Consider the Following Statement,and Explain Whether or Not It Is

question 22

Essay

Consider the following statement,and explain whether or not it is sensible: NASA hopes to build a new telescope that will allow us to see 100 million light-years into the past.

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Definitions:

Blood-Brain Barrier

The blood-brain barrier is a semi-permeable barrier of endothelial cells that prevents most substances in the blood from non-selectively crossing into the brain, protecting it from pathogens and toxins.

Myelin Sheaths

Protective covering made of fat and protein that surrounds nerve fibers, facilitating the rapid transmission of nerve impulses.

Myelin Sheath

A fatty layer that covers and insulates nerve fibers to enhance the speed of electrical impulses.

Nodes of Ranvier

Gaps in the myelin sheath of a nerve fiber where the axon is exposed, allowing for the rapid transmission of nerve impulses through saltatory conduction.