What connects muscles to bones?
AnswerTendons
Tendons attach muscles to bones so muscle pulls can move the skeleton.
Fitness · Facts & stats
Activity facts & stats
7 fact-checked facts about physical activity and how the body moves, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
Which organ is a muscle that pumps blood around the body?
AnswerHeart
The heart is made of cardiac muscle that contracts continuously to pump blood.
Going deeper
What does MET stand for in exercise science?
AnswerMetabolic equivalent of task
A MET value expresses the energy cost of an activity so that different activities can be compared.
The '10,000 steps a day' idea is traced to a 1960s pedometer from which country?
AnswerJapan
A 1965 Japanese pedometer was sold as 'manpo-kei', meaning '10,000-step meter'.
About how many bones are in the adult human skeleton?
Answer206
Adults have about 206 bones; babies are born with more that fuse over time.
Expert level
One MET is defined as the energy used while doing what?
AnswerSitting quietly at rest
1 MET is resting energy use; an activity rated 4 METs uses about four times as much.
Which molecule do muscle cells use as their direct energy source for contraction?
AnswerATP
Adenosine triphosphate (ATP) powers the movement of muscle proteins.
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