any of the bones will comes in ectoderm?

 

[ksksks]

i am not 100% sure on this so dont quote me on it, but from what i remember, the skull and backbone are formed from ectoderm for sure...0_0...might want to look it up

 

[Sea of ASH]

the answer is A

process of elimination, cant be d and e cuz thats the circulatory (meso), c is digestive tract, b is conncetive tissue (meso)

 

[utdent20]

B would be a connective tissue?? Femur is a bone.

 

[utdent20]

I thought ligaments and tendons are connective tissues. though there could be more.

 

[Andre3k]

I thought the ectoderm was the integument, lens, and the nervous system. Neither one of these choices are right

 

[Chesnok]

B would be a connective tissue?? Femur is a bone.

Yes , it's a calcified/hardened connective tissue like cartilage ...............and now a great surprise for you ...... blood is a connective tissue too. No offense.
GL with DAT.

 

[Chesnok]

I thought the ectoderm was the integument, lens, and the nervous system. Neither one of these choices are right

it's like an exception--just remeber adrenal medulla.

 

[utdent20]

Thanks!

 

[Sea of ASH]

conncetive tissues are: bone, blood, cartilage, fat, tendons and ligaments....

am i missing any? well u get the point

 

[Doa110]

A.
Adrenal medulla is derived from embryonic neural crest and nural crest is a transient component of ectoderm. Basically AM is nothing but a ganlion of the sympathic nervous system.

 

[achilles2]

A.
Adrenal medulla is derived from embryonic neural crest and nural crest is a transient component of ectoderm. Basically AM is nothing but a ganlion of the sympathic nervous system.

x2

this is why adrenaline and nor-adrenaline are so similar.

Check out my notes on development, it goes over this.

 

[mcdds75]

A. adrenal medulla

ectoderm --> neural crest --> nerves, skin, bone of brain, adrenal medulla and components of the PNS

Yes the chromaffin cells of the AM are ectoderm derived, but also know that the PNS is derived from 3 sources: neural crest cells, neural tube, and Mesoderm which give rise to the dura and to some connective tissue of peripheral fibers. This could pose as a trick question on PNS?

 

[mcdds75]

FYI...another trick question could come from the Notochord during development which is a cylinder of mesoderm which induces the formation of each vertebral body and forms the nuclues pulposus of each disk!! I quess these NS components would be Meso derived.

 

[yakuza]

What would you put as the answer?
research into a new drug reveals that on of its side effects is to destroy the ectodermal germ layer of the devleoping embryos. If this drug were administered to a pregnant woman, which would be absent in the fetus?
a. adrenal medulla
b.femur
c. stomach
d. heart
e. iliac vien

and why???

What a meanass question! Where did you get this from?

I would've became confused with mesoderm's adrenal cortex but out of process elim, its A