Question

In: Biology

Which of the following is not a neurogenic placode? Group of answer choices a. Trigeminal b....

Which of the following is not a neurogenic placode?

Group of answer choices

a. Trigeminal

b. Nodose

c. Otic

d. Lens

e. Olfactory

Solutions

Expert Solution

Answer: Option (c)- Otic, Option (d)- Lens, and Option (e)- Olfactory are not neurogenic placode.

Explanation: The Otic, lens and the Olfactory placode are not neurogenic placodes.

The otic placode is the first placode that can be found on the surface of the embryo. It is also a sensory placode. It forms an otic vesicle or otocyst and finally matures to form cochlea and auditory ganglion.

The olfactory placode will form nose Olfactory epithelium and it a sensory placode.

The lens placode will finally mature to form the lens fiber and lens epithelium.

Trigeminal placode is a neurogenic placode and forms neurons that carry somatosensory information from the brain.

Nodose placode is a neurogenic placode(epibranchial). It gives rise to neurons that convey information from visceral organs and from the oral cavity.

So from the above discussion it is clear that option (a), and (b) are not the answer and the rest of the options are the right answer as indicated above.


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