What is the role of the nervous system in muscle contraction?

The nervous system sends impulses down motor neurons to muscles, triggering changes in the chemistry of muscle fibers and causing them to contract.

Skin, Bone, and Muscle Under the Microscope

7th Grade•40 minutes

I can describe the differences between skin, bone, and muscle tissues when viewed under a microscope.

Skeletal muscles are anchored to bones by tendons, which are made of connective tissue.

Muscles work in teams; the agonist contracts to move a section of the skeleton, while the antagonist relaxes to allow the movement.

Muscle contractions are powered by the interaction of myosin and actin within sarcomeres, requiring energy from respiration.

This lesson includes 7 practice questions to reinforce learning.

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1. What type of tissue connects muscles to bones?

2. Describe the role of skeletal muscles in body movement.

3. Explain the difference between an agonist and an antagonist muscle.

...and 4 more questions

The Major Muscles of the Human Body | Science | ClickView

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