Question

Athletes that are good at jumping and sprinting have muscles called _______.
A. fast-twitch muscles
B. slow-twitch muscles
C. peristalsis muscles
D. smooth muscles

Answer 1

i believe the anwser is A

Answer 2

Slow Twitch (Type I)
The slow muscles are more efficient at using oxygen to generate more fuel (known as ATP) for continuous, extended muscle contractions over a long time. They fire more slowly than fast twitch fibers and can go for a long time before they fatigue. Therefore, slow twitch fibers are great at helping athletes run marathons and bicycle for hours.

Fast Twitch (Type II)
Because fast twitch fibers use anaerobic metabolism to create fuel, they are much better at generating short bursts of strength or speed than slow muscles.

http://sportsmedicine.about.com/od/anatomyandphysiology/a/MuscleFiberType.htm

Answer 3

so B

Answer 4

C is like muscles around your esophagus that force the food down to the stomach.
D is a type of muscle found around blood vessels and organs.

Answer 5

So it would be D?

Answer 6

No, It's definitely not D. D has nothing to do with this. You need to find which of the answers fits someone who would be sprinting. Needs lots of energy and speed quickly, but not for long periods of time.

Answer 7

I think its A i don't think its B

Answer 8

Correct.