Question

1. how does the authors discussion of axons (paragraphs 7 - 9) develop our understanding of the effects of concussions on the brain?

a. the author describes axons as neurons that surround and cushion the brain, which then suffer the most damage from a concussion.
b. the author discusses the long and complicated process of axons forming connections in the brain, emphasizing how long it can take for a brain to recover from a concussion.
c. the author shows how axons are the most important cells in the human body and that they cause the most problems when damaged by a concussion.
d. the author emphasizes the importance of axons to brain function and how they develop over time, highlighting the prolonged damage possible from a concussion.

Explanation:

Axons are crucial for brain function as they transmit signals. If they are damaged (e.g., in a concussion), and since they develop over time, this shows that the damage from a concussion can be long - lasting. Option A is incorrect as axons are not for cushioning. Option B focuses more on formation rather than the damage aspect. Option C overstates the "most important" claim.

Answer:

D. The author emphasizes the importance of axons to brain function and how they develop over time, highlighting the prolonged damage possible from a concussion.