If it was a serious concussion then you would call 911 and have an ambulance immediately transport the athlete.
C because reversibility means when taking a break it'll be hard to get back on schedule <span />
Answer:
Each has an amine group at one end, an acid group at the other, and a distinctive side chain.
Explanation:
The unique chemical structure attached to the backbone of each amino acid that differentiates one amino acid from another.