http://www.principlesofanatomyandphysiology.com/help-me-please/ Discussions on The Human Body Sat, 17 Dec 2011 21:48:12 +0000 hourly 1 http://wordpress.org/?v=3.2.1 http://www.principlesofanatomyandphysiology.com/help-me-please/comment-page-1/#comment-3702 Bean Sun, 06 Dec 2009 16:21:27 +0000 http://www.principlesofanatomyandphysiology.com/help-me-please/#comment-3702 3) The muscles work together contracting and relaxing. When the biceps muscle (at the front attached to the radius bone) contracts, the triceps muscle (at the back attached to the ulna) relaxes causing the arm bend at the elbow. When the triceps muscle contracts and the biceps muscle relaxes the arm straightens. This is because when each muscle contracts, it is pulling on the bone as the other relaxes, releasing their pull. I revised this recently. You should try looking in Wikipedia for the other answers 3) The muscles work together contracting and relaxing. When the biceps muscle (at the front attached to the radius bone) contracts, the triceps muscle (at the back attached to the ulna) relaxes causing the arm bend at the elbow. When the triceps muscle contracts and the biceps muscle relaxes the arm straightens. This is because when each muscle contracts, it is pulling on the bone as the other relaxes, releasing their pull.
I revised this recently. You should try looking in Wikipedia for the other answers

]]> http://www.principlesofanatomyandphysiology.com/help-me-please/comment-page-1/#comment-3701 unknown Sun, 06 Dec 2009 15:55:40 +0000 http://www.principlesofanatomyandphysiology.com/help-me-please/#comment-3701 3) The muscles work together contracting and relaxing. When the biceps muscle (at the front attached to the radius bone) contracts, the triceps muscle (at the back attached to the ulna) relaxes causing the arm bend at the elbow. When the triceps muscle contracts and the biceps muscle relaxes the arm straightens. This is because when each muscle contracts, it is pulling on the bone as the other relaxes, releasing their pull. 3) The muscles work together contracting and relaxing. When the biceps muscle (at the front attached to the radius bone) contracts, the triceps muscle (at the back attached to the ulna) relaxes causing the arm bend at the elbow. When the triceps muscle contracts and the biceps muscle relaxes the arm straightens. This is because when each muscle contracts, it is pulling on the bone as the other relaxes, releasing their pull.

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