Which of the following types of neurons are replaced throughout adult life?
a) retinal ganglion cellsb) auditory outer and inner hair cellsc) retinal bipolar cellsd) olfactory receptor cells

D) olfactory receptor cells

Explanation:

The olfactory receptor neurons are located in the nasal cavity, they have dendrites that go all the way to the mucus. In vertebrates the olfactory system has the parcularity of performing neurogenesis and the replacement of degenerating receptor neurons through all the adult life.

I hope you can find this information useful and interesting! Good luck!

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation:

a few examples of ethical concerns involving genetically engineering of humans include

-privacy of genetically tested people

- potential side effects

-long term effects