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.
The card, Tebow's first, is a $120 keeper from Press Pass that's No. 1 on Beckett's 20-card Hot List, ahead of cards featuring fellow rookie Sam Bradford, 2009 sensation Mark Sanchez, Titans running back Chris Johnson and Kevin Kolb, the Eagles' new starting quarterback.