Question

A rock climber grasps onto a ledge on a rock wall. How do the bones and muscles in his arm interact to allow him to hold on?

A ) All the muscles in his arm are contract to hold his arm in position

B ) His arm muscles work in pairs so that one contracts while the other one relaxes to hold his arm in position

C ) His arm muscles work independently of each other to hold his arm in position

D ) All of his muscles relax to hold his arm in position

Answer 1

For anyone who is in Connections Academy the answer was B.