Differentiate among the types of muscle contractions. 1  Isotonic contractions generate force by changing the length of the muscle and can be concentric contractions or eccentric contractions.  A concentric contraction causes muscles to shorten, thereby generating force.
A 1993 Upper Deck Derek Jeter Rookie card number 449 has a book value of about $15.00 in near/mint -mint condition. Professionally graded cards will sell for more. Condition is important. Common flaws with baseball cards include: rounded edges, creases, off centered, and faded color.
1954 Topps Hank Aaron Rookie Card. This 1954 Topps Hank Aaron rookie card is a collectors dream. High grade copies can sell for over $100,000. #128 of this vintage 1954 Topps Set is still well within most collectors price range. A nice PSA 5 or 6 can still be picked up for under $2500.